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zerotofifty Samba Member
Joined: December 27, 2003 Posts: 3793
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Posted: Fri Aug 30, 2024 9:03 pm Post subject: Re: One way to prevent engine fires |
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Tbob wrote: |
Heres a couple of thoughts about fires in our vans. One thought is that the nylon fuel lines run along the frame of the van, and in the event of a fire, I wonder if they melt and then gravity allows fuel from the tank to flow out, fueling the fire with gasoline, which is obviously not good. So when I refurbished my 1985, I made and ran all new metal fuel lines, with the engine end higher than the top of the fuel tank. I did both the pressure and the return. There is no easy way to make the fuel tank end higher than the top of the fuel tank, so I didn't, but I felt that was an acceptable compromise, as the fuel tank is several feet away from the engine, there most the fires are.
I have watched as Volkswagens(especially vans) when they had an engine fire, it often ended in total destruction of the van, and I wonder if that may have been because of the fuel in the tank gravity feeding the fire. Most vehicles have their fuel lines go into the top of the tank, so they can't gravity feed fuel. I just tried to duplicate that concept.
The second thing I do with all my waterboxers when I replace the fuel hoses is make a small bracket and move the fuel pressure regulator from its psition right next to the distributor(distributors are known spark event locations(!), and move it back and mount it to the left hand side upper transmission bolt. It's further away from the distributor, and maybe thats a good thing. I have so idea how many engine fires, if any, were caused by that proximity, bey it was easy enough to move, so I did. |
For the pressure regulator, use a high pressure hose for the vacuum hose, and hose clamp both ends of that hose.
The fire failure mode is when the regulator diaphragm leaks, when this happens high pressure gasoline is introduced to that vacuum hose. stock, that hose is not high pressure, and not clamped. The high pressure gasoline can easily blow out this stock vacuum hose. When this happens the gasoline sprays out. If that hose is high pressure and clamped, the gasoline will be contained and be directed harmlessly into the intake manifold, which will stall the motor, which will then cause the fuel pump to shut off, fire averted!!!! |
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E1 Samba Member
Joined: January 21, 2013 Posts: 8300 Location: Westfalia, Earth
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Posted: Fri Aug 30, 2024 9:37 am Post subject: Re: One way to prevent engine fires |
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Xevin wrote: |
Great story E. Thanks for sharing. |
Thanks, and Kudos again for being there in Portland.  _________________ 1984 Westfailure/2.1 Digijet/5.43 Ring & Pinion/Peloquin/D-rated BFG KO2s
AI has spoken to further illiteracy, to steal, to cheat, and to replace humans
"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere." — Colin Chapman |
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Xevin  Samba Member
Joined: January 08, 2014 Posts: 8662
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Posted: Fri Aug 30, 2024 9:35 am Post subject: Re: One way to prevent engine fires |
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Great story E. Thanks for sharing. _________________ Keep on Busin'
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
Clatter wrote: |
Damn that Xevin...  |
skills@eurocarsplus wrote: |
I respect Xevin and he's a turd |
SGKent wrote: |
My God! Xevin and I 100% agree |
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E1 Samba Member
Joined: January 21, 2013 Posts: 8300 Location: Westfalia, Earth
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Posted: Fri Aug 30, 2024 7:11 am Post subject: Re: One way to prevent engine fires |
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Five Stars on this idea.
Another kit for vendors?
One thing worth noting about the nylon fuel lines… after our total-loss, sixty- to eighty vertical-foot rollover in 2018, a nylon fuel line had sheared and was POURING gas onto the exhaust.
The only thing that kept it from immediately burning down was that we’d driven a scant half-mile after a twenty-minute shutdown to get two coffees. That three-minute stop after being full-hot took twenty because of an insightful, life conversation with the store’s Korean owner.
Ten days later, we returned to that store to thank the owner for the talk, and to tell him we’d crashed right after meeting him. He said “THAT WAS YOU?!!!” and I told him he was almost the last person we’d ever seen alive.
This was a powerful, human moment. He immediately teared up with the moment’s gravity, as did we, and we hugged for a good minute.
I apologized that the crash had wasted our coffees, and showed him my Yeti cup, now full of dents and scratches from the crash. He told me to fill our cups, then looked at us with a smile and said “No Charge.”
All this to say that in life, sometimes it pays to engage with people and see what they’re all about.
Thanks and Love to that corner storekeeper in Lyons, Oregon. I am drinking coffee from that same cup right now, a daily reminder I’ll never, ever replace.
Hope to see him again sometime, surely he’ll never forget this incident — and obviously, nor will we. If anyone knows this place, please say Hello and Thanks Again for us, I have a strong feeling he’s still there. _________________ 1984 Westfailure/2.1 Digijet/5.43 Ring & Pinion/Peloquin/D-rated BFG KO2s
AI has spoken to further illiteracy, to steal, to cheat, and to replace humans
"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere." — Colin Chapman |
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Tbob Samba Member
Joined: May 26, 2007 Posts: 437 Location: Pensacola, Fl.
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Posted: Fri Aug 30, 2024 6:41 am Post subject: Re: One way to prevent engine fires |
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Heres a couple of thoughts about fires in our vans. One thought is that the nylon fuel lines run along the frame of the van, and in the event of a fire, I wonder if they melt and then gravity allows fuel from the tank to flow out, fueling the fire with gasoline, which is obviously not good. So when I refurbished my 1985, I made and ran all new metal fuel lines, with the engine end higher than the top of the fuel tank. I did both the pressure and the return. There is no easy way to make the fuel tank end higher than the top of the fuel tank, so I didn't, but I felt that was an acceptable compromise, as the fuel tank is several feet away from the engine, there most the fires are.
I have watched as Volkswagens(especially vans) when they had an engine fire, it often ended in total destruction of the van, and I wonder if that may have been because of the fuel in the tank gravity feeding the fire. Most vehicles have their fuel lines go into the top of the tank, so they can't gravity feed fuel. I just tried to duplicate that concept.
The second thing I do with all my waterboxers when I replace the fuel hoses is make a small bracket and move the fuel pressure regulator from its psition right next to the distributor(distributors are known spark event locations(!), and move it back and mount it to the left hand side upper transmission bolt. It's further away from the distributor, and maybe thats a good thing. I have so idea how many engine fires, if any, were caused by that proximity, bey it was easy enough to move, so I did. _________________ 1969 Deluxe, owned since 1973
1973 Westfalia, owned since 1983
1980 Westfalia, watercooled conversion
1985 Westfalia, stock!
1986 Westfakia, Audi I-4 conversion
A couple of trucks and a couple of Jeeps |
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E1 Samba Member
Joined: January 21, 2013 Posts: 8300 Location: Westfalia, Earth
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Posted: Thu Aug 29, 2024 10:34 pm Post subject: Re: One way to prevent engine fires |
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Regardless of the thread title, the OP was asking about stopping a fire — or at least, preventing it from getting worse.
DanHoug wrote: |
E1 wrote: |
Said it a few times, but…
There’s a great product opportunity for a specific, user-installable onboard fire extinguisher system for VW buses… and a second product for a no-brainer power shutoff. |
i can't imagine producing a bus-specific fire arresting product that would be implemented on 40+ year old vehicles with owners still running their original fuel lines, haven't tended to that 'gas smell' they've had for the past 3 years, and worst of all.... don't wash their engine. when their bus burns up, they'll cry foul and attempt sewage. or rather suing. we are a fickle bunch.
don't get me wrong, these manually fired Halon-type are great suppressant systems. but they are intended for SCCA cars that undergo a technical inspection before each event, are installed by enthusiasts and inspected for corrosion, clogged nozzles, and physical damage. this ain't for the 'set and forget' crowd. that's what the Blazecut is for, and we're seeing how (in)effective that is. |
Very different application, but same end result we’d all hope for…
Tech inspection need not apply, and by the way, in SCCA as mentioned all the inspector looks for is an intact system without obvious flaws, and a full extinguisher bottle. They’re not fire experts *at all*, that’s not really what they do… they’re mostly focused on mechanical safety, current belts, proper fuel line and connections, etc.
I don’t subscribe to the liability argument, any more than Blazecut (or the Element units) which as you’ve said are specific in what they can/can’t do.
The web is full of systems used on RVs, Jeeps, whatever…
All I’m envisioning is any system, automatic or user-activated, that keeps a van from burning down — and especially if any other option might well be available. It’d be reasonably easy for an enterprising fire systems manufacturer to compose a ready-to-install system for whatever type of vehicle that needs one, there’s nothing special about Vanagons in doing this.
Like this, as one example used in far dirtier environments than most van use:
https://m.youtube.com/watch?v=HD6p0vJG-Ss&pp=ygUXZW5naW5lIGJheSBmaXJlIHN5c3RlbXM%3D _________________ 1984 Westfailure/2.1 Digijet/5.43 Ring & Pinion/Peloquin/D-rated BFG KO2s
AI has spoken to further illiteracy, to steal, to cheat, and to replace humans
"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere." — Colin Chapman |
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markswagen Samba Member
Joined: January 28, 2018 Posts: 1555 Location: san diego
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Posted: Thu Aug 29, 2024 9:50 pm Post subject: Re: One way to prevent engine fires |
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our fire l believe was caused by those plastic fuel injector rails.
as they were the ONLY un-upgraded part of the system.
l have a plan to solve the other issue, testing is required.
zerotofifty wrote: |
Despite this thread's title, the discussion has little about fire prevention.
The fire prevention issues are easy to deal with, and are pretty basic. Good hoses, good hose clamps, no cracked injectors, eliminate the gasoline bulkhead fitting, safe wires, proper fusing. Get these all correct and you go a long way towards fire prevention, much more so than with fancy fire extinguishing systems, fuel and battery cut offs.
Do take care of the basics, then drive with peace of mind, all the other extinguishing things come second.  |
_________________ markswagen {mobile mechanic} san diego area all early VW's cared for.
619 201 0310 |
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zerotofifty Samba Member
Joined: December 27, 2003 Posts: 3793
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Posted: Thu Aug 29, 2024 5:38 pm Post subject: Re: One way to prevent engine fires |
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Despite this thread's title, the discussion has little about fire prevention.
The fire prevention issues are easy to deal with, and are pretty basic. Good hoses, good hose clamps, no cracked injectors, eliminate the gasoline bulkhead fitting, safe wires, proper fusing. Get these all correct and you go a long way towards fire prevention, much more so than with fancy fire extinguishing systems, fuel and battery cut offs.
Do take care of the basics, then drive with peace of mind, all the other extinguishing things come second.  |
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DanHoug Samba Member

Joined: December 05, 2016 Posts: 5722 Location: Bemidji, MN
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Posted: Thu Aug 29, 2024 5:24 pm Post subject: Re: One way to prevent engine fires |
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Sodo wrote: |
DanHoug wrote: |
i'll bet that at -20F i'm drawing at least 300-400 amps, maybe more, trying to start a cold engine. i'll have to measure it some stupid cold day, coming up shortly i imagine. |
I'd like to see that test. |
yeah, i'll pull some amp readings here when it cools down. the data might stop me from yammerin' some shite. or it might make me a god! _________________ -dan
60% of what you find on the internet is wrong, including this post.
'87 Westy & '89 Westy both 2.1 4spd
Past projects can be found at--
www.thefixitworkshop.com |
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Sodo Samba Member

Joined: July 06, 2007 Posts: 10640 Location: Western WA
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Posted: Thu Aug 29, 2024 5:11 pm Post subject: Re: One way to prevent engine fires |
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DanHoug wrote: |
i'll bet that at -20F i'm drawing at least 300-400 amps, maybe more, trying to start a cold engine. i'll have to measure it some stupid cold day, coming up shortly i imagine. |
I'd like to see that test. _________________
'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb |
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a914622 Samba Member

Joined: July 29, 2004 Posts: 923 Location: Westend of HWY2 , Wash
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Posted: Thu Aug 29, 2024 3:24 pm Post subject: Re: One way to prevent engine fires |
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Ops forgot
The machine tool systems used a pressure switch/relay . Bottle full up to pressure power switch on. Bottle empty, no pressure, power off. I don’t think that would be to hard to do right at the battery or at the starter. _________________ 87 gl powerd buy 2.5subaru
75 914 getting 2.2t subaru scratch that SVX subaru |
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a914622 Samba Member

Joined: July 29, 2004 Posts: 923 Location: Westend of HWY2 , Wash
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Posted: Thu Aug 29, 2024 3:18 pm Post subject: Re: One way to prevent engine fires |
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YES there is a bottle extinguisher style that is activated like the blazecut but more power behind it.
When I was selling machine tools some materials needed the system to get insurance . Some systems added 5-10k to the machine. Probably why you done see them in the automotive ind. a google search shows 5-6 companies now selling machine tool extinguishers.
Additionally air craft still use a halon system. Again they are spendy.. I think a 10oz is like 300 bucks.
And yes I can’t believe the money spent on tinsel for the vanagons wile fuel lines are engorged. I would think an all metal replacement would be best👍
Jeff _________________ 87 gl powerd buy 2.5subaru
75 914 getting 2.2t subaru scratch that SVX subaru |
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DanHoug Samba Member

Joined: December 05, 2016 Posts: 5722 Location: Bemidji, MN
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Posted: Thu Aug 29, 2024 3:04 pm Post subject: Re: One way to prevent engine fires |
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E1 wrote: |
Said it a few times, but…
There’s a great product opportunity for a specific, user-installable onboard fire extinguisher system for VW buses… and a second product for a no-brainer power shutoff. |
i can't imagine producing a bus-specific fire arresting product that would be implemented on 40+ year old vehicles with owners still running their original fuel lines, haven't tended to that 'gas smell' they've had for the past 3 years, and worst of all.... don't wash their engine. when their bus burns up, they'll cry foul and attempt sewage. or rather suing. we are a fickle bunch.
don't get me wrong, these manually fired Halon-type are great suppressant systems. but they are intended for SCCA cars that undergo a technical inspection before each event, are installed by enthusiasts and inspected for corrosion, clogged nozzles, and physical damage. this ain't for the 'set and forget' crowd. that's what the Blazecut is for, and we're seeing how (in)effective that is. _________________ -dan
60% of what you find on the internet is wrong, including this post.
'87 Westy & '89 Westy both 2.1 4spd
Past projects can be found at--
www.thefixitworkshop.com |
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E1 Samba Member
Joined: January 21, 2013 Posts: 8300 Location: Westfalia, Earth
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Posted: Thu Aug 29, 2024 11:25 am Post subject: Re: One way to prevent engine fires |
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Said it a few times, but…
There’s a great product opportunity for a specific, user-installable onboard fire extinguisher system for VW buses… and a second product for a no-brainer power shutoff. _________________ 1984 Westfailure/2.1 Digijet/5.43 Ring & Pinion/Peloquin/D-rated BFG KO2s
AI has spoken to further illiteracy, to steal, to cheat, and to replace humans
"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere." — Colin Chapman |
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DanHoug Samba Member

Joined: December 05, 2016 Posts: 5722 Location: Bemidji, MN
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Posted: Thu Aug 29, 2024 10:48 am Post subject: Re: One way to prevent engine fires |
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Sodo wrote: |
But why 600 amp?
200A is double the starter current and it's much more than double-overkill because at contact the current is prob less than 10A.
It's achieved static closed long before the starter begions drawing its 100A.
Even a 100A continuous seems overkill. |
for all y'all that live in warm climes, sure, MAYBE 100a will do ya. i'll bet that at -20F i'm drawing at least 300-400 amps, maybe more, trying to start a cold engine. i'll have to measure it some stupid cold day, coming up shortly i imagine. at those temps, the starter is turning so slow it is akin to dead short thru the commutator. ironically but sensibly, you can burn up a starter motor far quicker at -20F than 100F! _________________ -dan
60% of what you find on the internet is wrong, including this post.
'87 Westy & '89 Westy both 2.1 4spd
Past projects can be found at--
www.thefixitworkshop.com |
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Sodo Samba Member

Joined: July 06, 2007 Posts: 10640 Location: Western WA
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Posted: Thu Aug 29, 2024 9:57 am Post subject: Re: One way to prevent engine fires |
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DanHoug wrote: |
this might be a good reason for a continuous duty 600amp relay, activated with 'key on' position. |
That's another good plan I think, perhaps more reliable than the fusible string.
And right at the battery it protects the whole van's electrical, not just engine-fire.
But why 600 amp?
200A is double the starter current and it's much more than double-overkill because at contact the current is prob less than 10A.
It's achieved static closed long before the starter begions drawing its 100A.
Even a 100A continuous seems overkill. _________________
'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb |
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DanHoug Samba Member

Joined: December 05, 2016 Posts: 5722 Location: Bemidji, MN
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Posted: Thu Aug 29, 2024 9:36 am Post subject: Re: One way to prevent engine fires |
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markswagen wrote: |
they only work if the driver remembers that there is one there.
l have them on all of our vans.
the flames etc freaked out the wife, and she got out of the van as quickly as she could, not remembering there was a cut off.
by the time l go there it was too late.
dobryan wrote: |
And this is why I have a battery cut off switch within easy reach from the drivers seat. |
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this might be a good reason for a continuous duty 600amp relay, activated with 'key on' position. it messes with things like parking lights, radio presets, courtesy circuits but just about everyone will grab the key and turn the motor off in a bad situation, disconnecting possibly shorting circuits.
since Vanagons have a propensity to self-immolation, a $600-$900 manually operated extinguish system with a 10lb cylinder of liquid fire suppressant really may be worthwhile. for that price, they come with the pull cable, multiple heads to flood the engine compartment with retardant, and enough capacity to snuff things out. _________________ -dan
60% of what you find on the internet is wrong, including this post.
'87 Westy & '89 Westy both 2.1 4spd
Past projects can be found at--
www.thefixitworkshop.com |
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markswagen Samba Member
Joined: January 28, 2018 Posts: 1555 Location: san diego
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Posted: Thu Aug 29, 2024 8:19 am Post subject: Re: One way to prevent engine fires |
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they only work if the driver remembers that there is one there.
l have them on all of our vans.
the flames etc freaked out the wife, and she got out of the van as quickly as she could, not remembering there was a cut off.
by the time l go there it was too late.
dobryan wrote: |
And this is why I have a battery cut off switch within easy reach from the drivers seat. |
_________________ markswagen {mobile mechanic} san diego area all early VW's cared for.
619 201 0310 |
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4Gears4Tires Samba Member
Joined: October 08, 2018 Posts: 4223 Location: MD
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Posted: Thu Aug 29, 2024 7:29 am Post subject: Re: One way to prevent engine fires |
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I really like the battery cut off switch within reach of the drivers seat. But how to know to flip the switch as soon as possible?
I wonder what the effort would be to rig a smoke alarm safety switch to an alarm? Something like this? https://www.fcfnational.com.au/blog/smoke-alarm-smart-switch _________________ '87 Syncro Ferric Oxyhydroxide Superleggera Edition
'85 Westy Sciuridae Domus Edition |
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dobryan Samba Member

Joined: March 24, 2006 Posts: 17161 Location: Brookeville, MD
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