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classicbug
Samba Member
Joined: July 10, 2020
Posts: 91
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 Posted: Mon Apr 05, 2021 11:12 am Post subject: Stalls once warmed up |
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| My 1960 has developed a habit of stalling (when stopped) after about 15-20 minutes of driving. This happened several months ago, but appeared to resolve itself. I did adjust idle/mixture a couple of months ago as part of a tune up, but the problem didn't start until recently. what's strange is that I ran it for well over 20 minutes in my garage and it never stalled or stuttered. Thoughts/suggestions? |
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24757
Location: Olympia Wash Rinse & Repeat
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| Posted: Mon Apr 05, 2021 5:36 pm Post subject: Re: Stalls once warmed up |
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Post images of the engine.
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classicbug
Samba Member
Joined: July 10, 2020
Posts: 91
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| Posted: Tue Apr 06, 2021 6:20 am Post subject: Re: Stalls once warmed up |
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| Eric&Barb wrote: |
| Post images of the engine. |
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raydog
Samba Member
Joined: February 09, 2006
Posts: 1163
Location: Cape Cod
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| Posted: Tue Apr 06, 2021 7:10 am Post subject: Re: Stalls once warmed up |
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When you took the pics, was the engine cold, warm, hot? I am just noticing the fast idle/choke adjustment is on step 2.
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Eric&Barb
Samba Member
Joined: September 19, 2004
Posts: 24757
Location: Olympia Wash Rinse & Repeat
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| Posted: Tue Apr 06, 2021 8:37 am Post subject: Re: Stalls once warmed up |
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OK, you do not have the original 36 HP engine. You have a duel port 1600 with Bocar 34PICT-3. Check the idle shut off solenoid is tight and the wiring to it is not failing. Get that wire off the top of the carb, where it will wear thru and short out. That wire should be run below the throttle cable so it is not rubbing against some hard surface.
Do you still have the heat exchangers in place or replaced them with the J-tubes?
Please do post a few more images of the engine a bit farther back to show more of it.
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classicbug
Samba Member
Joined: July 10, 2020
Posts: 91
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| Posted: Tue Apr 06, 2021 9:28 am Post subject: Re: Stalls once warmed up |
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| raydog wrote: |
| When you took the pics, was the engine cold, warm, hot? I am just noticing the fast idle/choke adjustment is on step 2. |
It was stone cold in this photo. |
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classicbug
Samba Member
Joined: July 10, 2020
Posts: 91
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| Posted: Tue Apr 06, 2021 10:43 am Post subject: Re: Stalls once warmed up |
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| Eric&Barb wrote: |
OK, you do not have the original 36 HP engine. You have a duel port 1600 with Bocar 34PICT-3. Check the idle shut off solenoid is tight and the wiring to it is not failing. Get that wire off the top of the carb, where it will wear thru and short out. That wire should be run below the throttle cable so it is not rubbing against some hard surface.
Do you still have the heat exchangers in place or replaced them with the J-tubes?
Please do post a few more images of the engine a bit farther back to show more of it. |
Thanks, will reroute cable.
Heater exchanges are still there. See additional photos.
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type241
Samba Member
Joined: June 02, 2006
Posts: 972
Location: MOSES LAKE, WA
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| Posted: Tue Apr 06, 2021 12:25 pm Post subject: Re: Stalls once warmed up |
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Just my $.02.
Sounds like you are running rich or the choke is staying closed. When your engine warms up it will naturally richen up thus the choke not being needed when warm. You might want to try re-indexing the choke element. |
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classicbug
Samba Member
Joined: July 10, 2020
Posts: 91
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| Posted: Tue Apr 06, 2021 12:44 pm Post subject: Re: Stalls once warmed up |
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| type241 wrote: |
Just my $.02.
Sounds like you are running rich or the choke is staying closed. When your engine warms up it will naturally richen up thus the choke not being needed when warm. You might want to try re-indexing the choke element. |
Thanks for your $.02. I'll have a look at that. |
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Eric&Barb
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Joined: September 19, 2004
Posts: 24757
Location: Olympia Wash Rinse & Repeat
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toxicavenger70
Samba Member
Joined: July 28, 2019
Posts: 871
Location: CO
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| Posted: Tue Apr 06, 2021 1:28 pm Post subject: Re: Stalls once warmed up |
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| It looks like your fuel pump is not hooked up. Are you using an electric one somewhere else? |
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leowagen
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Joined: October 16, 2018
Posts: 171
Location: Argentina
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| Posted: Tue Apr 06, 2021 3:37 pm Post subject: Re: Stalls once warmed up |
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My two cents. I had a similar issue with my 36 hp. Happened to have fuel starvation due a too high glass bowl filter + poorly installed pump diaprhagm + incorrect pump rod length + incorrect carb bowl height.
Sorted one by one, and ended doind flawlessly ever after... runs great even in hot summer.
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classicbug
Samba Member
Joined: July 10, 2020
Posts: 91
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| Posted: Tue Apr 06, 2021 4:59 pm Post subject: Re: Stalls once warmed up |
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| toxicavenger70 wrote: |
| It looks like your fuel pump is not hooked up. Are you using an electric one somewhere else? |
Yes, there's an electric one installed--not pictured. |
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