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brianbernal71
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Joined: January 10, 2010
Posts: 41
Location: Spokane WA
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 Posted: Mon Feb 27, 2012 5:59 pm Post subject: angled fuel pump on generator motor? |
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hey all, i have been reading in the archives, but have not found an answer to my question. so sorry if its a rookie type of question. i have a new angled fuel pump intended for an alternator motor. can i install it on a motor that has a generator? which length rod would i use if so? thanks...brian
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Brian
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 55654
Location: Long Island, New York, USA
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| Posted: Mon Feb 27, 2012 6:05 pm Post subject: |
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Yes you can and you use 113 127 307 A pushrod (108mm).
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Last edited by Glenn on Mon Feb 27, 2012 6:06 pm; edited 1 time in total |
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poisonbeetleman
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Joined: February 25, 2012
Posts: 93
Location: FT.Bragg NC
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| Posted: Mon Feb 27, 2012 6:05 pm Post subject: |
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| when i installed my new altenator. with the new stand. i used the new angled pump but the old rod. ran fine. unless someone knows . something else. but this worked fine for me. hardest part for me was the rewire of the regulator. so no wires would ever touch metal. heat shirnked all of them. nvr had a problem. |
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brianbernal71
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Joined: January 10, 2010
Posts: 41
Location: Spokane WA
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| Posted: Mon Feb 27, 2012 6:14 pm Post subject: |
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so what would happen? what actually does the length of the rod do to the pump? if its longer does it pump more fuel?
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poisonbeetleman
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Joined: February 25, 2012
Posts: 93
Location: FT.Bragg NC
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| Posted: Mon Feb 27, 2012 6:19 pm Post subject: |
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| ok if the rod is longer then the travel of the pump would increase, meaning more suction = more fuel= more fuel pressure= bad things to carb. most bugs from what i have read . run 2-3 pounds of fuel pressure. more fuel and more pressure = to much gas for little bug. |
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Joel
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Joined: September 04, 2006
Posts: 7972
Location: NSW Australia
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| Posted: Mon Feb 27, 2012 6:43 pm Post subject: |
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The rocker arm inside the base of the pump is just mounted lower on alternator pumps so they need a shorter rod.
If you use a short alt rod with a gen pump it's not gonna reach so pump wont work
If you use a long gen rod with a alt pump its gonna be too long and break shit if you can actually get it to bolt down ( the rod holds the pump up to high)
It's easy to tell which pump is what as some aftermarket ones dont lean over but use the short rod.
pumps that use the shorter 100mm rod have the rocker arm hanging out the bottom, pumps that need the longer 108mm rod have the rocker arm up inside the base of the pump like so:
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ashman40
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Joined: February 16, 2007
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Location: (West) Tokyo, Japan
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| Posted: Mon Feb 27, 2012 7:35 pm Post subject: |
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| poisonbeetleman wrote: | | when i installed my new altenator. with the new stand. i used the new angled pump but the old rod. ran fine. |
I have seen for sale an angled generator pump that outwardly appears to be an alternator pump. It uses the longer pushrod.
Don't just go by whether it is angled or not. Look at the pump foot like the above pic. Make sure to match the pump and push rod.
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mrbigmax
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Joined: September 10, 2011
Posts: 1055
Location: Modesto, CA
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| Posted: Mon Feb 27, 2012 8:37 pm Post subject: |
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| For goodness sake, we are talking about a $5 part here. Get the right part and don't worry about excessive fuel pressure or worn out pumps or worn out pushrods... |
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Chris Vellat
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Joined: April 09, 2004
Posts: 1569
Location: Seattle, WA
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| Posted: Mon Feb 27, 2012 9:41 pm Post subject: |
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An alternator pump pushrod can always be made into a generator one with a couple minutes and a grinder...Also note a common problem with reproduction fuel pumps is the lack of retaining hardware on the pivot pin - letting the pin fall-out and the engine left to run-out of gas.
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Greezy Joe
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| Posted: Tue Feb 28, 2012 5:54 am Post subject: |
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| Chris Vellat wrote: | | An alternator pump pushrod can always be made FROM a generator one with a couple minutes and a grinder...Also note a common problem with reproduction fuel pumps is the lack of retaining hardware on the pivot pin - letting the pin fall-out and the engine left to run-out of gas. |
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