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Post by 47cj2a on Mar 8, 2020 21:01:44 GMT -5
im ready to pull my hair out over this... the metering rod and/or "choke-throttle rod" will not adjust correctly. motor starts, good. plugs are a good color. if i DO adjust the choke-throttle rod correctly, it starts, runs, and drives great. no throttle lag or anything. good power. BUT when i shut the engine off, it pukes gas and washes out the carb and cylinders!! if i adjust the choke-throttle rod so it does NOT puke fuel all over itself at shut-off, it runs like shit and dies when you crack the throttle. how do i fix this? the metering rod is clearly not seating in the jet correctly!!! Pic of current set up
any help is greatly appreciated
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Post by Scoutpilot on Mar 9, 2020 6:34:59 GMT -5
I see a pressure regulator. Does the mechanical pump work? Is there an electric pump? What is the fuel pressure?
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Post by 47cj2a on Mar 10, 2020 22:08:59 GMT -5
2psi mechanical pump runs good
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Post by Scoutpilot on Mar 11, 2020 3:53:35 GMT -5
Two PSI by a pressure gauge or is that the setting on the regulator? I don't trust regulators any further than I can throw them.
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Post by 47cj2a on Mar 11, 2020 19:47:07 GMT -5
well assuming it is over-pressurized.... what can i do to stop that? switch to an electric pump?
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Post by Scoutpilot on Mar 12, 2020 4:11:34 GMT -5
Delete the electric pump and use a mechanical pump for that motor. If the electric turns on and off with the key it can overpressurize the carb.
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Post by 47cj2a on Mar 12, 2020 13:25:55 GMT -5
no, i DO i have a mechanical pump right now. if you look closely in the pic you can see it.
line from the tank, into the filter, into the mechanical fuel pump, then through the fuel pressure knob, to the carb.
even though the fuel pressure knob is set at 2psi that still seems to be too much and its pushing gas out of the carb after driving & shut off.
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Post by Scoutpilot on Mar 12, 2020 13:34:51 GMT -5
Delete the regulator. It's not necessary. If it is still too high, get and install a thin spacer.
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Post by 47cj2a on Mar 13, 2020 13:13:03 GMT -5
a spacer.... for the carb-intake gasket?
also the float shut off seems to be working well. if i undo the fuel hose AT the carb there is fuel pressure there at shut off, because fuel squirts out from the line, when i loosen the line's hose clamp and pull the line off.
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Post by Scoutpilot on Mar 13, 2020 13:45:13 GMT -5
a spacer.... for the carb-intake gasket? also the float shut off seems to be working well. if i undo the fuel hose AT the carb there is fuel pressure there at shut off, because fuel squirts out from the line, when i loosen the line's hose clamp and pull the line off. Sorry. I was in a hurry. I meant a spacer for the fuel pump. A good carb will maintain some fuel pressure for a time.
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Post by 47cj2a on Mar 16, 2020 23:34:58 GMT -5
ive never heard of a fuel pump spacer... does that knock down the fuel pressure? is there a way to relive pressure at the carb itself ?
i have the fuel pump without the glass bowl. does that make a difference ?
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Post by Scoutpilot on Mar 17, 2020 5:25:28 GMT -5
ive never heard of a fuel pump spacer... does that knock down the fuel pressure? YES. Look here
is there a way to relive pressure at the carb itself ? NO.i have the fuel pump without the glass bowl. does that make a difference ?
NO. Can't tell from photo. Is it a single action (fuel only) or dual action (fuel and vacuum)?
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Post by 47cj2a on Mar 17, 2020 16:00:08 GMT -5
its a regular single action
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Post by Scoutpilot on Mar 17, 2020 16:17:09 GMT -5
1/4" fuel tube = Approximately 4 PSI 5/16" fuel tube = Approximately 2 PSI 3/8" fuel tube = Approximately 1 PSI
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Post by 47cj2a on Mar 20, 2020 9:57:26 GMT -5
it is definitely the fuel pump holding pressure. i will start a new thread for this topic. thanks!
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