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Stupid me!!!! Last fall I took carbs off to rebuild. Thats not a problem.... Then I decided I would replace fuel lines and vacuum lines. I marked the check valve that goes to the accelerator pump thats behind carb 4 and now I am not sure which way it goes. Should have written down which way the mark was. To long between fall and spring for old guy to remember. Please help.....
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whats even dumber?? my computer.
it wont even tell me what motor you're disscussing. -
Sorry about that.. The motor is a 80 hp Yamaha..4 stroke.. 2001...Maybe that will help your computer.. My problem, among the many, is my mind.Comment
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I believe he was shooting for a Model # just to make sure you are correct on the year among other thingsComment
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I know the mind thing.
crystal ball broke,magic wand is missing only thing left is my mind and it wanders.
I cant remember the check valve orintation out of memory.
its part of the acceleration enrichment system.
I dont have the manual here at the house.Comment
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well as I was sitting here thinking,a wee bit to early for drinking.
the bottom carb,#4, should have two small fittings on the inboard side.
1 horizontal and the other pointed up at about 45*.
now a bit about how the system works.
at rapid acceleration the engine needs additional fuel.
this is accomplished via the diaphram assy mounted on the intake and connected to #4 carb.
when the diaphram is pushed it forces air into the 4 lines.
this raises the air pressure inside the float chamber increasing the air/fuel ratio.
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so back to check valves.
the inline valve arrow will point to the 45* fittings on the carbs.
the #4 carb horizontal fitting is actually another one way valve.
the horizontal fitting line will wrap back around to the inlet/diaphram side of the inline check valve.
this allow air back into the diaphram without pulling fuel from the bowl.Comment
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Thanks for explanation, that helped a lot. Hopefully the carb rebuilts and new fuel pumps helps with my RPM issue... Thanks again...Comment
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