2002 Foreman Fourtrax won't take throttle

901 Views 7 Replies 7 Participants Last post by LedFTed, Jul 4, 2019

rcsmith270

Discussion Starter · Jun 8, 2019

I have a 2002 400 with a new carb and a new petcock. starts fine and idles great. It won't take throttle to rev after start unless it idles a while. Carb screw is out 2 1/4 like manual says. Acts like it's not getting a sufficient supply of gas. Fuel line was replaced by a guy that worked on it. Don't get it.

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Manny

· #5 · Jun 11, 2019

Sounds to me like you've either got a leak on the top of the diaphragm cover from improper assembly or a pinhole in the rubber diaphragm itself.

In order for a CV style carburetor to rev up it must be able to create vacuum and lift the slide/diaphragm assembly.

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