carb problems i think

[leej]

I have a 1991 force 120....I have been trouble shooting it a while and send every time I fix something another thing goes wrong....my other thread is entitled force 120 number 1 cylinder not firing.....I put a new main nozzle in cuz one of mine came out and was broke....I did a total rebuild except needle and seat due to the looked great.....my floats were out of adjustment so I adjusted them just under 11/32....now the boat will not stay running once above idle...and when I prime it the bulb will not get hard now and full will leak from carbs....do I have the floats set to high not able to shut the fuel off....I have also replaced fuel pump diaphragm and new gas lines with new water separater ....please help I feel like I amchasing my tail on this one

 

[Jiggz]

Re: carb problems i think

You need to verify the needle valve and its seat making sure it closes at correct level with the float. Have you installed a clear fuel filter between the fuel pump and carb intake? It is the best $5 upgrade you can do which will make you troubleshooting very easy. The primer bulb doesn't necessarily need to get hard instead it could just be a little firm to indicate the floats has pushed the needle valve to against its seat. I say install the clear filter first to see if the fuel pump is not pumping enough fuel due to suction leaks or if the carbs needs adjustment.

 

[jerryjerry05]

Re: carb problems i think

If your squezzin the bulb and it's running out of the carbs???
The carbs are upside down or the floats not adjusted or the needle/seat has something blocking it??
You have the manual?
Even the Clymer manual covers the float settings.
They must be set level when inverted.
The drop when right side up.Is almost touching the post.
Like Jiggs suggested, a filter between the carb and the pump is a MUST!!!
Wally World, G-2 or G-12.