1987 140 hp johnson

[twiggy1981]

i have a 140 hp v4 johnson i rebuilt the carbs got good comp. the bowls are full of gas it starts and rund really rough then dies after a min. or two every once in a while it revs up but usually as soon as you speed up the throttle it dies also there is alot of gas leaking out the exaust

 

[Solittle]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

Your description points to a carb problem. How (in detail) did you rebuild the carbs?

 

[twiggy1981]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

i have a 140 hp v4 johnson i rebuilt the carbs got good comp. the bowls are full of gas it starts and rund really rough then dies after a min. or two every once in a while it revs up but usually as soon as you speed up the throttle it dies also there is alot of gas leaking out the exaust

complete gasket kit with needle valve and seat

 

[boobie]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

I hate to tell you this but maybe you should re-check your carb work. Are the floats set properly ? Do you have any pinched fuel lines or air leaks ? Really sounds like a fuel prob.

 

[wired247]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

Sounds like your float levels are off a bit. Too much fuel in the bowls.

 

[twiggy1981]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

Sounds like your float levels are off a bit. Too much fuel in the bowls.

i checked it but i noticed when i was draining them one had a lil less gas than the other three but not much but it was running the exact same before i rebuilt the carbs

 

[wired247]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

did you set the floats level or with the edge of the float higher than the backside. Level and they'll flood if you look at them wrong.

 

[twiggy1981]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

not i didnt think about that im going too pull them back off and check it but it was running like that before i re done them

 

[kenmyfam]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

How's the spark ???

 

[twiggy1981]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

good it started twice before i did the carbs and ran good for a min and once since i did the carbs it started and reved up good and then died but all four have fire

 

[kenmyfam]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

You have been given some good advice from the other guys so far. I read about you saying there is a lot of gas coming from the exhaust ?? however just for the heck of it have you checked the fuel pump output ?? It's quick and easy and how about the gas itself ???? is it old ???

 

[twiggy1981]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

the fuel pump puts out a good bit of fuel when u turn the motor over and the fuel was put in the tank a week ago

 

[archcycle]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

Do you have the OMC (not seloc or other) model year specific factory service manual for the motor? If not you should ebay one. It sounds like your carb linkages need to be synchronized. If you've got one set of butterflies closed while another is opening you'd run into problems with one side running super rich and one side leaned out.

Idle timing?

 

[twiggy1981]

Re: 1987 140 hp johynson

Re: 1987 140 hp johynson

that something im going to check out in the morning thanks every ne its all been god advice ill let yall know what i discover tomorrow

 

[Faztbullet]

START A NEW POST!!!!!!!!!