[fishhawk]

got 25 johnson the problem I'm having is one minute it'll run fine then i'll stop to fish and when I start again and take off sometimes the motor will miss really bad. If I let off the gas and then hit it again it may take off fine or start missing. I may have to do this a couple time before it take off good and runs fine. I have cleaned the carbs twice and put a rebuilt kit in it. If the carb was dirty wouldn't the motor miss all the time?

 

[Brett]

Small amount of water in fuel?
Air leak in the fuel system?
Old fuel pump diaphragm?
Check valve in the fuel line not working? (allowing siphoning to take place)

 

[topnative2]

ck fuel/water seperator
blow out fuel line
if a permanent tank ck overflow line for clogging

 

[fishhawk]

Ran the boat today, with nothing changed except the motor I put a 20hp yamaha on the boat to see what would happen. The motor ran good even with the 50 to 1 mixtrue.

 

[topnative2]

so now we know the problem is inside thd motor--carb is the first step ck it again---dump the bowl---then do Brett's stuff

 

[Gramps]

Did you use a different fuel connector? I had a bad one for my Mercury, it acted very similar. Ask MATT he almost had to tow me through the Ft. Pierce turning basin

 

[fishhawk]

Thanks guys, I'm going to try some of the things mentioned

 

[Peter2006]

Check the stator and timer base wires for chafing. they move when you throttle up. Could also be a bad ground between the ignition coils and cylinder head bosses.
Didn't say what year you had so I'm thinking it's a CD Ignition not points.

 

[fishhawk]

It's a 05 johnson