Fuel issue

rob 135

Petty Officer 2nd Class
Joined
Aug 8, 2013
Messages
167
Had boat out today ,73 135hp Johnson. Starts ok . Problem I was having is after sitting for awhile fishing then restarting engine would start and die couple times ,even with fast idle lever up. Then once started if you tried to go would stall and need to choke to restart. Then it would be fine. If u tried starting immediately after shutdown starts every time. . Any ideas?
 

rob 135

Petty Officer 2nd Class
Joined
Aug 8, 2013
Messages
167
Re: Fuel issue

It idles fine . Seems to me like fuel pump . Seems to run on gas in fuel bowl then die . Then I choke and crank for bit and it fires up and running good. I did notice fuel bulb goes soft a lot and needs to be pumped often. Also when I give it throttle will almost die gotta go very slow and then it finally takes it. If you go quickly it stalls .. I synced carb again haven't tried yet.
 

rob 135

Petty Officer 2nd Class
Joined
Aug 8, 2013
Messages
167
Re: Fuel issue

I pulled plugs when I got home and they were wet . Has Ngk plugs should I put champions back in. Motor not much on chugging along . Likes to go not putt around .
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,135
Re: Fuel issue

Your primer bulb shouldnt go soft a lot. CHeck with engine off it holds firm- ie no leaks
 

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: Fuel issue

The only time the fuel hose bulb should get hard is when you first pump it up for a cold start each day. Once the fuel pump starts to draw fuel through the lines, the bulb will soften, but it should not collapse when running. That's normal. You can do a test. After shutting down for a longer period, try priming the fuel hose bulb. If it starts and runs fine, the engine could be losing it's prime. If it runs on a built-in tank, could be the anti-siphon valve may not be functioning properly or the ball valves in the hose bulb could be malfunctioning. You could also try another hose. Agree, check for fuel line leaks. Any fuel leaking out will let air back in the lines, which could lead to fuel draining back into the tank. (as well as a lean-running condition.)
 
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