Problem starting johnson 50hp 1996

[janul15]

I have had a problem starting the above engine- not starting at all at the moment. Turns over well, compression good, spark is present. Checked spark plugs after trying to start- they are soaked with fuel. Small leak noted at primer valve. Could a faulty primer valve/ primer solenoid cause a non start ?

 

[racerone]

Check flywheel key.

 

[tphoyt]

Is the primer valve in manual position by chance?

 

[janul15]

Flywheel key checked recently, but I will check again. The primer valve is in the correct running position.

 

[racerone]

You are raising fast idle lever ?-----Pushing key in WHILE cranking it over ?----Load test battery ( even if new ) and take starter apart for inspection.----Steps to take and no money spent.

 

[ahicks]

I had one of these for a while, and had a terrible time with flooding on cold starts at first. I learned to never choke for more than a 3 count at a time. What worked best for me was squeezing the primer bulb till firm, go to console, push the ign. key in for a 3 count, then attempt to start - which generally happened right away.

When that valve is open, fuel just roars into the intake.....

 

[racerone]

No the holes in the nipples are very small.------And fuel only flows if there is fuel pressure ( motor cranking ) to this simple valve.----Impossible to flood these motors with the wonderful primer valve.

 

[ahicks]

We're victims of our experience right? If the primer bulb is squeezed to firm, the fuel system has plenty of pressure to squirt fuel when that valve is opened.

 

[janul15]

Thanks for your replies. Racerone, I still haven't checked the flywheel key this time around. Maybe that's the most fundamental check. Must get hold of a flywheel puller , again. Update; tried starting when spraying in easy start. Some success, fired up shortly, a few times, but I noticed a misfire, not every time. Would not fire up on fuel.

 

[ahicks]

Thanks for your replies. Racerone, I still haven't checked the flywheel key this time around. Maybe that's the most fundamental check. Must get hold of a flywheel puller , again. Update; tried starting when spraying in easy start. Some success, fired up shortly, a few times, but I noticed a misfire, not every time. Would not fire up on fuel.

Maybe time for a fresh set of plugs?

 

[racerone]

The primer hose and orifice in the nipple are too small to allow fuel to " roar " into this motor.---------Good luck with this motor.

 

[janul15]

Took off the flywheel, and yes, the key was sheared. Replaced with a factory key, replaced the flywheel, tightened the nut as tight as I could. I'll try and start up the engine tomorrow.

 

[racerone]

Flywheel and crank tapers need to be clean and dry.----Must match properly.------Torque the nut.----Post # 2 was not far off I guess.