86' 28HP Johnson died, need troubleshooting help.

[john7bon]

1986 28HP Johnson

I was running the motor in reverse at idle when it just up and quit. I ran the battery down trying to restart it with no luck. It fired twice for maybe a half second.

Pulled the carb fuel intake saw that fuel was flowing to the carb fine.

Removed carb, blew on the intake nozzle and determined it was clogged. The primer nozzle atop the carb was clogged as well.

Cleaned the carb out with carb cleaner and replaced all of the parts that came with the carb rebuild kit. Air is flowing thru both nozzles very well now.

After hooking the motor back up to the boat, I can?t get the flipping thing started. I can get it to run for about 2 seconds if I pull the plugs and spray some lubricated starting fluid in each cylinder.

I didn?t take note of the low speed needle location when I disassembled the carb, so I?ve been trying various locations still with no luck. Closed needle valve all the way, and opened ? turn, attempt to start, open another half turn etc? I would think that the engine would at least start, even if the needle valve is not in the ?proper? location, no?

Another odd thing. If I spray starting fluid in the carb it doesn?t start? Only when I remove the plugs and spray directly in the cylinder.

Any suggestions?

Thanks,

-JB

 

[tashasdaddy]

Re: 86' 28HP Johnson died, need troubleshooting help.

check you spark on both. needle valve 1 1/2 turns out from softly seated.

 

[john7bon]

Re: 86' 28HP Johnson died, need troubleshooting help.

Hmm, I didn't touch the fuel system. I wonder if whatever clogged up the carb is still floating around in the tank or fuel lines, and immediately clogged the carb again. How can I check to see that the carb is actually drawing fuel when the engine cranks?

 

[john7bon]

Re: 86' 28HP Johnson died, need troubleshooting help.

I'm back to the forum today with another problem on a different engine, so I thought I'd update this post for inquiring minds.

After replaceing a bunch of crap that I didn't need to, and hauling this beast up and down a 100 yard hill (twice), it wound up being a faulty "man-overboard" switch (or whatever you call those lanyard things you're supposed to attach to yourself while underway but never do because your boat is so slow).

GRRRR.

 

[HybridMX6]

Re: 86' 28HP Johnson died, need troubleshooting help.

LoL, you're not the 1st to be bit by that bug, and surely won't be the last.