73 johnson 50hp no start?

[psacobie]

OK where to start . I have strange problem for me anyway I can only get it to start i take a plug out and squirt fuel into a cylinder after that will run fine. I just replaced the gasket for the fuel filter (cause of soft primer bulb) new plugs and coils as well (rotten wires) I set the gap .030 . Service manual has been ordered . Any ideas where to look next ?

 

[Daviet]

Re: 73 johnson 50hp no start?

Sounds like a carb problem, not getting fuel to the cylinder.
How is the compression?
Which cylinder?

 

[psacobie]

Re: 73 johnson 50hp no start?

Don't know about the compression I don't have a tester I need to borrow one, either cylinder. my brother who had the motor b4 me had the carbs serviced 2 years ago so I didn't think they would be the problem . outboards are new to me so I was waiting for the service manual b4 I got to far over my head . I knew how to get covers of the carbs i would hit it with carb cleaner

 

[Daviet]

Re: 73 johnson 50hp no start?

Just squirting carb cleaner into the carb woun't do any good, need to pull carbs apart to clean properly.
Is the choke working properly?

 

[psacobie]

Re: 73 johnson 50hp no start?

seems too be . everything moves when you engauge it

 

[Daviet]

Re: 73 johnson 50hp no start?

It takes compression, spark and fuel to run your engine.
You need to check these things first when trouble shooting your engine.

 

[psacobie]

Re: 73 johnson 50hp no start?

I waiting on the compression tester, spark is good . before I squirted fuel in cylinders they were getting fuel when I pulled the plug I could see & smell the gas on the plug . it was running last summer and was winterized properly so I'm lean towards a choke issue will see after compression test

 

[psacobie]

Re: 73 johnson 50hp no start?

its alive . a loose spark plug boot . keep it simple stupid