Need help on my 1995 Johnson 115

[Jdl1123]

I have a 115 Johnson 1995 I took it out last weekend and it ran fine I tried turning it on and nothing it wouldn't start
.so I tried giving in some gas and fires up right away but when I let go of the throttle it turns off first I thought it was the neutral control switch and still nothing then I swap out the spark plugs and still nothing can anyone help me out

 

[jakedaawg]

Well, sounds to me like you are saying that the motors turns over with the starter but does not run unless you use the throttle advance?

1. Post model #
2. Visit the sticky and read the how to start my motor thing at the top of the forum (take no offense, many long time boaters find help there)
3. Verify primer/choke works by starting with throttle advance. With it running press and hold key in. Does your motor exhibit a change?
4. Take a fuel sample into a clear jar.
5. Post results of a compression check.
6. With throttle in idle position perform an open air gap spark check with appropriate tester set to 7/16"

 

[Jdl1123]

Check all four cylinders and I have 83,84,83,85

 

[jakedaawg]

Get a different guage that's not chinesium. That's low for sure but could just be a bad guage.

many utoparts stores rent decent guages.


post model number

 

[racerone]

There are 2 different 115 HP models in 1995 --------One an older crossflow and a brand new 60 degree looper style.----So post the model # here !

 

[Jdl1123]

I have a crossflow

 

[Jdl1123]

Could it be the carburetor cuz it turns on when I put it in gear but as soon as I put it on neutral it turns off,

 

[racerone]

I have a few of those.----For rebuilding.----Those compression numbers are awful !----Remove bypass covers to inspect pistons and rings.----Or test with another gauge.

 

[Jdl1123]

That motor was rebuilt like a year ago and I've taken that boat out about 10 times

 

[racerone]

Sorry, I guess I missed that " rebuilt " information in post # 1----Good luck with the motor.

 

[jakedaawg]

As mentioned before...test with a real quality guage, perform spark test with controls in neutral.

did anyone mess with the linkage? Perhaps trying to adjust the idle?

 

[interalian]

That motor was rebuilt like a year ago and I've taken that boat out about 10 times

Do you know what was done during the rebuild? Was it a full rebuild with re-bore, new pistons, rings etc? Or a hone on old bores with new rings on old pistons?