1993 30hp Johnson - acceleration cut out

[Kierank1999]

Hi guys!

just in a bit of a mess, so 5 months ago I had my boat out over Christmas and it didn’t miss a beat, yesterday for the first time since then I took it to the lake and as I drifted out of the boat ramp I tried accelerating and the engine cut out...

I assumed it could be from dirty fuel or water in the fuel as we did have heavy rain fall at the start of the year, so I went and bought a new tank, new fuel, and fuel line to the motor just in case water was getting in... I disconnected the fuel altogether and let the engine run dry before trying the new tank but it never fixed the issue...

I then replaced both spark plugs, and did a compression test while at it and both cylinders came back at 125... I’ve read multiple pages and obviously getting different ideas of what it could be... some saying they had a similar problem which was a main earth? I think ive check the earths and I cannot see any issue (good connection and clean- if I’m looking at the right ones) and also a temp sensor? I see that runs into the head and would need to pull that off to get at it?

I made a video if anyone wouldn’t mind taking a look and giving an opinion on the issue... maybe I can send you a carton of beer!

I will take it to a mechanic, but just trying my luck before I do that!
Much love
Kieran

 

[Kierank1999]

By the way, model number of the outboard is

1993 Johnson J30ELETA 30hp​

 

[Crosbyman]

seems to be starving for fuel as it accelerates. have you tried cleaning the carb or running an engine cleaner product in the fuel . Some like Seafoam some don't..
doesn't take much to clog a carb hs orifice. at least...try a blast of carb cleaner .

try pumping the fuel bulb to see if it affects performance when it starts to sputter and die. if it clears up then you know fuel delivery is an issue

 

[racerone]

Revving a motor on a hose is not a good idea.----Carburetor is too lean.-----Open up low speed mixture 1/2 turn.-----Or throttle plate is opening to early.---Does spark jump a gap of 3/8" or more.----Motors need a new impeller every 5 years for peace of mind.

 

[oldboat1]

Sounds like blocked h.s. jet, like Crosbyman suggests.

 

[Kierank1999]

Thanks guys, not too confident in pulling a carby apart to clean jets... may just leave it for a mechanic?

 

[Crosbyman]

no need to pull the carb...

just unscrew the bolt.#12 . find a fine wire 26 ga or 2 -4pound monofilament should do and ream out the crud in the hs jet and blow in some carb cleaner followed by a blast of air (if you have no compressor use a can of keyboard air can at the dollar store ($4) or a computer shop