Sputtering Johnson V4 90hp - 1994

[saltchuckmatt]

I sure don't like the suggestion some gave to drill a small hole to get it. I don't like the idea of possible metal shavings.
Another guy said the plug is soft enough to use a Sheetrock screw.
I'll do some more searching on ideas how to remove it.

Put a pretty good size blob of grease on your bit...shavings stick to that.

 

[jimmbo]

I sure don't like the suggestion some gave to drill a small hole to get it. I don't like the idea of possible metal shavings.
Another guy said the plug is soft enough to use a Sheetrock screw.
I'll do some more searching on ideas how to remove it.

I think a Sheetrock screw would pose a greater Threat, as once it get a bite it is going forward.
As for metal shavings, you are removing it to clear out Gum, Varnish, and Dirt, so a few Metal Shavings are likely larger than any of the Dirt in there.
That Crank Seal looks nice and dry

 

[Berdink]

They were nice and clean under there.

 

[Berdink]

This time I took out the 2 small jets in the two outer small holes in the fuel bowl. They looked clean, but I still ran a small wire through the jets and blew through them and the holes with carb cleaner. Every hole I blew through, I made sure cleaner was blowing out the other side. I also made extra effort to blow the direction the fuel would be flowing.
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I don't know. I'll try to put it all back together tomorrow evening and and give it another try.
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Oh, just to give myself a warm fuzzy feeling and having ran it some more, I'll do another compression test while the carburetors are off.
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Done tinkering on it for today.
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Thanks to all who have helped me.
I'll post back how it goes.
I won't stop posting back here until this is resolved.

 

[Berdink]

I forgot I had a YouTube channel for when I was working on my 65 C10.
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Here is a video of the Johnson running when I first got it home last week before I did seafoam - before it started running rough:

 

[jimmbo]

That is Good News, as very often those wells are full of the things I mentioned earlier.
Verify the Float Level while it's apart.
A closed Carb has no effect on a 2 Strokes Compression numbers as Air can enter the Combustion Chamber via the Exhaust Ports. 4 Strokes are a different Animal
Running a bit fast for Idle, but sounds okay

 

[Berdink]

Here is the same time as the video above - when I first got it home and before seafoam.

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I'll see if I can get a video Wednesday for how it's running now.

 

[racerone]

Looks like the roller is missing the outer cover.----Roller is in the horse shoe shaped slot.

 

[Berdink]

Looks like the roller is missing the outer cover.----Roller is in the horse shoe shaped slot.

Good eye!
Yes, I have that in my cart for next order - along with the roller on the upper linkage.