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.

 

[saltchuckmatt]

I forgot I had a YouTube channel for when I was working on my 65 C10.
.
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:

Should be popping more.

 

[Berdink]

Should be popping more.

What do you mean?

 

[Berdink]

If I didn't mention it, once I get it running again I'll look it over in the dark for any arcing.

 

[jimmbo]

Should be popping more.

It is running faster than Idle, so it isn't 'popping' much

 

[Berdink]

Yeah, when I first went to look at it to buy it, it ran fine. The videos above are when I first got it home. It ran nice then too. Then I did a seafoam shock treatment, and then it started running rough.
I'll try to get a video of how it runs poorly now.

 

[jimmbo]

Perhaps the SeaFoam(I am one of the 'there are better Snake Oils than SeaFoam' people), fouled the Plugs, I can't remember if you had checked them

Until you get all the missing, damage parts on the Linkage replaced, variations in Timing, and the Carbs-Ignition Sync is likely, and that can make it appear the Engine is running Rough.

 

[cwella]

Yeah, when I first went to look at it to buy it, it ran fine. The videos above are when I first got it home. It ran nice then too. Then I did a seafoam shock treatment, and then it started running rough.
I'll try to get a video of how it runs poorly now.

Thanks for the info. It’s strange that it started running rough after the Sea Foam treatment. A video of how it’s running now will help get a better idea of the issue.

 

[Berdink]

Thanks for the info. It’s strange that it started running rough after the Sea Foam treatment. A video of how it’s running now will help get a better idea of the issue.

I think the seafoam dislodged something.
This second cleaning I may have resolved it - hopefully.
I won't be able put it back together and start it until tomorrow evening.
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I'll video it for how it runs so you guys can hear and maybe better demonstrate the possible issue.

 

[cwella]

I think the seafoam dislodged something.
This second cleaning I may have resolved it - hopefully.
I won't be able put it back together and start it until tomorrow evening.
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I'll video it for how it runs so you guys can hear and maybe better demonstrate the possible issue.

Hopefully that’s done the trick! Sounds like the seafoam may have loosened something up. No rush, put it back together when you get a chance tomorrow evening. A video of it running will definitely help, especially so we can hear the noise and get a better idea of what’s going on. Fingers crossed it’s an easy fix!

 

[Berdink]

Perhaps the SeaFoam(I am one of the 'there are better Snake Oils than SeaFoam' people), fouled the Plugs, I can't remember if you had checked them

Until you get all the missing, damage parts on the Linkage replaced, variations in Timing, and the Carbs-Ignition Sync is likely, and that can make it appear the Engine is running Rough.

I put in new spark plugs since seafoaming.

 

[Berdink]

Perhaps the SeaFoam(I am one of the 'there are better Snake Oils than SeaFoam' people), fouled the Plugs, I can't remember if you had checked them

Until you get all the missing, damage parts on the Linkage replaced, variations in Timing, and the Carbs-Ignition Sync is likely, and that can make it appear the Engine is running Rough.

Yes, but it only started running rough after the seafoam. But yes, I will get those parts on there.