1960 Johnson sea king 40hp fuel/oil in test bucket.

[pudlejumper]

The symptom I’m dealing with is mud butt fuel and oil in my test bucket.
Things I’m sure of (tested)
Float is not stuck, both cylinders have compression and are firing.
The motor starts right up and runs pretty good.
I just ran some sea foam through it as per how every video said to de carbon it.
Also no fuel or oil is coming out of the “spitter”
Plugs aren’t foaled.

The only thing I can think of is that the 20:1 oil fuel ratio I have researched for this old of a motor is too oil saturated at idle?
I , A)don’t want to put the gross slushy at the end of a 15 minute idle into the lakes I plan on boating
B) really don’t want to blow up my motor cutting back on oil on a hunch.

Another thought I had was if it’s just because it’s not under a load? I’ve read it’s common for some unburnt oil to end up in the exhaust but I find this excessive. I’ll try to load a picture of what a typical warm up yields.
Thanks in advance for any advice.

 

[pudlejumper]

The symptom I’m dealing with is mud butt fuel and oil in my test bucket.
Things I’m sure of (tested)
Float is not stuck, both cylinders have compression and are firing.
The motor starts right up and runs pretty good.
I just ran some sea foam through it as per how every video said to de carbon it.
Also no fuel or oil is coming out of the “spitter”
Plugs aren’t foaled.

The only thing I can think of is that the 20:1 oil fuel ratio I have researched for this old of a motor is too oil saturated at idle?
I , A)don’t want to put the gross slushy at the end of a 15 minute idle into the lakes I plan on boating
B) really don’t want to blow up my motor cutting back on oil on a hunch.

Another thought I had was if it’s just because it’s not under a load? I’ve read it’s common for some unburnt oil to end up in the exhaust but I find this excessive. I’ll try to load a picture of what a typical warm up yields.
Thanks in advance for any advice.
Also to be noted. It’s is not lower unit oil.

 

[pudlejumper]

Sorry for repeat post I was trying to add that it’s not lower unit gear oil.

 

[Crosbyman]

normal 2 stroke sludge

use the lake to spread it out and you won't see it :-(

 

[tphoyt]

Agreed

 

[racerone]

Ran at 24:1 in those days.-----And yes that is normal for that vintage motor.---Yes some gas and oil goes right through a conventional 2 stroke and is wasted.-----There may be things that can be modified to reduce the sludge.-----Not quick and easy.-----

 

[pudlejumper]

Dang ok, I’ve read up a little bit on using synthetic oils that will smoke less and have higher flashpoints and added bonus are biodegradable. The Lucas oil looked promising but isn’t suitable for anything 32:1 and lower, so, any ideas on which synthetic oil I can run that’s fairly affordable? Quicksilver synthetic blend maybe?

 

[pudlejumper]

Ok also, I read in the original owners manual that it’s supposed to have a high speed adjust on the carb. I don’t have one. Just a hole to no where which no signs of anything being mounted there? My only thought is that it may be a older model rebuild from before my time? Pic for reference.

 

[pudlejumper]

Pretty sure I’m missing the whole high speed adjust assembly and someone just capped the jet. Ugghhhhh

 

[racerone]

Post a picture of the bottom of the float bowl.---These are elegantly simple motors .----That if you have some patience to learn how to maintain them.-----Do a complete evaluation of this motor before spending any beer tokens on parts !

 

[pudlejumper]

I left the house but I can say for certain that there is no high speed needle valve in the bottom. Just a solid brass bolt and a washer. Not too certain if you can just delete the adjust valve, to me this would be a very rich wide open high speed jet?

 

[racerone]

Slow down with your assumptions and guessing.-----I think I should step aside now.----I think a new ---" Push the button to start "-----Might be your best option here.

 

[pudlejumper]

I’m not going to waste my time explaining my experience with classic motors. I just hope you have been diagnosed autistic to explain your attacking behavior. Glad you think you got it all figured out.

 

[racerone]

Well-----You seem confused by this simple carburetor !-----You might well be on your own working on this classic motor.

 

[pudlejumper]

Might be better off that way. Bonjour troll

 

[racerone]

The hole beside the low speed mixture needle might be the vent for the carburetor bowl.----The high speed mixture needle / jet is found in the bottom of the carburetor bowl.

 

[pudlejumper]

Ok super nice guy. Home again. Here you go. No adjuster. Just me being a mega dumb dumb you need to belittle

 

[pudlejumper]

Whoops used wrong finger

 

[racerone]

There you go , the fixed high speed jet is way inside behind that drain plug.-----3/16" diameter shank screwdriver may take it out.----Some one has installed a newer carburetor or carburetor bowl on your wonderfully simple motor !!------Some say ----" when the student is willing a teacher might show up "-

 

[Fun Times]

Please keep the personal back-and-forth bickering out of the conversation…
Thank you
Iboats Mod team.