Gas/oil mixture

[mktgw]

I have an old craftsman/sears outboard. I mean old It has the gas tank on top of the motor and you have to turn the motor around 180 degrees for reverse. No idea what year and no user manual. Does any body have a idea what ratio to use for gas and oil??

 

[JB]

Re: Gas/oil mixture

If it is water cooled a 24:1 mix with TC-W3 oil will run about any of them.

If it is air cooled I would go to 16:1 with chainsaw or weedwhacker oil.

 

[CATransplant]

Re: Gas/oil mixture

Hmm....they sold outboards like that up until very recently. That you have to turn it around to reverse it and that it has a built-in gas tank doesn't tell us much.

Look for the model number on a little plate on the transom mount or elsewhere on the engine.

If that's not there, tell us if it's air-cooled or water-cooled. If it's air-cooled the cylinder of the engine will have fins on it.

Sears sold outboards for decades. During that entire period, some of them had gas tanks on the top and had to be turned around to go backwards. In that same time, oil:fuel ratios went from 12:1 to 50:1.

So, we need more information before we can answer your question.

The model number will do it.

 

[mktgw]

Re: Gas/oil mixture

I found the plate with some ID numbers on it. 217 58511 Serial # 400126 I hope this helps Identified it. Does this help with what year it is and the gas/oil ratio??

 

[CATransplant]

Re: Gas/oil mixture

OK, there you go. That's a 1969 3.6 hp outboard, made by Eska. It has a Tecumseh powerhead.

The fuelil ratio should be 16:1, using the type of oil used in chainsaws, not outboard oil. It's an air-cooled engine.

You can go to www3.sears.com, insert the model number like this: 217.58511

You'll then be able to see parts diagrams and parts lists. Sears may have some parts for this engine, but your best bet for most things is certifiedpartscorp.com. Call the number you find there and give them the model number of your engine. They have most things. If you have the part number from the Sears web site, that will speed things along.

Sears doesn't list what spark plug that engine uses, I'm afraid.

 

[mktgw]

Re: Gas/oil mixture

Thanks for the info, You guys are great.