? Identify this 1 cylinder 4 stroke engine that requires 50:1 fuel/oil mix?

[docrocky]

This engine is used on an older EZ rake or Trac vac. I do not know if it is a replacement engine or not. there are no markings on it except the pull cord has SSK and NOK on the handle. I am concerned because the gas cap is marked with a fuel to oil mix of 50:1. The air filter is by a Japanese firm: KOUKENSHA. It has oil ports on the bottom of the engine. I inadvertantly have been running it on regular fuel and then I noted the marking on the top of the fuel cap!!!! I am afraid to ignore or use the 50:1 ration mix.

Any info would be helpful....

Thanks...rockydocky

 

[CalG]

Someone replaced the fuel tank filler cap with an inappropriately marked piece.

The engine is a four stroke with oil in the crank case that full fills all lubrication requirements.

But don't forget.. " engines run better and last longer with Marvel Mystery oil in every fill up!"

 

[Fawken]

what Calg said. Cap looks plastic and the original cap was metal. Good engine though.

 

[MossRoad]

Yep, some goomer put a two-stroke fuel cap on a four-stroke fuel tank! Reminds me of people that converted those early GM diesels to gas engines but left the diesel stickers on the fuel filler.

 

[grm61]

Do you see a place to add oil??

I don't know about your engine, but I have a Still FS 90, 4 stroke weed wacker that requires a 50 to one mix. They call their motor a 4 mix.
It has valves just like a four stroke but holds no crankcase oil.

 

[MossRoad]

Do you see a place to add oil??

I don't know about your engine, but I have a Still FS 90, 4 stroke weed wacker that requires a 50 to one mix. They call their motor a 4 mix.
It has valves just like a four stroke but holds no crankcase oil.

No kidding? Never heard of that. I (and I'm sure many others), would like to see a thread and pics of that. Sounds interesting.

 

[docrocky]

Gentlemen: thank you for the quick responses. BUT....the gas tank is plastic and match for the plastic gas cap. Have you encountered a Briggs/S or Tecumseh that has a Japanese air filter? Could this be a Japanese engine? The SKK on the pull start matches a Japanese motor bike company but i could't find any 1 cylinder engines on their web site. The small filter that fits into the top of the gas tank is also unusual to what I have ever seen with B&S or Tecumseh. Any clues here?
Oh, the challenges of the day, week, month and year.

 

[Egon]

Pull the plug and check compression to tell if it is a two cycle.

There are larger two cycle engines that have a separate crankcase.

 

[Barry 1]

I have an old Kawasaki FA210D that has the same muffler and red switch,but the carb and tank are like an old 5hp Briggs.The motor looks the same otherwise.

 

[murphy1244]

Pull the muffler and see if there is a valve behind it. I think it is a two stroke myself.