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

Mysfyt · May 23, 2015

Up until I saw the carburetor, I was going to say 5 hp Briggs also. That doesn't look like a Briggs carb. Maybe a Frankenstein?

jim44 · May 23, 2015

My Stihl chainsaw is a 4 cycle that requires a 50:1 mix. Never have seen such as an engine that large, though.

Fawken · May 23, 2015

The engine is Japanese made by Honda for the company who makes the vacuum. The fuel tank (if plastic) has been replaced.

seaneastok · May 23, 2015

The crankcase on your engine is oil filled according to the sticker regarding oil weights and levels. No mix needed.
Regards
Sean

grm61 · May 23, 2015

MossRoad said:
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.

Here ya go....I like mine. 4-MIX engine ? lightweight and with good lugging power | STIHL

rswyan · May 23, 2015

MossRoad said:
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.

Moss,

I have a Stihl pole pruner ... uses the same type of engine (4 mix) ... apparently it's something they came up with to reduce engine emissions and pollution.

seaneastok · May 24, 2015

grm61
thank's for posting the Stihl link.
as the old saying goes..You learn something new everyday. I have never even heard of the 4 mix.
Regard's
Sean

docrocky · May 25, 2015

Gentlemen: Again thank you for your responses. After learning that the engine was possibly as Kawasaki/Japanese built, I then drained the fuel tank and replaced the regular with a 50:1 gas oil mix. She runs more beautifully than before while running on plain regular without the oil mix. Previously it seemed to want to tie up after extended running and stiff when using the pull cord. No smoking either. I'll stay with the gas oil mix.

Thanks Again

MossRoad · May 26, 2015

grm61 said:
Here ya go....I like mine. 4-MIX engine ? lightweight and with good lugging power | STIHL

rswyan said:
Moss,

I have a Stihl pole pruner ... uses the same type of engine (4 mix) ... apparently it's something they came up with to reduce engine emissions and pollution.

Thanks. That'll keep me busy reading later. :thumbsup:

crazyal · May 28, 2015

I doubt it'll hurt a thing running with a little oil in the gas. Back when I was a kid my father had a lawboy push mower. So we always had mixed gas. That gas would get used in everything from dirt bikes to go carts with Briggs engines. Never fouled a plug. Of course back then nobody cared about a little extra smoke in the exhaust. In today's world burning a touch of oil in your gas would set off alarm bells.