Vintage Sled Fuel Mixture

[Dr. Bob]

Can I run 50:1 in a 73 Skidoo One Lunger?

[perchpro]

yes

[Surface Tension]

The recommended ratio is 24 to 1 on that engine.

[Guest]

yes you can run 50 to 1 if you want to sieze the piston. I have run singel cyl rotaxs for 30 years and i allways ran a 20 to one fuel mixture

[Dr. Bob]

Thanks Guys -

I have not run sleds for quite a few years and am going to fire up the old Skidoo this weekend (purchased last year for the chitlins ).

I wasn't sure on the ratio so I thought I had better check here first. I'm glad I did! Two outta three are for the thicker mix so that's what I'm going to do.

Thanks again,

Dr. Bob

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Crank the Shank!

[Guest]

I've always dumped in a quart of oil to 5 gallons of gas, which I believe works out to be 20 to 1. I use premium gas, the plugs rarely foul.

[hydro]

Those old sleds were almost all 20:1 mix on the oil. Back in those days oil was not as good and engine tolerances not as consistant.

It would probably run fine on a high quality semi synthetic oil at 50:1 but why take the chance?