fuel mix ratio.

[Bubbles Up]

Hi All,

I just picked up a deal on a 9.9 Evinrude,The model number is 10424S I understand that it is a 10 Horse 1974 and the S meaning short.

My best guess that it runs a 50;1 mix.

This my first Evinrude product.

 

[kenmyfam]

Re: fuel mix ratio.

50 to 1 ratio using TCW-3 rated 2 stroke oil and you will not go wrong.

 

[bktheking]

Re: fuel mix ratio.

Gidday eh! Enjoy it, they are a good motor, that year was points and condensers and no telltale.

 

[Bubbles Up]

Re: fuel mix ratio.

Thanks EH!

I am running a TCW3 oil,I drained the mix from my Merc tank.Go figure Merc oil and 91 octane going in to a Evinrude.I might get my knuckles rapped for Merc oil in a Evinrude. It is fresh 50;1 mix.

The points I will have to buy a set and dig deep in my melon and remember how to do them.I think they are set at.020, I like to have a spare set of plugs,.I think the plugs are, standard Electrode L77JC4 Surface Gap L78V,are these still available.I should look for a manual this motor

 

[DJ]

Re: fuel mix ratio.

Save youself a few bucks. You do not need 91 octane. 87 is just fine.

91 can create unwanted deposits.

 

[kenmyfam]

Re: fuel mix ratio.

Thanks EH!

I am running a TCW3 oil,I drained the mix from my Merc tank.Go figure Merc oil and 91 octane going in to a Evinrude.I might get my knuckles rapped for Merc oil in a Evinrude. It is fresh 50;1 mix.

The points I will have to buy a set and dig deep in my melon and remember how to do them.I think they are set at.020, I like to have a spare set of plugs,.I think the plugs are, standard Electrode L77JC4 Surface Gap L78V,are these still available.I should look for a manual this motor

No issue with the merc oil but an issue with the 91 octane. Your motor will run like a champ on 87 octane and save money in the process.
A manual is a must in my opinion.
Champion plugs only in my opinion.