50:1 ratio?

[Faerbairn]

1970 60hp Evinrude J08894 60073D
1969 55hp Evinrude

Do I have the ratio of oil to fuel correct for these 2 motors? They seem to smoke more than other 2 cycle motors I have had in the past.

Thank you for your help...

 

[freddyray21]

Re: 50:1 ratio?

both of those would be 50:1. Synthetic oil seems to smoke less and it's biodegradable.

 

[emdsapmgr]

Re: 50:1 ratio?

Check to be sure the thermostats are working properly. If they are stuck open, the engine will run cool and it will smoke more. It will also accumulate carbon around the rings quicker and that can lead to long term problems.

 

[tashasdaddy]

Re: 50:1 ratio?

suggest doing a decarb on both of them, cleans out the carbon.

Decarb, take a can of seafoam put 3/4 of it in the gas tank, with only 1 gallon of premixed gas. put the rest in a spray bottle. start the engine, and let it come up to temperature. then remove plugs, and them some real good shot of seafoam into the cylinders, replace plugs, let sit 15 minutes. restart, and spray the rest of the seafoam into the carbs, so the the motor almost stalls, wait and repeat until the seafoam is gone.then take for a wide open spin. then put in new plugs, ad premixed gas to the tank, and take it for a wide open throttle spin. it is going to smoke like a house on fire, during this process.

afterwards compression.recheck