1955 Johnson 5.5

[Ronald1]

I just purchased a 1955 CD-12 Johnson 5.5. The tank says to mix one half a pint of SEA 30 oil per gallon of gas. The dealer said to use a 25-1 mix using outboard oil. What do you think?

 

[OBJ]

Re: 1955 Johnson 5.5

Hi Cap...Welcome to iboats.<br /><br />Take the advice of the dealer. Start using the 30 weight and you'll get more carbon than ya' can shake a stick at. Use the TCW-3 at 25:1.

 

[Chinewalker]

Re: 1955 Johnson 5.5

Yep, 24:1 ratio (1 quart TC-W3 rated oil per 6 gallons of regular gas) is the way to go. It's a tad leaner than the original 16:1 due to the better oil quality, but not so lean that the motor will want to toss connecting rods out the side of the crankcase...<br />- Scott

 

[Ronald1]

Re: 1955 Johnson 5.5

Thanks for the advice. I was concerned with what the proper ratio is with TCW-3 and you've confirmed my dealers advice. I never intendeded to use the 16:1 30w mix. Can you imagine the smoke that would put out? Thanks