Gas to oil ratio on a Johnson 28hp outboard motor?

50:1 ratio on that one,i run mine at 40:1 sometimes,it gives it more power,but the factory recommendation is 50:1 on it and i don't recommend running a stock engine at any less,mine is built a little,good luck.

Gas to oil ratio on a Johnson 5 1\2 HP outboard motor?

If you are mixing your own fuel (motor is not oil injected or direct injection), any 2 stroke outboard uses a 50:1 gas/oil ratio no matter what year it is. Adding more oil does not in any way give the engine more power. More power comes from exhaust tuning. If you use more oil the plugs can foul easier. If you use less oil you will do internal engine damage.

Be sure to use a quality TCW-3 oil such as Jonson/Evinrude XD50.

For the best answers, search on this site https://shorturl.im/awgXY

If you have to make a mistake on the ratio you made it in the right direction. Too much oil will not hurt the engine a bit. It may foul the plugs and it may smoke like a freight train and it might even leave some extra oil around the rings or somewhere else. Since it was missing the plugs are almost certainly the problem. I would suggest replacing them and use the correct mixture. Anything you did to the rings or any other parts will soon be washed clean by the leaner mixture. Happy boating and don't give this a second thought. If your engine dies it is not because of two hours operation with a rich fuel mixture.

It depends on the year also. Newer engines are good with 50:1. If it's as old as late fifties, early sixties, run 32:1. Older Evinrudes/Johnsons did not have roller bearings in the wrist pins, so they used extra oil.

50:1 or 2%

It should say either on the cover or on the engine somewhere... But it's typically 50:1 or 100:1... but earlier answer said 50:1 so he's probably right.

go to the jhonson website depending on what year it is

stop farting