What is the oil/gas mixture for a 1994 25hp Johnson outboard motor

SOURCE: 1974 johnson outboard motor 25hp stalls when hiting high end

Not familiar with that specific motor but had similar vintage smaller HP Johnsons. From my experience it sounds like it could be that the high speed carb adjustment is too lean. What I would try is running the backing off the high speed screw 1/4 turn to 3/4 turn, then test. If works better, screw back in in 1/8 turn increments until the problem recurs, then back out 1/4 turn and leave it there.

SOURCE: Boat engine 1995 Johnson Outboard 70 HP

Ihave a 1991 70 hp Johnson outboard thats hard to start the first time but starts good after that. Seems to be flooded. Starting rpm seems to be low.

Dean

• 285 Answers
• Posted on Sep 04, 2009

SOURCE: oil mixture for a 70 hp Johnson boat motor?

If it is a 2-stroke motor than gas:oil ratio should be 50:1

SOURCE: i have a johnson outboard motor that drips oil

Yes the prop shaft seal needs to be replaced.Do this sooner than later as water will get into the lower g/box.Sometimes they wear out or fishing line is a bad culprit.Its not a big job but it really needs to be done.The oil will also need replacing.Hope this helps

SOURCE: Does an 85 johnson outboard motor 15 hp have

breaker/maker. set @ 020" @ the highest point but what is you're real problem. Run only champion spark plugs. We spenta dAY @ omc'S SERVICE CENTRE BEING SHOWN WHY. tHEY KNOW BEST!!