Aquaman01 Posted April 6, 2003 Share Posted April 6, 2003 I have a Johnson Sea Horse 2.5 hp that I've never started. I know squat about outboards. 2 questions - 1) What is the gas/oil ratio for this engine?2) How do I check/drain/fill the lower unit oil?Thanks - ------------------Aquaman<')}}}}}><{Peace and Fishes Link to comment Share on other sites More sharing options...
0 Paul Rohweller Posted April 6, 2003 Share Posted April 6, 2003 Is it an oldie? Odds are the mix is 20 to 1..To change the lower unit lube hang the motor on a boat or other suitable place so it hangs vertically. Place bucket under prop pull both upper and lower screws, should take a large flat screwdriver. Let unit drain till empty. To refill, insert tube of quality gearcase lube into bottom screw hole and squeeze in the lube till it runs out the top hole. Install top screw before removing tube from bottom. Remove tube from bottom hole and replace that screw. Wipe up mess and dispose of old lube in an appropiate manner. Pretty simple once youve done it a couple times. Have fun!! Paul------------------Paul RohwellerPine to Prairie Guide Service218-962-3387http://fishingminnesota.com/pinetoprairie Link to comment Share on other sites More sharing options...
0 Aquaman01 Posted April 6, 2003 Author Share Posted April 6, 2003 Thanks! It's cream colored. ------------------Aquaman<')}}}}}><{Peace and Fishes Link to comment Share on other sites More sharing options...
0 musky hunter Posted April 7, 2003 Share Posted April 7, 2003 I have an old Johnson 3-1/2 hp. It belong to my uncle and was purchased new in 1959. That gas was always mixed at 1/2 pint per gallon. That ratio would work out to 16:1. The color scheme of the motor is dark maroon with buff or ivory like trim, if that helps to identify the vintage of you're motor. Older Johnsons were green, newer ones were cream colored with maroon trim, but they were all very similar. If it hasn't been run for a while, you should try to get it functioning in the back yard in a garbage can or other suitable continer filled with water. The first thing to look for, once it starts, is that it is pumping water through the exhaust. If it hasn't been used in many years, the impeller may have dried out or deteriorated. The old two cycles are relatively simple and you can go to a library and get a technical manual which will guide you through starting, trouble shooting, and repairing if needed. Link to comment Share on other sites More sharing options...
0 TUMBLEWEED Posted April 7, 2003 Share Posted April 7, 2003 I used to be the owner of a 1954 10hpJohnson, and had some of the same questionsabout fuel mixtures. The "master" upin Robbinsdale told me that with todaysgrades of two stroke oils, a 50:1 mixis just fine. The reason is because back in the day, the oils were just not good enoughfor that ratio. This shop specializes inolder Johnsons, so if you ever need partsor repair I had nothing but good thingsto say about them...... Link to comment Share on other sites More sharing options...
0 Paul Rohweller Posted April 8, 2003 Share Posted April 8, 2003 I still have my old 3 hp johnny (1956) Your right, in the old days you only had sae 30wt oil to mix. Man that HAD to be a smokey plug fouling mess. Mixing car motor oil into an outboard. eeesh. But thats the way it was... Paul Link to comment Share on other sites More sharing options...
Question
Aquaman01
I have a Johnson Sea Horse 2.5 hp that I've never started. I know squat about outboards. 2 questions -
1) What is the gas/oil ratio for this engine?
2) How do I check/drain/fill the lower unit oil?
Thanks -
------------------
Aquaman
<')}}}}}><{
Peace and Fishes
Link to comment
Share on other sites
5 answers to this question
Recommended Posts