Dedicated To The Smallest Of Skiffs banner

1 - 3 of 3 Posts

·
I Love microskiff.com!
Joined
·
79 Posts
Discussion Starter #1
I dropped my 1975 Johnson 25, 2 stroke into the test tank after replacing the plugs and spraying de-carb in the carb.  When I fired it up, it ran like a top.  After the test I noticed an unusual amout of oil in the test tank.  Could I be leaking lower unit oil somehow?  I mixed my oil/fuel a little lean according to directions @ about 30%.  How many seals are there in the lower unit that I would have to replace?
 

·
> PRO STAFF <
Joined
·
7,516 Posts
Welcome to the realization that 2 strokes are extremely inefficient engines.

                                        ;)

At idle speeds a 2 stroke wastes up to 40% of the fuel oil mix.
It's dumped straight out the exhaust. That's what you're seeing.
Engine efficency improves as rpm's are increased.
At top speeds only about 8% of the mix is wasted.
That's the reason that the EPA established new emission requirements.
Most manufacturers have switched to 4 stroke tech in order to meet the regs.
 

·
Registered
Joined
·
6,502 Posts
fire her up and put it in gear for 2min and then ck the lower unit oil if it is milky u got h20==---otherwise I am w/ B.
 
1 - 3 of 3 Posts
Top