Johnson 112 SPL

L

lonesomeboatman

Recruit
Joined
May 27, 2004
Messages
5
I've just bought a Wellcraft 18DX c/w a Johnson 112SPL O/B. I'm new to boats. Boat was imported to UK from US a few months back. Question is - is engine 2 stroke or 4 stroke? How can I tell? Looks like 2 stroke to me. Guy I bought from didn't know - he knows even less about boat engines than I do. I've looked for an oil reservoir on the boat but can't find anything. Would the fuel have to be pre-mixed? What ratio?
 
R

R.Johnson

Rear Admiral
Joined
Sep 24, 2003
Messages
4,446
Re: Johnson 112 SPL

The engine is a 2 stroke, give us the model number so we can tell the year.
 
rickdb1boat

rickdb1boat

Supreme Mariner
Joined
Jan 23, 2002
Messages
11,195
Re: Johnson 112 SPL

You have a 1996 Model(ED) extra-long shaft(25"). Pre-Mix fuel/oil at 50:1 mix, if there is no oil injection. 1 pint TC-W3 oil per 6 Gallons of gas. Of course, you will have to convert these numbers... Look where the fuel line connects to the motor. If the oil nipple(If it has one), has been capped off, you do not have oil injection. Doubt that you did anyway on a "Special" motor. Those were pretty bare bones motors, but still very good motors, without the frills.
 
L

lonesomeboatman

Recruit
Joined
May 27, 2004
Messages
5
Re: Johnson 112 SPL

The previous owner, who only ran it a few times reckons it is was 4 stroke and thus didn't premix the fuel. So now that I know its a 2 stroke and requires the fuel to be premixed what damage would have been done by not premixing fuel with 2 stroke oil? Engine sounds fine, good compression and performance.<br /><br />Paul
 
P

phatmanmike

Captain
Joined
Oct 24, 2003
Messages
3,869
Re: Johnson 112 SPL

do a compression test and maybe do a de-carb... i cant believe that guy thought it was a 4 stroke and its still living... thats omc for ya
 
You must log in or register to reply here.
Top