What year is it? Carb problems?

[RichieRich555]

What year is it? Carb problems?

I got this motor from a friend a few weeks back (18hp Sea Horse). Have managed to unseize the pistons. It runs, but not long and not too well. I am looking for a carb kit but haven't been able to find one for this engine... I live in Ottawa and would like to find one in the area but have come up empty handed so far. Does anyone know of a place that would have them available around here? The number on the carb itself is 376404. Thanks.

 

[RichieRich555]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

I guess i would also need to know the year of the motor. I have been unable to locate the serial number. The one from the "carrying handle" has fallen off. Where else would it be located?

 

[BF]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

I'm not sure about motors of that vintage, but check on the engine block for a quarter-sized plug. The later ones have the serial # and often model number stamped there.<br /><br />Brent

 

[RichieRich555]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

the # on this plug of which you speak is 239018

 

[RichieRich555]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

The reason why i think it's the carb is because there is gas leaking from what looks like the slow speed mixture knob. Could i possibly be running the wrong fuel/oil mixture. It's about 24:1 but i have also been told 32:1 and 16:1.

 

[Solittle]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

You probably ought to do a compression check before you spend a lot of time or money on that motor due to the seized piston. It will give you some idea of the condition of the rings.

 

[trumpetbucks]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

239018 does not come up to any Johnson/Evinrude model or year. Look for another number that could be the model number.

 

[RichieRich555]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

how do i go about checking the compression on a pull start motor? My friend has a gauge I can use, does it matter how hard I pull the cord? What is the compression suppose to be for this kind of engine? As for the serial/model # I have looked everywhere. Is there some place it could be that I am overlooking(other than the handle and the silver plug on the crankcase)?

 

[Scoop]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

The plate and the quarter sized plug would be the only places I know for the serial number. Since you have the number off the carb, Napa Auto parts should be able to get you a rebuild kit or your Johnson Dealer. I am not sure if you have Napa there, but hopefully.

 

[RichieRich555]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

Thnx. Anyone know about the compression?

 

[Paul Moir]

Re: What year is it? Carb problems?

Re: What year is it? Carb problems?

Remove all the spark plugs, insert the gauge, and give it a few pulls until the gauge "tops out". Smaller engines seem to need more pulls on larger guages. Your looking for no more than 10% variation between cylinders, and ~100psi or more. The actual reading isn't that important on 2-strokes, mainly the balance.<br />Decarbonizing (search here for 'decarb') and warming the engine will bring your numbers up.<br /><br />Oh, I've never got anything but blank stares from UAP/NAPA stores (which are different from NAPA stores) when I've asked them about marine parts. Plenty of places on the internet have the same stock though.<br /><br />You might be able to narrow the years of your engine by looks from The Old OMC Site. <br /><br />Good luck!