trivia sea horse

[brehlers69]

I have an old johnson sea horse that im trying to get running. I need to know the spark plug info and the year and the horse. The serial # is cast into the motor it is 651503 and direcly above that are these numbers and letters 27E250. I also have a motor running very good but am unsure what year it is. Its a envinrude and the serial number is 3018-12753. thank you for any help you can give me.

 

[Paul Moir]

Re: trivia sea horse

Welcome to Iboats, old sea horse!<br /><br />The Evinrude:<br />Evinrude model 3018<br />Year 1956<br />HP: 3<br />WOT RPMS: 4000<br />Displacement: 5.28 cu.in.<br />Cylinders: 2<br />Weight: 32 lbs<br />Gear ratio: 17:28<br />Fuel/Oil mix: 24:1 87 octane gas to TC-W3 rated outboard oil.<br />Spark plugs: Champion J6C gapped at .030" (J6J has been replaced by the J6C)<br />Of course it runs well! That's probably the greatest small outboard ever built.<br /><br />As for the Johnson, those numbers don't mean much to me. If it looks newer than around the '50s, then look for a model number on a nameplate on the transom clamp. Failing that, check near the rear of the block for a quarter sized silver disc with numbers stamped into it. Also, how many cylinders is this engine, and what are their configuration (inline, opposed, v-4)? Does it have a fiberglas cowl? Approximate horsepower/physical size? Or is this a real antique?<br /><br />Sorry for all the questions, but I'm sure we can figure it out!

 

[brehlers69]

Re: trivia sea horse

It doesnt look newer than the 56'. its a 2 cylinder about 5-10 horse. inline, green with johnson sea horse in red on the back of the gas tank. it weighs about 40lbs and the carbarator is like nothing ive seen. It mounts on the left side to the block via a large hose clamp lookin clamp. that is why its a trivia and ive looked for any more serial numbers and have nothing.

 

[OBJ]

Re: trivia sea horse

Brandon....what does the fuel line connector look like at the motor? Single hose, two hose?

 

[brehlers69]

Re: trivia sea horse

single hose running from the mounted tank to the bottom of the carboator that is mounted on the left side of the engine. the lines are copper

 

[Paul Moir]

Re: trivia sea horse

Ok, I've just been doing a little research here. Good info, thanks.<br /><br />That serial number is from 1948. I think that might be a 9.8hp KD-15 you're describing. Square tank? Closer to 70lbs but the 5hp (TD series) engine has the carb in the normal place.<br /><br />Here's a 1950 one:<br /> Click here.<br /><br />I'll see if I can find some more.

 

[brehlers69]

Re: trivia sea horse

WOW the model KD 9.8! That looks like the one. What year do you think it is and what do i do for spark plugs. I soddered some new wires on and get shocked but i cant get spark out of the ones that were in there so i dont think they are right. I also cleaned the points with emery and every thing elso looks ok as far as the coils. so i figure i should get spark.

 

[brehlers69]

Re: trivia sea horse

what year do you think it is and what should i do for spark plugs. thanks again you guys are great.

 

[Paul Moir]

Re: trivia sea horse

Huh, couldn't find any more pics.<br /><br />I've got to say, I don't know a thing about those earlier magnetos myself so I've got no advice at all there. It's definitely a 1948 as long as that serial number is correct. Here's the only info I've got:<br />KD-15 9.8hp @ 4000rpm.<br />Displacement 11.96 cubic inches<br />Bore 1.125 x 1.96875" stroke (long stroke for the bore!)<br />71 lbs<br />Spark plug Champion D9J (replacing 5MJ) <br />Price $250<br />Champion says the modern plug you want is an D16 gapped at .030". Seems way too hot to me though. It appears that the Champion D9 is still made & sold - that would be my choice.<br /><br />Hope this helps some!

 

[brehlers69]

Re: trivia sea horse

thank you so much I really appritiate the help and ill update you if i get it running. Thanks again you guys are the best.