5.5 Johnson Seahorse I.D.

[fishin4dinneragain]

I was givin a boat with this motor model # cd-18s<br />serial # 2207200, and was interested in finding out what year it was manufactured, mix ratio, and lower gear unit oil specs are. Also i tried to start it today and it fired but for about 3 seconds sounded very smooth. When i tried to start it again it seemed very hard to turn over, is there a location to put oil in the crankcase or is it lubercated by mix only? From what i have gathered it is a 1961, mix : 25-1, Gap .020 i would just like to know if this is correct. And i was also woundering if the "S" in the model # ment anything.

 

[bubbakat]

Re: 5.5 Johnson Seahorse I.D.

1961 CD-CDL-18 <br />fuel mix 24:1<br />points gap at 20<br />plug champion J6C gap at 30<br /><br /><br />they do not have oil in the crank case it is oiled by the mix

 

[fishin4dinneragain]

Re: 5.5 Johnson Seahorse I.D.

I think I found the problem with the hard turn over. While looking at the motor I decided to remove the pullcord housing, to see if that was where the binding was occuring at. Instead I found an inspection plate, which I assumed was for the point adjustment. So being currious I opened it to look at the points and coils. All looked good, and then while gapping the points i noticed a screw that looked out of place. And it was! It was one of the coil screws the washer was pretty bent up. I put it back where it belonged, But did not try to start it. It definatly turns over much easier. I pulled the plugs and gapped them @ .30. When I pulled the plugs I looked at the top of the pistons and walls one looks like it has a crack not sure. Need to do comp test.

 

[Paul Moir]

Re: 5.5 Johnson Seahorse I.D.

It's more likely you were looking at a score mark rather than a crack, especially if it was straight. It can be hard to tell what you're looking at when trying to look down a plug hole.<br />Gear oil should be Bombardier/OMC "HiVis", or SAE 90W GL-5 rated outboard gear oil available at Walmart and just about everywhere else. Stay away from the 75W stuff.<br /><br />Let us know what you find!

 

[fishin4dinneragain]

Re: 5.5 Johnson Seahorse I.D.

Ok After i got 2 hrs sleep i started to bang away at it again. Got the motor to run in a test barrel, but when i went to put it in gear it would die. After it did this a couple of times I decided to open up the lower unit. And damned if I did not find the problem. The drive shaft coupler below the impeller is broken it looks like a large spring inside that snaped apart, Also the lower part of the impeller housing is cracked and mushroomed up towards the motor. If anyone has these parts or replacement part #s that would be a great help. Also is there anywhere online to view an exploded diagram of parts and #s. the impeller looks pretty new and is in good shape.

 

[Paul Moir]

Re: 5.5 Johnson Seahorse I.D.

That's too bad. I've heard a few cases of those shock absorbers going around here, but never one where it damaged the lower unit casing.<br /><br />See what Twin City Outboards wants for the parts. Also try to locate a nearby outboard junkyard.<br /><br />Good luck to you!

 

[fishin4dinneragain]

Re: 5.5 Johnson Seahorse I.D.

Well i guess im sol. I a outboard shop and they said that pinion shaft shock absorber is no longer available. So i guess I am going to weld the shaft togather. As far as the impeller housing goes im gonna shop around to see what thats gonna cost. I really need someone to send me a exploded view with part numbers or a web address where i can view them. Thanks for the quick response.