1964 johnson seahorse 5.5 troubles

[gammo24]

i have a seahorse 5.5hp CD-21 but i cant seem to get it to run right at all. ive fitted new coils , new plugs , adjusted the points but it takes ages to get it started and when it starts it idles rough for a bit then cuts out. the fuel pump is working fine and ive got the mixture at 50:1 . ive tried turning the slow idle screw to smooth it out but it just doesent want to run. i think im going to strip the carb to check for any gunk inside but does anyone have any advice as to the problem. thanks.

 

[tashasdaddy]

Re: 1964 johnson seahorse 5.5 troubles

totally clean the carb, and use a rebuild kit.

 

[ezeke]

Re: 1964 johnson seahorse 5.5 troubles

For some more good information on your 5.5 motor, copy the link between the quotation marks to your browser:
5.5 Repairs "http://outboard-boat-motor-repair.com/"
5.5 carburetor repair "http://outboard-boat-motor-repair.com/Johnson/Evinrude%20Johnson%205.5%20HP%201954-1964%20Carburetor%20Tune-UP.htm"

 

[jbjennings]

Re: 1964 johnson seahorse 5.5 troubles

Are you absolutely sure you're getting good spark? Sometimes when installing new coils I like to cut the wire (if there's plenty of slack) off about 1/2 inch from the end and reinstall it into the coil. That way, you're getting new wire to screw your coil into. If you're getting good spark, it's definitely a blockage in your carb.
JBJ

 

[F_R]

Re: 1964 johnson seahorse 5.5 troubles

If I'm not mistaken, that year has a fixed high speed jet in the carburetor. It's probably dirty or gummed. It is in the very bottom of the carb and must be absolutely shiney clean!!

 

[gammo24]

Re: 1964 johnson seahorse 5.5 troubles

thanks for all the good advice i will strip the carb tomorrow and see how that goes.

 

[samo_ott]

Re: 1964 johnson seahorse 5.5 troubles

Ah... the CD-21... the last of it's kind forever...

Oh yeah, clean the carb

BTW, have you done a compression check? What is it?

 

[klicknative]

Re: 1964 johnson seahorse 5.5 troubles

I've got a CD19 (1962) that had been sitting idle. I went thru the carbs ect and it ran great in the test tank for a while and all of a sudden the idle went rich. After some investigateing I pulled the fuel pump off and the vacume port was wet so it was pulling gas into the crankcase thru a bad diaphram. Something to check if all else fails.