70's Evinrude 75hp

[MASTER Brian]

I am planning on helping my step-nephew get a '76 (?) Evinrude 75hp outboard fired up that has been setting for about 3-4 years.

What all should I do to bring this back to life after setting that long? It's my sister's boat, which the starter went out on several years ago. They had the starter re-built, but never bothered with getting the boat running again. I'm not sure if it was properly stored or not.

I plan on dumping the fuel and running a decarb through the engine using seafoam and fresh gas. What else would you do? Should I pull the plugs and spray some deep creap in the cylinders and into the carbs? What about turning the motor over by hand a few times to make sure nothing is sticking?

The motor always seemed to have low power, but since buying my boat and working on it and learning the things I've learned, I am thinking a good decarb would help this out a bunch.

I plan on starting the boat off of a hose, being as the lake is 30 minutes away. Any suggestions would be appreciated!

 

[tashasdaddy]

Re: 70's Evinrude 75hp

99.9% chance the carbs, are totally gummed up, disassemble, including all jets. soak, clean till sparkling, reassemble with a rebuild kit w/ new floats. pull the plugs, tilt it up and put marvel mystery oil in the cylinder, overnite, then, have rag ready, lower the engine, catch the oil, put rag over the plug holes, and turn over by hand. while you have the plugs out, do a spark test, and a compression check, as a basis, to compare to. then if you get it to start, only run briefly, and do the impeller and tstat. here's 2 very informative links: http://forums.iboats.com/showthread.php?t=158086

this one you may want to copy and save for good reference: http://www.iboats.com/bbboard/bbBoard.cgi?a=viewthread;fid=28;gtid=818798;gpid=818802


this one is for if you have spark problems other than coils, : http://www.boatpartstore.com/page28.asp