1974 60hp evinrude power problems

alexdb607

Cadet
Joined
Feb 9, 2009
Messages
8
i am new to boating but as far as mechanics im pretty handy.
i was recently given a boat from my grandfather and it has a 60hp evinrude motor on it. the motor didn't run at all at first because the motor had been "winterized" and had sat out of the water for probably 20 years. so my dad had it taken to a mechanic and after that it ran. when we got around to taking it out we got the motor to run full throttle and top speed and it was going great. then it just bogged down. now it doesnt go full speed. the throttle will be all the way but no juice. i checked the compression on the cylinders and there all perfect. the spark plugs are new. the fuel mixture is correct. any thoughts or help anyone can give me would be really great. when i put muffs on it in the drive way it seems like its reving as high as it should while in the water. but theres no load on it so......
this is what the shop did:
replaced the impeller
replaced all the plugs
cleaned the carbs
they did everything your suppose to take care of after a motor sits for so long.

my dad wants to think its the power pack on the motor. could that be it?
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: 1974 60hp evinrude power problems

have you check spark. with a spark tester, should be blue, and jump 1/2 inch. did you replace fuel lines, with alcohol resistant lines? those high speed jets are easy to clog, because the sit in the bottom of the carb bowl.

just for info. http://forums.iboats.com/showthread.php?t=244013
 
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