1974 Evinrude 60hp not putting out power

[alexdb607]

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......

 

[david_r]

Re: 1974 Evinrude 60hp not putting out power

lower unit may be binding.............does it have oil in it?

 

[david_r]

Re: 1974 Evinrude 60hp not putting out power

what exactly did the shop do?.........did they simply clean the carbs?

 

[alexdb607]

Re: 1974 Evinrude 60hp not putting out power

Im not exactly sure what the shop did. it pertained to the engine only making a click sound whenever the key was turned. im pretty sure they basically de-winterized it.

 

[david_r]

Re: 1974 Evinrude 60hp not putting out power

ok since we dont know what or if the shop did any thing lets start here.

make sure battery fully charged.

make sure you have a good blue spark that will jump a 7/16 gap. if spark is good then.......make sure your plugs are new or at least real clean.

make you some premix in a spray bottle. spray some fuel (no starter fluid nor straight gas) into the carb opening---now try to start ......

if it starts but wont stay running unless you keep spraying fuel into carb----you either have a fouled carb (very common in 2 strokes that sit) or you have water in your fuel.....maybe even an air leak in a fuel line.

now if it stays running until the carb runs out of gas....then restart it and gently squeeze the primer bulb.....if it stays running while squeezing the primer bulb then you have fuel pump issues.

if neither of the fuel delivery tests work you need to be looking for a clog----------could be check valve in the primer bulb or stopped up pick up tube in tank.

if the fuel nor the spark is the culprit........make sure the timer base under the flywheel (connected to throttle linkage) is moving freely from one stop point to the other.

 

[Deanrt]

Re: 1974 Evinrude 60hp not putting out power

Carb(s)

 

[alexdb607]

Re: 1974 Evinrude 60hp not putting out power

ok. i talked to my dad and 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?