77 evinrude runs at half power

[DanFranks]

I bought this boat and motor reciently and took it out for the first time. It had not been ran in 7 years. The motor started fine, but after about an hour the engine began to chug and run at about half power. Also I dont know what gas mixture to use for this motoe. Thoughts?

 

[DJ]

Re: 77 evinrude runs at half power

Franko11,<br /><br />You can just about bet your carburetors are fouled, especially if you do not know what kind of fuel was in it.<br /><br />The correction is to rebuild/clean the carbs. THEY HAVE to be disassembled.<br /><br />The correct fuel oil mixture is: 0ne pint TCW-3 rated oil with six gallons of 87 octane unleaded gasoline.

 

[rwise]

Re: 77 evinrude runs at half power

Franko11<br />Welcome to the board.<br /><br />Did the engine seam hot? after seting 7 years it needs a impeller also.<br />Richard

 

[DanFranks]

Re: 77 evinrude runs at half power

It is not something simple like fouled plugs because I realy did not know what mixture to use. I don't believe that the motor ran hot. I did not see any steam.

 

[LubeDude]

Re: 77 evinrude runs at half power

Please follow what rwise is telling you! That impeller is a disaster waiting to happen, if (when) it comes apart it may clog water passages that are next to imposable to remove! Its cheap insurance and NEEDS to be done! <br /><br />Your power problem is probably Carbs as stated and you may have glogged the filter!<br /><br />LubeDude

 

[P.V.]

Re: 77 evinrude runs at half power

Maybe your computer screens shows more than mine, but what size engine are we talking about? 1977 ?????

 

[Solittle]

Re: 77 evinrude runs at half power

In addition to the above You should replace the gear oil & get a new set of plugs no matter what size motor.

 

[walleyehed]

Re: 77 evinrude runs at half power

Ditto, SoLittle.........