Slow crank speed evinrude 70hp.

[Bazzle218]

I have a 1978, 3 cylinder 70hp evinrude.<br />Problem slow cranking speed to start then occasionaly spins quick and starts.<br />What have I done ? New Battery,soleinoid, Starter reconditioned. When I remove a plug and wind over the motor it spins freely and starts on 2 cylinders. I have removed each plug with same result. will start on any 2 with no worries. Am thinking excessive back pressure? <br />Could faulty reed valves cause this? Help not rich and wife will kill me if it costs a fortune <br /><br />Bazzle

 

[JB]

Re: Slow crank speed evinrude 70hp.

Ahoy, Bazzle.<br /><br />Welcome to iboats. <br /><br />I suspect high current cables and their connections are causing your trouble. Check all connections for good electrical connection (take them off and clean thoroughly) and inspect cables for under-the-insulation breakage or corrosion.<br /><br />The most common culprit is the battery ground cable to engine block connection.<br /><br />Good luck, and let us know what you find.

 

[Bazzle218]

Re: Slow crank speed evinrude 70hp.

Thanks for the advice. Will let you know how it goes. Pulled off the exhaust/water jacket and its full of white calcium. any advice on how to remove it other than elbow grease.<br />

 

[JB]

Re: Slow crank speed evinrude 70hp.

Vinegar dissolves calcium deposits well, if that's what they really are, Bazza.<br /><br />Also, household products such as "Lime Away" work well.<br /><br />Ultimate calcium removers are oxalic acid products like "ZAP!" and "Barkeep's Friend".<br /><br />Good luck.

 

[Bazzle218]

Re: Slow crank speed evinrude 70hp.

Thanks for the help. Belive it or not I replaced the wiring and it still would not work. Anyway took the starter that I had serviced ( i Thought) back to the workshop. They did a swap and its going well. Obviously they did not bench test it properly the first time. Anyway Thanks for the help and will updat you after I take it for a good run.<br /><br />

 

[Bazzle218]

Re: Slow crank speed evinrude 70hp.

Originally posted by Bazza from Australia:<br /> Thanks for the help. Belive it or not I replaced the wiring and it still would not work. Anyway took the starter that I had serviced ( i Thought) back to the workshop. They did a swap and its going well. Obviously they did not bench test it properly the first time. Anyway Thanks for the help and will updat you after I take it for a good run.<br /><br />

 

[Bazzle218]

Re: Slow crank speed evinrude 70hp.

Boat running beautifully. Starter Motor was the problem all along. But the other suggestions were done. Can't complain It needed some TLC<br /><br />Bazz