cranking question

[knobby]

I have a new marine statring battery for a 15 electric start Evinrude that seems to lose cranking power after about 10 secs of cranking. I've checked all connections and they seem tight, yet the motor slows to a slow crank after only a short time. Any ideas what to check, I took the battery back and had it load tested and it checked ok. Charges up fine and holds good charge. I'm puzzled....

 

[18rabbit]

Re: cranking question

I suspect diminished battery capacity. The battery can dump the amps needed, but only for as long as the battery's available capacity. Take the battery out of your car and try it.

 

[rickdb1boat]

Re: cranking question

I'm leaning toward the starter going out. That's if the engine is turning freely otherwise. 10 Seconds is way to short for a good or even partially good battery to crank that small motor. If you have access to an ampmeter, hook it up inline with the starter and see what it draws. Bet it's too much...

 

[ncwest39]

Re: cranking question

I would say its the starter also,you have the classic symptoms of a bad one.

 

[JB]

Re: cranking question

Hi, Knobby.<br /><br />My guess is wiring.<br /><br />Go to the FAQ section and follow the troubleshooting for slow/no starter operation.<br /><br />Moving this to General Outboard.