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Author Topic:   Engine Electrical Starting Problem Diagnosis
sbuchholz posted 03-16-2010 07:51 AM ET (US)   Profile for sbuchholz   Send Email to sbuchholz  
[Y]esterday [I] attempted to start my [Evinrude 175-HP INTRUDER outboard motor]. It tried to turn over[,] but it didn[']t[.] [I] checked the batteries and charged them in the afternoon[.] [I] attempted again after the batteries where fully charged[,] and the engine only clicked. Is [the cause of the problem with staring] the starter or power pack? If [the cause of the problem is the starter or the power pack,] how do [I] check these parts to see if [they are] not working?
Buckda posted 03-16-2010 10:03 AM ET (US)     Profile for Buckda  Send Email to Buckda     
Well, before you do anything with the starter, take the battery down to an auto parts store and ask them to "load test" it. It is possible for a battery to show full charge but when under load it doesn't have the power needed.

Also, while you're doing that - pull the spark plugs and turn the motor over by hand - to make sure that the cylinders didn't freeze up over the winter. If it wasn't properly winterized or if you have a bigger problem, it is possible that the cylinders are locked with a bit of corrosion.

Good luck.


newt posted 03-16-2010 12:03 PM ET (US)     Profile for newt  Send Email to newt     
Your problem so far has nothing to do with the power pack. The clicking sound usually means you don't have enough power to the starter. As Buckda said above, make sure your batteries are good, but also check for corrosion on all the wire connections. If you can get your vehicle close to the boat, try jump starting - this will rule out the battery.
sbuchholz posted 03-16-2010 03:25 PM ET (US)     Profile for sbuchholz  Send Email to sbuchholz     
[I] checked my batteries under load[.] [T]hey [measured] 12.69 [volts.] [I] checked the starter without load: [the voltage there] was 12.69 [volts][.] [W]hen [I] checked [unclear] with the key turning [the measured voltage] went to 2-volts.
jimh posted 03-16-2010 07:52 PM ET (US)     Profile for jimh  Send Email to jimh     
In any circuit in which the power is supplied by a battery, the first circuit element to evaluate as a source of the problem is the battery. Check the battery terminal voltage when the battery is under the load of the engine starter motor.

If you measure a voltage drop to 2-volts from 12-volts in an engine starting motor circuit, there is too much series resistance in the circuit.

jimh posted 03-16-2010 07:54 PM ET (US)     Profile for jimh  Send Email to jimh     
To learn how to diagnose problems in an engine starter motor circuit, please read and study the article in the REFERENCE section on this topic:

Electric Starting Circuits

contender posted 03-20-2010 06:21 PM ET (US)     Profile for contender  Send Email to contender     
couple of more things, check your battery cables, are both ends clean and connected with no cuts in the line? then also check if the ends are tight on the engine and the battery...good luck

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