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bowaleed posted 11-05-2006 03:07 AM ET (US)   Profile for bowaleed   Send Email to bowaleed  
dear sir,
ihad evinrude 90hp 1998 model. i had notice anew problem recently with the starter that it keep running inspite the engine fail to start . even when i turn the switch to the off position the starter keeps on running and the only way to stop it is to disconect the battery terminal . so whats the problem with my starter.??
Chuck Tribolet posted 11-05-2006 08:26 AM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
Two possibilities: The key switch is stuck on or the solenoid
is stuck on.

Get a voltmeter. Measure the voltage across the two smaller
terminals of the solenoid (yellow with red stripe wire, black
wire) while the problem is happening. If it shows 12V, it's
the key switch, if it doesn't show 12V, it's the solenoid.


contender posted 11-05-2006 12:02 PM ET (US)     Profile for contender  Send Email to contender     
Chuck is correct It is probably the solenoid, do not see a lot of bad switches (unless you are dumping salt water on the switch) the solenoid is easy and cheap fix... ps it also could be in the starter, seen this once...good luck
jimh posted 11-05-2006 07:02 PM ET (US)     Profile for jimh  Send Email to jimh     
If the starter motor continues to spin after the engine has started, there are two possible reasons:

MECHANICAL: the starter gear mechanism is not retracting, and the starter is being spun by the flywheel. You have to repair the starter mechanism. It probably has a problem with the spring loaded starter gear.

ELECTRICAL: the starter continues to be supplied with current and the electric motor is spinning the starter. You have to repair the electrical system. Either the solenoid has stuck in the closed position, or the solenoid is being supplied with current to its coil.

Chuck Tribolet posted 11-05-2006 11:35 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
Contender, FWIW, a buddy of mine's '04ish Merc had a keyswitch
problem. Burned out the starter quite a ways from the harbor.


jimh posted 11-06-2006 09:17 PM ET (US)     Profile for jimh  Send Email to jimh     
You will want to fix this problem quickly. An engine starter motor is designed for about a 1-percent duty cycle. That is, it is designed to spend 99-percent of its time off and only 1-percent of its time in operation. If you are running the motor in continuous operation it will not survive long.
bowaleed posted 11-07-2006 02:11 AM ET (US)     Profile for bowaleed  Send Email to bowaleed     
thanks chuck,
am going to check the problem with the voltmeter. but the problem happened very occasional 3x the last 6 month so it is on and off. can i still check with the voltmeter even if the problem not happenning at the same time ?


Chuck Tribolet posted 11-07-2006 09:46 AM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
No, you need to have it happening to test it with the voltmeter.

Get the voltmeter, keep it on the boat, check out where you
need to measure stuff so you can do it quickly when it reoccurs.
Intermittent bugs are a pain.

And jimh is right about this ruining your starter if allowed
to persist. Starter motors will overheat if used with long
duty cycles. And probably wear out their bearings too.


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