Starter Motor Hit and Miss
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=34707
Printed Date: October-08-2024 at 12:45am
Topic: Starter Motor Hit and Miss
Posted By: kthackwray
Subject: Starter Motor Hit and Miss
Date Posted: September-30-2014 at 10:50am
Hi There
I have been rebuilding an 81 SN with 351 reverse rotation
The motor was completely rebuild and when we go t to starting it , the starter would not work.
So - after much pain and suffering (and cost appx $200 - apparently rewiring a reverse rotation starter had to be done manually or something - probably just an excuse to overcharge me ) the reverse rotation starter was rewound.
And I could not source a replacement part in South Africa a rebuild was an obvious choice.
So far so good - for good measure I stuck in a new Ford Solenoid too (as it would not engage every time on the bench - suspected the bench battery was a bit low or the solenoid was temperamental)
Now it is all wired up and installed in the SN and the starter only engages the
flywheel about 1 in 4 times - when it does not engage the starter motor still spins.
Been trawling the posts and seem to find similar problem but not quite the same.
From the PCM manual they list a possible worn starter motor gear may be the cause ?(the machining in the front causes the gear to engage correctly with the ring gear apparently )
From this forum it seems it may be the ring gear on the flywheel - but then I would expect it NEVER to engage when the motor is in a specific position ? - or is this a misconception ?
Could it be a worn bendix ( I don't think the guys who rewound the starter did anything to the mechanicals of the starter ?
I REALLY don't want to remove the engine again :)
Any suggestions on a process of elimination - would pictures of the starter gear or possibly the ring gear help ?(not sure if I can get in there with a camera )
Any help would be greatly appreciated
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Replies:
Posted By: TRBenj
Date Posted: September-30-2014 at 11:18am
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If it's a ring gear issue, then the problem would be consistent with engine position. If the starter engages 25% of the time for a given engine position, then the problem is likely starter related. Next time it fails to engage, pull the starter and look at the flywheel teeth where the starter engages... If they look good, bring the starter back in for attention. If the teeth look questionable, pull the transmission and replace the ring gear.
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Posted By: kthackwray
Date Posted: September-30-2014 at 11:22am
This was my logic too - thanks
Assuming it is the starter then I am just not sure what to do with the starter when it is off ?
Can I replace just the gear ? what should I look for ?
Maybe adjustment or replace the bendix (just guessing here ) ?
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Posted By: TRIP
Date Posted: January-02-2015 at 3:27pm
Hope y'all don't mind me crashing into this thread...
Same issue here, I believe. Sometimes it takes me 20 times to start, today only 3. Starter motor spins, and so eventually starts. Having the starter being checked as we speak(/write). Pulling transmission and replacing flywheel or "ring gear" (n00b writing here); how costly/much work/difficult is that? All automotive stuff or anything marine-specific in there?
All info welcome! Thanks!
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http://www.flyzone-cr.com" rel="nofollow - FlyZone Costa Rica Wakeboarding
http://www.correctcraftfan.com/diaries/details.asp?ID=8406&sort=&pagenum=1" rel="nofollow - 1997 Super Sport
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Posted By: phatsat67
Date Posted: January-05-2015 at 11:08am
If it is the original starter it's likely the armature is worn. They no longer make that replacement parts so it may be a possible cause of the issue.
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Posted By: mamigacz
Date Posted: January-05-2015 at 2:13pm
There are two different starters housings that will bolt up to the 351W. One is designed to work with a 164 tooth flywheel and the other is for a 157 tooth flywheel. Most (maybe all) inboard ski boats with a 351W have a 157 tooth flywheel.
When I bought one of my boats (with standard rotation), it had a starter engagement issue. After some investigation, I found that the previous owner threw on a starter designed for a 164 tooth flywheel. It was never fully engaging the teeth on the flywheel.
It worth checking.
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Posted By: TRIP
Date Posted: January-05-2015 at 2:17pm
Thanks fellows!
I saw that the teeth on the flywheel are a little bit worn, but didn't know if it was bad enough to cause the issue. Apparently not, cause it works perfectly again (for now..;) ).
Related: can I get just the bendix somewhere, instead of a whole new starter?
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http://www.flyzone-cr.com" rel="nofollow - FlyZone Costa Rica Wakeboarding
http://www.correctcraftfan.com/diaries/details.asp?ID=8406&sort=&pagenum=1" rel="nofollow - 1997 Super Sport
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Posted By: kthackwray
Date Posted: January-26-2015 at 4:33pm
After another $100 mechanical rebuild I now have a working starter
A new trick I learned during installation was to loosen the starter bolts a little and turn it
over a few times before tightening it up properly as it still missed a few times but far less than before after just bolting it in the first time
So hopefully this weekend will see a much better test run of the SN
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