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#21
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Mercrusier starter mounting bolt problem
Does anyone have a link to example pictures or catalog of the "L
shaped starter bracket" referred to earlier by billgran (Bill Grannis)? I have a 1999 Sylvan 21’ bow-rider with a 5.7L Mercruiser which I purchased used last year. I have had numerous problems with the starter failing to engage properly with the flywheel, have replaced starter motor 3 times, replaced the flywheel, had 2 different licensed Mercruiser mechanics charge me over 2K in repair bills and they both threw their hands up and stated they don’t know what is causing it to fail continually. I read these messages which got me thinking about the possibility of the starter shifting / flexing away from the flywheel. I jammed a wooden wedge between the starter housing and a longitudinal rib on the boat frame and I have not had a problem since. I am cautiously optimistic this is the cause of my problems and would like to locate a bracket to fix the starter robustly to the engine block and prevent shifting. If anyone has pictures or a link to a site showing this type of bracket, I would really appreciate it. I would prefer to buy a bracket off the shelf if possible or I could have one made up. Example pictures would be really useful in that case. Thanks, Mark "Billgran" wrote: "Larry W" wrote in message ... Just a heads-up to anyone replacing a starter in an I/O Mercrusier. I replaced one in a 3.0 about a month ago and it was the first starter that came with new mounting bolts. Customer called Sunday with a complaint that the starter was making a funny noise. Turns out the long mounting bolt had failed/sheared off (see link below). There was nothing unusual about the install and I know I didn't over tighten it. Quite a few years back, MercCruiser, Volvo, and OMC had starter bolt breakage problems with the 3.0L motor due to vibration the first year GM changed to the small-diameter permanent-magnet starter housing. Each company sent out service bulletins about, and incorporated into the following years line-up, an L-shaped bracket from the back of the new starter to the engine block. The bracket kept the starter from wobbling when the motor was idling, thus keeping the bolts intact without breaking. See your dealer for the bracket and hardware as I'm guessing that it was probably not installed and tightened like it should have been. One bolt on the back of the correct starter has a threaded stud for the bracket, lockwasher, and nut. There is a threaded hole in the engine block for a bolt to fasten the other end of the bracket. Bill Grannis service manager -- Posted at author's request, using moderated http://www.BoatingForumz.com interface Thread archive: http://www.BoatingForumz.com/Mercrus...pict99801.html |
#22
posted to rec.boats
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Mercrusier starter mounting bolt problem
On Sep 8, 6:22*pm, mark wrote:
Does anyone have a link to example pictures or catalog of the "L shaped starter bracket" referred to earlier by billgran (Bill Grannis)? I have a 1999 Sylvan 21’ bow-rider with a 5.7L Mercruiser which I purchased used last year. I have had numerous problems with the starter failing to engage properly with the flywheel, have replaced starter motor 3 times, replaced the flywheel, had 2 different licensed Mercruiser mechanics charge me over 2K in repair bills and they both threw their hands up and stated they don’t know what is causing it to fail continually. I read these messages which got me thinking about the possibility of the starter shifting / flexing away from the flywheel. I jammed a wooden wedge between the starter housing and a longitudinal rib on the boat frame and I have not had a problem since. I am cautiously optimistic this is the cause of my problems and would like to locate a bracket to fix the starter robustly to the engine block and prevent shifting. If anyone has pictures or a link to a site showing this type of bracket, I would really appreciate it. I would prefer to buy a bracket off the shelf if possible or I could have one made up. Example pictures would be really useful in that case. Thanks, Mark Mark , If your starter is the full sized model (10MT delco) then send me your address and I'll mail you one. I have some just laying around. one is yours for the asking. It's the same bracket as off a 350/400/454 chevy truck from about 1976 up to about 2000. Tschnautz at g mail dot com |
#23
posted to rec.boats
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Mercrusier starter mounting bolt problem
The bracket shape depends on the starter. Do you hare the Delco direct
drive unit-(5" dia motor, big/heavy) or the newer,smaller planetary drive starter. If big Delco, I have a bracket for you. JR mark wrote: Does anyone have a link to example pictures or catalog of the "L shaped starter bracket" referred to earlier by billgran (Bill Grannis)? I have a 1999 Sylvan 21’ bow-rider with a 5.7L Mercruiser which I purchased used last year. I have had numerous problems with the starter failing to engage properly with the flywheel, have replaced starter motor 3 times, replaced the flywheel, had 2 different licensed Mercruiser mechanics charge me over 2K in repair bills and they both threw their hands up and stated they don’t know what is causing it to fail continually. I read these messages which got me thinking about the possibility of the starter shifting / flexing away from the flywheel. I jammed a wooden wedge between the starter housing and a longitudinal rib on the boat frame and I have not had a problem since. I am cautiously optimistic this is the cause of my problems and would like to locate a bracket to fix the starter robustly to the engine block and prevent shifting. If anyone has pictures or a link to a site showing this type of bracket, I would really appreciate it. I would prefer to buy a bracket off the shelf if possible or I could have one made up. Example pictures would be really useful in that case. Thanks, Mark "Billgran" wrote: "Larry W" wrote in message ... Just a heads-up to anyone replacing a starter in an I/O Mercrusier. I replaced one in a 3.0 about a month ago and it was the first starter that came with new mounting bolts. Customer called Sunday with a complaint that the starter was making a funny noise. Turns out the long mounting bolt had failed/sheared off (see link below). There was nothing unusual about the install and I know I didn't over tighten it. Quite a few years back, MercCruiser, Volvo, and OMC had starter bolt breakage problems with the 3.0L motor due to vibration the first year GM changed to the small-diameter permanent-magnet starter housing. Each company sent out service bulletins about, and incorporated into the following years line-up, an L-shaped bracket from the back of the new starter to the engine block. The bracket kept the starter from wobbling when the motor was idling, thus keeping the bolts intact without breaking. See your dealer for the bracket and hardware as I'm guessing that it was probably not installed and tightened like it should have been. One bolt on the back of the correct starter has a threaded stud for the bracket, lockwasher, and nut. There is a threaded hole in the engine block for a bolt to fasten the other end of the bracket. Bill Grannis service manager -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth |
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