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View Full Version : Alternator Bracket Bolts Sheard!


kalanic
08-28-2006, 12:01 PM
Crazy thing happened to me last weekend while spending a week up at Lake Shasta. My 2004 X-10 w/MCX has 47 hours on it today, I fired her up last tuesday, 2nd day on the water & heard the belt screaming! I shut her down & looked at the belt & felt it had a ton of play. Looking down at the alternator it was very out of line with the main pulley. I opened up my side panel to the motor & saw two bolts missing to the main alternator bracket. I removed the alternator to find that the bolts were not missing, but had sheared off right at the engine block. I had to tap on the stubs left in the engine block with a tiny rat tail file with a point & a small hammer we had on the houseboat. Finally got the bolts out after 3 hours of tapping! Jumped in my buddies X-45, got to a marina that had some replacement bolts, put her all back together & she runs great!

What would cause both these bolt to shear off? Could it happen again??

erkoehler
08-28-2006, 12:03 PM
It is a common problem.....shouldn't happen again with new bolts.

kalanic
08-28-2006, 12:06 PM
Why would it happen with only 46 hours on the motor??

phecksel
08-28-2006, 12:06 PM
Not again... :(

Few years ago, it was a bad batch of bolts.

erkoehler
08-28-2006, 12:06 PM
Something to do with a bad run of bolts that had flaws or something.....they just weren't strong enough.

kalanic
08-28-2006, 12:10 PM
Boy I'll Say! I think I will have the service department replace what I put in when I go in for my 50 hour service & check everything. The alternator made a couple small shallow cuts in my hose comin from my water pump.

bigmac
08-28-2006, 12:11 PM
Why would it happen with only 46 hours on the motor??

It happened to my 2004 with about 18 hours on it. Note that there is an upgraded bracket, that, in addition to the presumedly faulty bolts, should be installed. Not known whether it's bad bolts or bad bracket or both.

Look at this post (http://tmcowners.com/teamtalk/showpost.php?p=121578&postcount=31)...

Here are the different brackets for the MCX

kalanic
08-28-2006, 12:15 PM
It looks like I have the bracket to the right. Is getting it changed out a warranty issue?

erkoehler
08-28-2006, 12:17 PM
It was a service bulletin.

kalanic
08-28-2006, 12:19 PM
Sweet so I should just be able to tell the service dept that I need it done!

erkoehler
08-28-2006, 12:22 PM
They'll know what to do, but no comment on the $

rspiecha
08-28-2006, 12:29 PM
What years are affected by this defect???

Thanks

Rob

kalanic
08-28-2006, 12:34 PM
Is this a service bulletin form Indmar?? How can I find it?

rspiecha
08-28-2006, 12:36 PM
The bracket to the right is the new and improved version from the link on the post with the pictures.

Rob

kalanic
08-28-2006, 12:37 PM
Im pretty sure I have the one to the right But I know I dont have the new bolts required & not sure of what torque pressure Im at since I did the repair out on the lake.

Engine Nut
08-28-2006, 03:02 PM
The upgraded bracket is the one on the right. It takes shorter bolts than the bracket on the left. The bolts for that bracket are 3/8-16stainless steel and one is 1" long and the other is 1 1/4". They should be torqued to 45 lb ft.

Engine Nut

Leroy
08-28-2006, 03:23 PM
Happened to my 01 230VRS at around 55 hours. I did like you, extracted the broken bolts and put new in until shop could change out in the winter along with the new bracket. No more problems in the remaining 100 hours. THey did mine free but I also had a recall notice.

kalanic
08-28-2006, 05:56 PM
My service dept. said they need to contact Indmar with my engine serial number to find the service bulletin. We will see I guess, I gotta go home & get the number.

PendO
08-28-2006, 06:04 PM
Erk, I think this is the older service bulletin .... we got for our 2002 X-9

kalanic
08-28-2006, 06:07 PM
Pendo, You wouldn't happen to have the one for MCX motors would you?

PendO
08-28-2006, 06:12 PM
Pendo, You wouldn't happen to have the one for MCX motors would you?

no, and I am not exactly sure when we got this one since there is no date on it ... I'll go over to Mike's website at www.mymastercraft.com (http://www.mymastercraft.com) and search the forum as he usually has a lot of the updates posted over there ... my guess is that is is a simmilar update as I think the LTR was the generation before the MCX ...

edit - on his site I only see the LTR bracket http://mymastercraft.com/Forum/view_thread.cfm?postid=46&forum=10&category=2 update, sorry man.

bigmac
08-28-2006, 06:14 PM
Pendo, You wouldn't happen to have the one for MCX motors would you?

Indmar's web site (http://www.indmar.com) has a dealer login that contains service bulletins, advisories etc. Your dealer should be able to get that info easily, I would think.

kalanic
08-28-2006, 06:30 PM
Thanks Pendo!

kalanic
08-28-2006, 06:31 PM
Why cant we be informed of all related service bulletins related to our models instead of finding out the hard way???

Stephen Nordquist
08-28-2006, 07:27 PM
The dealer should replace the alternator bracket with a replacement for that defective bracket. Inmar is aware of this problem and have a new design for replacement. I had the same problem and my dealer replaced it with new bracket.