V Belt Problem

G

gooders

Petty Officer 3rd Class
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Apr 27, 2007
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Hello everybody , hope you can help. My 1989 Omc Cobra keeps chewing up v belts. I suspect pulleys may be out of line or even wrong belt fitted (got new one on order). Now this sounds really dumb, but I have been trying to sort it all morning. The old belt was shredded so I had a spare one (not sure if right size so ordered new one), anyway I went to fit the belt I had just to see if it fitted . This is what has got me baffled. There does not seem to be enough room for the belt to fit between the lower pulley and the inside of the engine mount. I cant believe you have to undo the front engine mount to fit the belt? (surely not). So, Should the belt fit without having to undo the mounting. I have the manual on a CD but the layout of were the belt runs is not shown, sounds stupid I know but does anyone have a diagram of the route the belt should take.I'm pretty sure it runs were I think it does but through experience I no longer take anything for granted. My next move is to check the alignment of the pulleys with each other, is it common for them to move? If anyone has any ideas I would be very grateful. Thanks again all the way from the UK.:)
 
G

gooders

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V Belt Problem Update

V Belt Problem Update

Hello guys, further to my previous post. I have just done some research and found a few things out. When I lifted the engine cover I noticed a lot of black dust and splinters.I think this is the remains of the previosu belt which on isnpection appears very thin and has no teeth left on it. Also I remember last season she threw the belt off. what do you suspect the problem may be and how do I go about fixing it.
Thanks.:)
 
C

capecodder116

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Re: V Belt Problem Update

Re: V Belt Problem Update

Check pulley alignments, check for rust, rough spots, etc... in the grooves of the pulleys.
 
G

gooders

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Messages
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Re: V Belt Problem Update

Re: V Belt Problem Update

Ok thanks,I will do that in the morning. Regarding fitting the v belt. Am I right in saying that it can be done without removing the front engine mounts?:confused:
 
G

gooders

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V belt problems

V belt problems

Hi people. Just a quick question, I have not had chance to look yet but, out of the three pulleys I have.The crank, the alternator and the top circulator.Which one is most likely to have moved. Does anyone have any experience of this happening to them.I imagine the pulley 'fit' is quite tight on their individual shafts so I gather it will be a pulley tool job?
Thanks:rolleyes:
 
D

drrm123

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Oct 12, 2007
Messages
135
Re: V belt problems

Re: V belt problems

If any i'd say the alternator depending on how it's mounted sometimes the bracket can crack and break, but check all bolts on the others to make sure they are tight. what omc engine is it, also you can just keep posting a reply to your original post, dont have to do new one everytime,,,easier to follow.
 
Bondo

Bondo

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71,095
Re: V belt problems

Re: V belt problems

Ayuh,...
Why don't you just tell Us what's Wrong, rather than asking these Loaded Questions,..??.....

If the Crankshaft pulley has Moved,....It's probably Rusted out.....

If the water circulating pump's pulley has moved,... The bearings are Shot....

Ditto on the Alternator.....

I imagine the pulley 'fit' is quite tight on their individual shafts so I gather it will be a pulley tool job?
Click to expand...

All 3 will be Very Different......
 
Bondo

Bondo

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Re: V Belt Problem Update

Re: V Belt Problem Update

Hello guys, further to my previous post.
Click to expand...

Ayuh,..... Life would be Soo much simpler if you reposted on your Other thread,....
It keeps all the revelant Info together instead of scattered all over the iboats forums......
I just posted over There.....
 
Bondo

Bondo

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71,095
Re: V Belt Problem

Oh Boy,.....

3 threads about the Exact Same Problem,.......

This 1 actually has alittle bit of Info about the motor,..??.....


Don,.....
Do you think you could combine All these threads by gooders together,..?? Thanks....
 
G

gooders

Petty Officer 3rd Class
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Messages
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Re: V Belt Problem

Sorry about the many threads, wont happen again.
 
G

gooders

Petty Officer 3rd Class
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Re: V Belt Problem Update

Re: V Belt Problem Update

Yep, fully agree, not fully used to site but stand corrected.Sorry for inconvenience caused.
 
G

gooders

Petty Officer 3rd Class
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Messages
97
Re: V belt problems

Re: V belt problems

Noted guys.Thanks. A bit of discipline called for I think. Will check all the pulleys tommorow. Still baffled over the belt though. Can it be fitted without removing the front engine mount?:confused:
 
jerryjerry05

jerryjerry05

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May 7, 2008
Messages
18,075
Re: V belt problems

Re: V belt problems

You give NO info and want answers!!!
What make.what year,what model,make of boat.Does it have a front motor mount(what make/model)etc.
Some of these guys are great but we need all that you know.Jerry
 
jerryjerry05

jerryjerry05

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May 7, 2008
Messages
18,075
Re: V Belt Problem

First thing make sure belt is the right one.Just cause it's on there don't mean it's correct.Then run the engine checking for alignment.Then check for corrosion on the pullies.Got pics????? Jerry
 
Gary H NC

Gary H NC

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Re: V Belt Problem Update

Re: V Belt Problem Update

What motor is in it? That would help....a picture would be worth 1000 words too..
Rust on the pulleys will eat a belt up..
 
chiefalen

chiefalen

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May 18, 2008
Messages
3,598
Re: V Belt Problem Update

Re: V Belt Problem Update

Didn't i read he has a 3.0 cobra?

G-d i think im seeing triple.

There is no spacer i think on the cobra front mount. Same as stringers.

Takes 5 minutes and 2 people. And a 1/2 wrench, and a pipe, 4-5 feet.

Loosen the four bolts on the motor mount.

Have someone leverage the port side of the motor with the pipe, and remove the port bolts and starboard bolts.

Have him leverage the motor up till you can slip the 2 belts around the mount.

Have the person lower the engine till you can slip the bolts back in and tighten them.

Now i bet you wonder why i said 2 belts, i tie a spare belt around the mount so if a belt breaks on the water there is a spare belt ready to install.

All you will need is a 1/2 wrench and a pipe or screw driver to leverage the alternator to tighten the belt.

Oh to the question as to why your breaking belts, is the alternator freezing up and the belt is squeeling and burning?
 
Don S

Don S

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Re: V Belt Problem Update

Re: V Belt Problem Update

All 3 posts are now merged into a single one.
Reads kind of funny, but all the info is in one place now.
 
Gary H NC

Gary H NC

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Re: V Belt Problem

It was getting rather confusing...i guess i missed the 3.0 part...:p
 
G

gooders

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Apr 27, 2007
Messages
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Re: V Belt Problem

Thanks for everything guys. Just for clarity.The engine is a 3.0L 1989 OMC COBRA, the GM 4CYL model 140hp. Thanks to Don for sorting out my thread mess up, much appreciation. I believe you have sorted my problem. :)
 
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