Ididntdoit
Well-Known Member
2004 v-drive - I don't have the serial numbers - anyone have a part number? better yet, a cross reference to get them at an autoparts store?
8.1 serpentine belt part number
- Thread starter Ididntdoit
- Start date
Little Ducky
Well-Known Member
- Jun 5, 2017
- 2,654
- Boat Info
- 1998 290 Sundancer
- Engines
- Twin EFI 5.0L w/Alphas
Kohler 4kW
http://shop.toadmarinesupply.com/utility/includes/content/sierra/catalogpages/8025-639.pdf
Find your belt size and go to O'Reilly Auto Parts they can look up belts by size and closely match one for you.
Find your belt size and go to O'Reilly Auto Parts they can look up belts by size and closely match one for you.
scoflaw
Well-Known Member
- Aug 10, 2011
- 6,395
- Boat Info
- 1999 Powerquest legend 260 sx 502 mag
2005 Baja 242 islander 496
- Engines
- 502 mpi Bravo 1
496 mag B1
Auto part stores can measure the old one
KevinC
Well-Known Member
On my 2004 340SDA with 8.1 V-Drives I belts with these specs: 6 Ribs x 2285 mm
The specific belts I used were the Bando USA 6PK2285 available on Amazon.
Fit perfect and worked great (at least until my alternator locked and burned one up but that is another story
). I did not hesitate to reorder.
-Kevin
The specific belts I used were the Bando USA 6PK2285 available on Amazon.
Fit perfect and worked great (at least until my alternator locked and burned one up but that is another story
). I did not hesitate to reorder.-Kevin
iBoat Skipper Doug
Active Member
- Aug 8, 2018
- 140
- Boat Info
- 2003 225 Weekender w/Bravo III drive
2019 Venture trailer
- Engines
- 5.7 MPI Mercruiser w/Bravo III drive
Ditto.
As a person who has been all over inside the Mercury Marine Fond du Lac plant, they do not make belts. Belts are made for Mercury and private labeled as if they were made by Mercury.
Automotive belts are just fine to substitute for OEM marine belts to save money, and provide you a ubiquitous supply.
How much is the savings? Well, for my 5.7 MPI Mercury motor, the dealer wanted $140 for a official Mercury brand belt. I substituted a properly sized Gates brand automotive belt for $38 from a local automotive parts retail store.
I would have also purchased a Continental (Formerly Goodyear), ACDelco or Bando USA brand belt. I avoid Dayco, Dunlop, Mitsuboshi, or any discount belt brand I do not recognize. If you are overwhelmed by belt brands, grasp two belts. Poke your finger tip into the smooth side of the belt. Buy the one that is softer.
How to know which belt to buy?
Many auto-parts stores have a tool that allows you measure your belt length yourself.
Look at your engine with the current belt installed. Is the adjustable fly-wheel near minimum or maximum or fairly centered? Note this.
Next, look at the belt. Count the ribs.
At the auto-parts store, use their free-to-use belt length measuring tool to measure the current belt length. Then, knowing the belt rib count and length, buy the best quality serpentine belt they offer.
If you can not find a exact length match to your measured length, use the previous mentioned fly-wheel location to determine if you are better off going with a belt that is slightly shorter or longer. You should be able to find a belt that matches your current belt within a centimeter, about the width of a pencil.
As long as you are doing this, buy a spare belt and keep it onboard with your other spares and tools. You do have an assortment of spares and tools onboard, don’t you?
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Ididntdoit
Well-Known Member
Thanks guys.....helping out a friend, replaced alternator yesterday and noticed the belts need replacing
KevinC
Well-Known Member
I have two alternators along with two new belts awaiting my time to change. Hopefully this week after some of these temps break.
-Kevin
