Throwing Serpentine Belts

Discussion in 'General Maintenance/Repair Questions' started by capecodcruiser, Jul 16, 2019.

  1. capecodcruiser

    capecodcruiser Member

    488
    Aug 1, 2008
    Falmouth, MA
    2001 310, 350 HO's/Vdrives.
    Mercruiser MPI 350 HO's
    Thanks for taking the time to try and help Scof'. I don't easily give up, but this one is kicking my a@#......
     
  2. 370Dancer

    370Dancer Well-Known Member

    Oct 2, 2006
    Florida - Alabama
    1998 370 Sundancer
    380hp MAG MPI Gen VI with V drives
    You can get replacement alternators with the pulley from DB Electrical cheaper than pulleys alone.
     
  3. capecodcruiser

    capecodcruiser Member

    488
    Aug 1, 2008
    Falmouth, MA
    2001 310, 350 HO's/Vdrives.
    Mercruiser MPI 350 HO's
    Damn, wish I had known about them! Pulley was $50, but I looked and a whole alternator is $110!
     
  4. bobeast

    bobeast Dance the Tide SILVER Sponsor

    Oct 22, 2017
    Isleton, CA
    2002 310DA
    350 MPI w/V-drives
    More just putting it out on the ether as you were both talking about shimming. Really, though that's all the bulletin is about. No mention of trimming, but they are happy to sell you a spacer of what they consider to be the right thickness. I think it was something like $10 per engine for a relatively thick spacer.
     
  5. capecodcruiser

    capecodcruiser Member

    488
    Aug 1, 2008
    Falmouth, MA
    2001 310, 350 HO's/Vdrives.
    Mercruiser MPI 350 HO's
    Bob, in a desperation move, I ordered the spacer tonight. Need to resolve this asap so I can move on to other pressing needs on the boat.
     
  6. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    DB electrical products are all Chinese crap and rust quickly. There's a reason they're cheap.

    As far as the trim and shim goes...If all your pulleys have to align with the crank and you alternator sticks out further than that pully, how's a spacer going to fix your problem ?
     
  7. 370Dancer

    370Dancer Well-Known Member

    Oct 2, 2006
    Florida - Alabama
    1998 370 Sundancer
    380hp MAG MPI Gen VI with V drives
    yup. I shoot em with corrosion block, and replace them every 3-4 years. My factory Motorola alts were both bad after 300 hours (over 20 years). Heat kills all of them.
     

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