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  1. #1
    Member bassaddic's Avatar
    Join Date
    Mar 2008
    Location
    milwaukee, wi
    Posts
    2,557

    Another lower unit question

    Well, I have a couple questions for you guys. I have a 2007 Yamaha max 2 stroke 150hp motor. This past weekend while I was running down the lake I heard a very unnatural rattling, clunking type of noise. I slowed down and just idled around the rest of the day. I only hear the noise when in gear. I’m guessing after 12 seasons and who knows how many hours the lower unit is wearing out.
    Question 1: When does it make sense to order a new lower unit versus getting it rebuilt/repaired?
    Question 2: Is there anything I can check or do to fix it myself?
    I did drain the lower unit oil and it smelled burnt, was very black but wasn’t muddy like water got in. There was some shaving on the magnet. A little more than normal but no big chunks.
    If I do need a new lower, who do you recommend going with and estimated price?
    Thanks guys.

  2. Member
    Join Date
    Jul 2014
    Location
    Toledo Bend Tx
    Posts
    486
    #2
    Mine did the same as you described. It was the pinion bearing coming apart.
    I had it repaired with new water pump and new seals installed. Cost was $385.00.
    If you can find a good mechanic, I'd say have him take it apart and diagnose the problem. That will let you know which route you need to go.
    A new OEM lower is going to be in the $2500.00-$3000.00 range.