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  1. J

    Impeller clearance

    I am trying to find out what the clearance should be between wear ring/impeller housing and the impeller should be. It’s a 1991 Yamaha Waverunner 3 650. I have searched the web and can’t find an answer for that particular ski. Anyone happen to know? It won’t plain out and impeller looks good...
  2. J

    Pressure in lower unit

    I have an alpha 1 gen 1 lower unit and I have noticed when I took the top vent hole screw out it to check th fluid level one day it gushed oil out and you could hear air as well. From what I have found out the internet there is a vent hole that goes through the gimbal housing at 12oclock...
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