Posted By: Chuck72
300 Yamaha lower Unit - 06/09/18 04:58 PM
So I bought a boat that had 324 hours on 2005 300 hpdi. The lower unit had damage to the skeg and only to the skeg.. I changed the gear oil right after I purchased and it was a little dark but had very little metal and the lower unit seemed mechanically fine.
I was not comfortable with the broken skeg and you fine folks on here advised me to change the case out. At this point I had 326 hours on the motor. I had an individual on here replace the case and now at 337 hours I have no reverse, metal shavings everywhere, but forward seems to work.. there is no noise or grinding but there was evidence of a little water in the oil. I have blackish green oil with a metallic glow.
Is this common after a case change? I get it that new gears often throw a lot of wear on the gears as they seat into each other, but these are not new gears..I have never taken a lower unit apart, but want to see what the issue is. After 11 hours of running mostly at low RPMs graphing I am concerned about the workmanship I got..
I have the lower unit off the boat, so I am certain it is in the Lower Unit that is issue. When I try to shift manually it is all stop, there is no give on the shift shaft it doesn't feel like anything is moving internally.
I can't really afford a new lower unit, but if I have to I will.
Looking for advice.
I was not comfortable with the broken skeg and you fine folks on here advised me to change the case out. At this point I had 326 hours on the motor. I had an individual on here replace the case and now at 337 hours I have no reverse, metal shavings everywhere, but forward seems to work.. there is no noise or grinding but there was evidence of a little water in the oil. I have blackish green oil with a metallic glow.
Is this common after a case change? I get it that new gears often throw a lot of wear on the gears as they seat into each other, but these are not new gears..I have never taken a lower unit apart, but want to see what the issue is. After 11 hours of running mostly at low RPMs graphing I am concerned about the workmanship I got..
I have the lower unit off the boat, so I am certain it is in the Lower Unit that is issue. When I try to shift manually it is all stop, there is no give on the shift shaft it doesn't feel like anything is moving internally.
I can't really afford a new lower unit, but if I have to I will.
Looking for advice.