yamaha 150 2/s lower unit; water getting in

[glennhoward]

i have a 1999 yami 150 that runs great but keeps getting water in the lower unit gear case. i have had it rebuillt four times since new and last week when i checked gear lube it looked like a milkshake. help.

 

[robert graham]

Re: yamaha 150 2/s lower unit; water getting in

When rebuilt, did they replace seals for gear shift, drive shaft, prop shaft, drain/fill plugs? I prop shaft was grooved, warn, warped, it can cause leak around that area. I don't know where else it can be getting in, unless it's got a crack somewhere in lower unit that doesn't show up. May have to run a pressure test on lower unit to find leak.