IDoSeaDoo
Well-Known Member
Went out with a couple other members on Lake Gaston this weekend. We rode pretty hard all day and as I was riding back to the boat ramp, my ski started losing RPM. If I let off the gas, it wouldn't regain RPM and would stall. I restarted, and the same thing happened. I was able to idle it in to the ramp, and then blow the water out, but I was alarmed.
The next day, I did a compression test: found that my PTO plug was black and sooty. Cylinder lost 5psi (145 now). Pulled Oil pump, and it tested fine. I got 2ml/min spinning ~3k rpm holding throttle WOT. The oil line did seem to have a few bubbles in it, but I don't think they were that big. The oil lines are only 20hrs old. I know for a fact that I had A LOT of oil in the tank. I filled it that day to the top. I pulled the head and did notice that the PTO cylinder did rub a little vertical stripe on the cylinder to the point where you can't see the cross-hatch anymore. In all other respects, it's the same as the MAG piston. This engine has only 20 hours on it (top and bottom end), and I put brand new (replaced everything) oem RAVES. The MAG rave was totally fine, while the PTO is already puking a stream of oil down the side of the jug.
Anyone have any hints, or ideas of what could cause this? I've been running premium gas in it and using only full synthetic Quicksilver API-TC oil.
The next day, I did a compression test: found that my PTO plug was black and sooty. Cylinder lost 5psi (145 now). Pulled Oil pump, and it tested fine. I got 2ml/min spinning ~3k rpm holding throttle WOT. The oil line did seem to have a few bubbles in it, but I don't think they were that big. The oil lines are only 20hrs old. I know for a fact that I had A LOT of oil in the tank. I filled it that day to the top. I pulled the head and did notice that the PTO cylinder did rub a little vertical stripe on the cylinder to the point where you can't see the cross-hatch anymore. In all other respects, it's the same as the MAG piston. This engine has only 20 hours on it (top and bottom end), and I put brand new (replaced everything) oem RAVES. The MAG rave was totally fine, while the PTO is already puking a stream of oil down the side of the jug.
Anyone have any hints, or ideas of what could cause this? I've been running premium gas in it and using only full synthetic Quicksilver API-TC oil.
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