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-   -   I/O Trim Pump Circuit Problem (http://www.wakeworld.com/forum/showthread.php?t=719996)

ship_of_fools 07-27-2009 12:18 AM

I know most people have inboards here but was hoping someone could help me out. <BR> <BR>I have a '99 Sea Ray 210 BR with a 5.0L MPI Mercruiser and a Bravo 3 lower unit. <BR> <BR>The other day the drive unit started to creep down very slowly. It doesn't stay raised and will settle down to the ground in just a few hours while parked. <BR> <BR>It was working fine before this started and still works fine. It can hold itself up while we boat (if it goes down it is very slow). I use the trim a lot to help adjust the wake while the kids wake board. <BR> <BR>I checked for leaks, both inside and outside the boat. If there are any leaks it is way under or behind the engine were I can't see it. <BR> <BR>The trim fluid was right at the minimum level and I topped it off then ran the drive up and down a few times. I thought there might have been some air in there but that didn't help. <BR> <BR>I called some dealers and was told the pump has check valves and they are know to cause problems. I was also told the cylinders can be leaking internally. <BR> <BR>And, finally I was told that the cylinders have trim guides that deteriorate and put contaminants in the oil. And this is what gets stuck in the check valves. So I really need to replace (or rebuild) the pump as well as the cylinders. <BR> <BR>Does anyone have any past experience with this issue? Any troubleshooting suggestions? <BR> <BR>Thanks

266crownlinebr 07-27-2009 12:53 AM

I would say rebuild the pump, but leave the cylinders alone. I have never had this problem (7.4l I/O w/bravo 3) but I have heard of this problem.

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