www.iFourWinns.com

Hey guys so my out drive keeps lowering after sitting for a couple weeks. I noticed it over winter but it seems to have gotten worse. Parked the boat 2 weeks ago on trailer and motor was all the way down yesterday. I'm going to keep a close eye on it to see if it gets worse but it seems sometimes it's fine and other times it will drop. Any ideas. Thanks


98 horizon rs. 5.0gi sx cobra

I find on my SX Drive, that if I fully raise & lower the drive 5 odd times, it seems fine again for a month or two.
I put it down to my boat's character!

_________________
2011 Four Winns H180 SS.
Aussie built Mustang 2800.
SOLD - 1997 Four Winns Horizon RS

One of the seals in your trim system isn't fully sealing. If you can't find any leaks, it's probably escaping back into the trim fluid reservoir.

_________________


Mike
2005 Four Winns 230/240
VP 5.7GXi/DP
1998 F-150 XLT
Boat Pic

If you are not leaking oil, it can be a seal in the trim pump valves, or it could be the O-ring internal to the trim cylinder (either one, does not have to be both).

As deafwish implied, if it's not leaking oil, you can wait for it to get worse before addressing the problem. Lowering over the course of "a couple weeks" is not too bad, but if you are noticing the trim creeping down while you are cruising, then it's pretty bad.

It's not too hard (or expensive) to replace all the O-rings in the trim cylinders DIY, but you need a spanner wrench to unscrew the cylinder head.

_________________

"Knot Easy" 2000 Horizon 240 Volvo 5.7GS /SX
tow: 2017 Honda PILOT EXL-AWD
prev. boats:
'87 Chaparral 198CXL 4.3 OMC Cobra
'69 Jetstar 16ft Ski Boat, 115hp Yamaha
'68 Aluminum Jon Boat, 3hp Sears
'64 Water Wings

Is the trim reservoir a sealed unit?

Yes but would have a pressure release for air.

_________________
2004 - 288 Vista
Twin - 5.0 Volvo Penta GXi DP

^^^ Correct.
I can unscrew the pressure release bung and remove/ replace the hydraulic fluid.

_________________
2011 Four Winns H180 SS.
Aussie built Mustang 2800.
SOLD - 1997 Four Winns Horizon RS