Re: bleeding my trim
The manual has a proceedure that I followed for my inline 6 (1979) 90 HP but it was ultimately a useless proceedure. From my experience with other hydraulic systems I came up with this proceedure on my own and it worked fine. If anyone wants to ammend or improve my directions I am ALL ears but I think this will apply to just about any hydraulic system in principle.
NOTE this is specifically the "Motor OIL" system not the "1985 and later pink fluid system" This is also NOT the proceedure for the "venting plug" if your system has that and not a regular screw with an "O" ring gasket we do not use this proceedure.
Pull the reservoir plug, fill to the top with oil.
Replace the plug.
Cycle the system to the full in position.
Remove the upper bolt that holds the cylinder to the outboard mount.
Open the bleeder screw (on the top of one of the hydraulic cylinder)
Press the "in" button for a few seconds (15 -20) and wait a few seconds and do it again until no bubbles come from the hole. (this will make an oil mess so have a pan under it)
Replace bleeder screw.
Refill reservoir to bottom of fill hole.
Remove bleeder screw from other cylinder and repeat the bleed proceedure.
Refill reservoir once that screw is back in place.
Cycle the hydraulics a few times in and out, letting the
cylinders rise and fall while still on the lower bolts.
With the cylinders in the full "out" position remove the lower bolt and turn the cylinder on its side so the lower bleed screw is "up" and the highest point in the system.
Open the bleeder screw (on the side of one of the hydraulic cylinders)
Press the "out" button for a few seconds (15 -20) and wait a few seconds and do it again until no bubbles come from the hole. (this will make an oil mess so have a pan under it)
Replace bleeder screw.
Refill reservoir to bottom of fill hole.
Remove bleeder screw from other cylinder and repeat the bleed proceedure.
Refill reservoir once that screw is back in place.
Replace the hydraulics on the mounts and cycle the motor up and down a half dozen times.
Clean up.
After the cleanup is pretty much done it will have sat long enough for any leftover bubbles to rise. Top off the reservoir one more time and you should be good.
double check? ok...
set the motor at 50% "in" and let it sit a while, 30 minutes or so...
If you can move the motor more than 1/8" of trim/tilt shaft after that half hour you either still have air in the system or you have a problem beyond that.
Michael
BTW... anyone interested in my '73 Larson G-3 with a 90 HP o/b, & trailer? Fast sleek smooth operator, soft transom...
