Modify Tilt Trim System

[GAV10]

I'm trying to mount a 1977 85 HP Johnson Javelin Outboard Motor on a 1976 Glastron GT-150 boat. The trim/tilt motor is mounted externally on the right side transom bracket. The transom of the GT-150 is not straight across, it has extensions that come aft several inches. When trying to mount the motor the trim pump is hitting the right extension. Can I delete the pump from the transom bracket and mount it in the boat? The old trim motor is bad anyway with a replacement cost of over $300. So I'm looking for a alternate pump/motor/reservior assembly. I found a Mercrusier assembly brand new in box for $200, that's pump/motor/reservior. I have a local hydraulic shop that can fabricate the custom hoses. Electrical is not an issue since the boat is under restoration with no electrical wiring now. So will the Mercrusier pump work? Any other suggestions?

Thanks...Mark

 

[R.Johnson]

Re: Modify Tilt Trim System

You might take a look at a transom jack. This is a bracket that will set the engine back on the transon. I used one on a i5.5 Ckeckmate with good results. It had 5" of setback. It will also allow more engine height if you want. You could turn the GT into a good performer with the right set-up.

 

[GAV10]

Re: Modify Tilt Trim System

Yep..........already have a "jack plate" with 5 inches of setback. Still no good I would have to go out to 10 inches of setback for it to clear.

Thanks.......Mark

 

[R.Johnson]

Re: Modify Tilt Trim System

10" sound's like a lot on that small boat. Hopefully some one else will come in here that has worked with this. Seem's some of the early Merc system's had the pump mounted inside, or maybe the racing system,s. Does'nt sound all that hard with the proper material,s.

 

[RRitt]

Re: Modify Tilt Trim System

check to make sure that it includes everything for $200. That's usually the price of just motor.

assuming that the pump includes everything then go for it. Mercury systems operate at higher pressures while Evinrude systems operate at higher square inches. It may lift a little slower, but everything will work fine, no problems. A tilt limit sensor/switch would be an awesome touch as would Mercury electricals. Forgive me for saying, but Mercury has better wiring harness and switch designs.

If money is tight or if you are heading for salty waters then you might want to find a local brake shop and have them make you some CuNi hardline tubing. CuNi is better than stainless in saltwater because it is strong enough for hydraulic tubing but does not attack your aluminum. CuNi is standard equipment in world of industrial and commercial but has not trickled down into recreational boating. Volvo and Mercedes use CuNi brake tubing because of road salts and so it has started shopwing up a little in American brake shops. The US trade name is EasyBend and the manufacturers name is BrakeQuip. Braided hose will probably cost you $60-$70 per line while CuNi tubing is around $2 per foot.