1976 johnson tilt trim motor

[boater guy]

I have a 1976, 85hp, johnson model number is 85ETLR76G, the tilt trim motor doesnt work, replaced solenoid, all wires have power to them, i think i need a new motor?? does anyone know the model number of the tilt trim motor, i thiknk its a prestolite but not sure of the number, anything will help

Thank You

 

[crb478]

Re: 1976 johnson tilt trim motor

You can have the old one rebuilt by a starter or electrical shop, but go to a good shop that guarantees there work. The BRP site list it as part number 0172847. I believe that the ARC 6208 will fit it, but it is not listed for your part number. That motor is available here on i-boats. You should verify that before oredering. The origional has long been discontinued.

 

[Pugetsound]

Re: 1976 johnson tilt trim motor

I have a 1976 Johnson Motor runs excellent and the trin/tilt works fine EXCEPT. When motor is raised it will lose pressure and lower its self. I can raise it right away but it a real pain. It will lower at anchor and while trimed out and running. I have replaced the vent seal and filler seal and everything seems ok. Is there a kit to repair the unit with, and can I ,raise the motor, block it ,and strap it so it will not go sidewase .Then remove one side of the bracket . I did this with a 115 and it worked ok. I really really do not want to remove the motor if at all possible. This is a 200 hp so removal gets real involved.

 

[emdsapmgr]

Re: 1976 johnson tilt trim motor

What a great engine. They don't make them like that anymore. You can have a combination of things going on which will leak, causing the tilt/trim to leak down. Usually these units are pretty bulletproof, but with age you can have problems. There are a number of control valves which can leak, due to dirt/debris or just age. Also, the seals on the pistons can leak with age. You may be able to wrestle the unit out if you take one of the transom brackets loose and support the powerhead. An engine lifter might help hold it. You have a couple of options: get the factory service manual, a factory parts list and troubleshoot it yourself and then rebuild your unit-if it comes to that. Might be just as easy to buy a used 3-wire unit (the 1984 and later units are 2 wire) and just replace the whole thing.

 

[Pugetsound]

Re: 1976 johnson tilt trim motor

Wow Thank you for the quick response. I will give it a try. I built a cradle for the 115 that I replaced a complete unit on a couple of years ago. May try to replace all seals first refill, bleed and see if it holds. If not out it comes. To D-- costly to have it done in a shop. It looks so easy as a caveman could do it. I just sent my wife to the East coast this AM she got out of Seattle on the last flight to J F K and arrived just before they closed JFK, From the snowfall. Went back to NY for seminars and the Westminster Dog Show. Might get lucky and have her snowed in till spring. LOL Again thank you for the advise. Ed

 

[emdsapmgr]

Re: 1976 johnson tilt trim motor

The later trim units had seal kits which were handy for overhaul. I did not see one listed for your older unit, so you may have to purchase the orings/seals individually. Check the Bombardier website for your correct parts list for your trim unit: epc.brp.com

 

[Pugetsound]

Re: 1976 johnson tilt trim motor

endsapmgr You mentioned that after 1984 the unit was 2 wire and mine would be a three wire. Set unit up to repair it and my T/T has only 2 wires comeing from the motor. I know the Motor is a 1976 I wonder if someone had changed the power T/T?? any ideas? I sure hate to tear this down as slow pressure loss is the only problem. Normal operation is excellent. I suppose a guy has to do what a guy has to do. lol ED

 

[emdsapmgr]

Re: 1976 johnson tilt trim motor

It is possible someone changed the system. Both 2 and 3 wire systems work well. The original three wire system required a cumbersome relay box, which was mounted under the rear splashwell of the boat. It had it's own set of heavy cables to the battery with a single solenoid inside-controlling the up movement. The two-wire type has a smaller control box, which mounts to the outer exhaust cover, between the heads-under the engine cowling. Your engine normally would not have the mounting bosses for this box, so I wonder how someone mounted it. This system gets it's power direct from the starter cable wiring and has two solid state relays inside, one for the up and one for the down. The two wire system is a little more compact. I'd probably decide how much it will cost to tear your current unit down for repairs, then compare that with the purchase of a good used unit. That trim system was made by the thousands and should be easy to find in a marine salvage yard or on the web.

 

[ezeke]

Re: 1976 johnson tilt trim motor

The 1976 V4 motor used a PT&T that will not fit on any V4 built after 1977 and the PT&T units built for V4 motors after 1977 will not fit the 1976 V4.

The 1976 PT&T was sold with either a Calco or Prestolite pump.

The Calco pumps can be rebuilt, but are not sold as new units. The Prestolite units are sold as new units by several manufacturers and are also rebuilt and sold as such.

It is important to determine which pump you have because the valve bodies are not interchangeable. You can identify the pumps by the shape of the reservoirs.

 

[Pugetsound]

Re: 1976 johnson tilt trim motor

Think the tilt trim is ok for now . I drained it and refilled with new fluid. It is holding right now, However I rewired the total dash area nice and neat and it all works except the engine wont turn over . I did accidently put two wires on the wrong post but removed them right away. While checking damage is when I decided to rewire the boat. I did check the fuse to the starter and it either was broken ( mabey burn out ) or broke when I had to pull it apart. Will that fuse being blown prevent the motor from starting????? It is the stubby 20 amp comeing out of the main wire harness. Everything was fine when I winterized it and I can turn the flywheel freely with the plugs out. Thanks ED

 

[emdsapmgr]

Re: 1976 johnson tilt trim motor

You will need to replace that fuse to get the engine to start. 510884 about $ 1 each. (buy a couple as spares) and you should be good to go!

 

[Pugetsound]

Re: 1976 johnson tilt trim motor

I love it when a plan comes together. Thank you. ED