Power tilt kit info 1972 OMC 3 cylinder

[amuller]

I have parts pretty much matching those shown here: http://www.marineengine.com/parts/johnson-evinrude-accessories/index.php?year=1972&model=Electrical+1972&section=Power+Tilt+Kit+65+Hp+Models&yid=34239&mid=34240&sid=35522

These are not covered in the main motor manual. Can anyone point me to paperwork for these? And/or fill me in on what fluid is supposed to be in them and where the fill and drain fittings are located?

Thanks!

• This topic was modified 5 years, 11 months ago by amuller.

[fleetwin]

Yeah, that accessory won’t be discussed in the OEM service manual, even though the kit IS OEM….I don’t think OMC published any sort of service literature for this kit either, could be wrong but don’t think so…
Use the OMC power trim/tilt fluid or dexronII transmission fluid. Fill it in the fully tilted up position….

[amuller]

Thanks. This is helpful.

The wiring looks simple enough, but no fuse or circuit breaker is shown. Some of the other tilt/trim kits show a 30 Amp fuse. Does this sound right?

Apparently these simple tilts were used on short shaft 3 cylinder motors up to 1988.

Now the interesting part: This stuff has been installed on an 85 hp 4 cylinder (not by me). The lifting lever seems to fit. But this is maybe more weight than the setup was designed to lift? What do people think?

am

• This reply was modified 5 years, 11 months ago by amuller.

[frankr]

As far as I know, the V-4 power tilt kits incorporated a hydraulic cylinder that replaced one of the shock absorbers.

[amuller]

Correct. But the motors have pretty similar legs and the previous owner was able to attach the lift arm to the V4 with some bodging. He says it worked but I’m wondering.

According to the service manuals the 65 hp 3 cylinder weight 212 pounds and the 85 hp V4 weighs 252 pounds. so that’s an increase of 40 pounds or about 20 percent. Not sure what that would translate to in force on the lift cylinder….

[frankr]

Well hey, if it works…..?? The tilt cylinder can only exert a certain maximum force. As demonstrated if you apply power when tilted. It just opens some kind of relief valve and mashes down.

[fleetwin]

And yes, many of those early tilt wiring harnesses were simple, used no solenoid or fuse….

[amuller]

No problem to add an inline fuse, but the design seems to violate good electrical practice.

I do like the simplicity. Have a mercury tilt (/trim?) on the bench that’s quite a rats nest of hoses and wires.

[amuller]

OK so I ran it on the bench and it works. There is a fill plug about midpoint on the housing. What position should it be in to get the correct fill? Fleetwin said “Fill it in the fully tilted up position….” Never having seen one of these mounted I’m not sure what that corresponds to.

Also, the parts breakdown shows a manual letdown valve. There is a slot in the center piece. Does that get turned with a screwdriver or is there more to know?

Thanks!

• This reply was modified 5 years, 11 months ago by amuller.

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