PO-15 Odds and Ends

[Buccaneer]

Getting closer on the PO to the moment of truth,
but need to figure out a few things, such as…..

Q. What are you using for gear lube on these?
Old article said use Texaco 950, which they implied
was "black, thick, and water proof"!
Is Lubriplate 105 okay, or should I look for some JD
corn head grease?

I’ve already put the boat away for winter, but the
test tank is full of water… at least until "ice"
becomes a problem.
Q. Has anyone successfully rigged up a garden
hose to the PO’s plumbing to force feed water
for cooling? Would be nice to run it longer
than 30 seconds on the engine stand.
Even if I got the boat back out, I still have no
prop yet anyway!

Prepare to be boarded!

[Anonymous]

#1 is JD corn head grease. White grease was a poor grease for gear cases, too thin and washes out of old gear cases.

[Buccaneer]

XR55, I had an old tube of Texaco outboard gear lube from
a flea market, and indeed, it was thick, black, and gooey.
Wish I had more! Thanks.

Is this the correct JD grease?
It says for low speed gear cases, but presume
it’s intent is for open gear cases and would be
flung off the gears in a high speed, "open" case.
Guess it the grease couldn’t go too far in an
outboard gear case.

http://www.greenpartstore.com/John-Deer … 02562.html

Prepare to be boarded!

[outbdnut2]

I used water-resistant lithium grease sold for automotive use in grease guns, also recommended for boat trailer wheel bearings. I bought it in a grease gun cartridge and then adapted the hose on the end of my grease gun to a fitting that screwed into the drain screw hole on my PO-15 and pumped it full.
Dave

[RICHARD A. WHITE]

You can run it without a prop but be careful as it will tend to be easily over revved and that would be bad…very bad…. as for cooling yes without a prop just connect the hose or 12 volt bilge pump to force water thu the opening, OR you can use the bilge pump and split the output to each cylinder.flow I think is from the bottom of the cylinder to that top. Just make 2 dummy copper water lines, and connect them with rubber hoses to the bilge pump…AGAIN watch for over revving…

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[Buccaneer]

Thanks for the replies. I haven’t heard using the water resistant lithium
grease in outboards before, but I will keep that in mind.
I would like to get some JD corn head grease to have on hand….
I’m sure someone will chime in as to "which" JD grease I need.
Part # would be great.
Sounds like I need a PO test prop. Thanks for the warning!

Prepare to be boarded!

[Mumbles]

The prop shaft bearing carrier on mine got adapted to accept a modern lip seal so it will hold gear oil. I’m not sure if the oil is a good idea as there is no seal on the pinion shaft and water will probably find its way in. 😕

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[Buccaneer]

Mumbles, I have not taken the lower unit off or apart yet.
Is there anything to be wary of? I took the exhaust chamber
and it’s outlet leg off today, as four of the eight nuts holding
in on were missing, so I figured I better take it off and take
a peek. The exhaust ports, pistons, & rings, from what I can see
are okay. Does appear that the rings are a little sloppy
in the grooves (side clearance), but guess I won’t worry about
that for now.
One thing that has me stumped is the tube in the exhaust leg
that goes up into the exhaust chamber where it dead ends.
What is it? Water cooled exhaust? If so, I didn’t see any outlet
holes in the exhaust chamber.
Thanks for the Wisdom!

Prepare to be boarded!

[Anonymous]

Yes that is the correct JD grease. The PO has a water cooled muffler that the water passage from the muffler is right next to the large hole for the exhaust at the bottom of the muffler where the exhaust down pipe connects.

[Anonymous]

The water from the muffler exits the muffler and enters a cast in passage the runs down the length of the exhaust pipe internally parallel to the the exhaust passage. If you have a JD dealer near you the dealer has a 15 minute video showing a cutaway corn picker gear box running while a hose dumps water into the gear box. The video may be available on line? Either on JD web site or poss a U tube video. The grease is none channeling and clings to the spinning gears without flinging off. The grease is made to protect gears in a wet environment.

[Author]

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