Re: [OMC-Boats] OMC-Boats Digest, Vol 45, Issue 5

From: tklauber@...
Date: Sat, 26 Feb 2011 18:05:20 -0500

Spot on Ethan. I bet it is the hammer blow spring. I had one of the rolled
pins in the tilt worm shaft break in the 69 Rogue when I first got it and
the metal fragments did some damage to the brass worm gear. I cleaned it out
and put in a new shaft and pin and it has done well these last few years. It
would not go up or down as the worm gear was disconnected from the worm gear
shaft. You need to get friendly with that tilt motor. It is in a bad spot
especially if the bilge floods often. There is a gasket between the tilt
motor and intermediate housing too. Snoop around and see what you find. Like
Ethan says expect parts to go flying when you do the dissembly. You got a
little kid there at home that can get in small places?! The bilge is usually
pretty crappy too. I see plenty of hammerblow and springs on ebay. I have
picked up a few at give away prices but you need to be patient. Most sellers
look them up in the price book and try and sell them at current prices which
is 50 bucks or more probably. They usually don't sell at the higher prices.
I am seeing some pretty good stuff on ebay BTW. There are a few dealers that
have a bunch of stuff they are trying to get rid of and the prices are very
good. You gotta look for a while. It is like shopping in an OMC store every
day. You never know what you will find. No I do not work for ebay. I am just
cheap! TK

-----Original Message-----
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Sent: Saturday, February 26, 2011 12:00 PM
To: omc-boats@...
Subject: OMC-Boats Digest, Vol 45, Issue 5

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Today's Topics:

   1. Re: Tilt Motor Issue (Ethan Brodsky)


Message: 1
Date: Fri, 25 Feb 2011 18:48:08 -0600 (CST)
From: Ethan Brodsky <brodskye@...>
To: Paul Hamilton <prhamilt@...>
Cc: omc-boats@...
Subject: Re: [OMC-Boats] Tilt Motor Issue
Message-ID: <alpine.DEB.1.10.1102251836090.23691@...>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"

On Thu, 24 Feb 2011, Paul Hamilton wrote:
> I have been away from the list for time - it's good to see familiar names
> putting information
> out there. ?In my time away, I've picked up 67 Rogue in very nice
> condition and a 67 Sportsman
> that's pretty good as well (I started with a 66 Sportsman). ? The
> Sportsman has an issue with
> the tilt motor. ?It always works going down and occasionally works going
> up. ?It always works
> going up if I first turn the hand wheel a rotation or so. ?The service
> manual describes a
> "hammer blow" coupling that allows 90 degrees of rotation by the tilt
> motor before engaging the
> worm gear which allows the motor to gain speed before it has to lift the
> motor. ?Maybe the
> place to start? ?
> I should probably start by quantifying just how much the hand wheel has to
> turn to make the
> unit operational, but it's heading below zero tonight so if the problem
> sounds familiar to
> anybody I would appreciate your help.?

When you turn the handwheel a rotation or two, are you turning it in the
direction that it would turn to raise the drive, or the opposite direction?
If pre-turning it in the opposite direction helps, I'd say it is almost
for sure the hammer-blow coupling. If pre-turning in the same direction
helps, it's harder to say, but it's also a good spot to suspect.

I would start by removing the cover from the tilt clutch housing,
inspecting the clutches (in-place, no need to remove them), and relubing
everything. You will probably need to replace the gasket when you do this
- they're a few bucks at or you can cut one out of gasket
material. Note that reassembling it without the gasket WILL NOT WORK - the
gasket is necessary to space out the cover, and without the gasket the
entire assembly will seize up.

After that, I'd check out the hammerblow. You access this by removing the
tilt motor from inside the boat. I hear this is very easy to do with the
L-4 engines, but on my V-6 it is very difficult to reach. You will
probably spend 30 minutes standing on your head working the bolts out. I
modified a nut driver to better fit mine. When you do get the bolts out,
carefully pull the tilt motor out. Note that the mounting bolts hold the
motor together, so it is possible for it to fall apart during removal (I
dropped the rotor out of a new motor into the bilge that way). Also be
careful about losing parts to the hammerblow coupling when you remove the
motor. One half tends to stick to the motor and the spring will stretch
and then pop loose and fling parts all around your bilge.

The coupling consists of two metal pieces with a spring between them. I'm
suspecting your spring has failed - the spring pushes the coupling into the
"unloaded" position, so the motor can rotate freely as it spins up. When
you hit the tilt button, the motor turns 90 degrees and then the two halves
of the connector engage and turns the worm gear shaft that drives the
tilt clutch. Without the spring, they'll just remain in their "last used"
position, so the motor faces full load at zero speed.

I believe a new spring only costs $5 or so (and it might've just gotten
disengaged and still be fine) - the entire coupling is over $50 (I thinking
it might be $45 per side). I think I ordered mine from Seaway Marine in


<a href=""> Ethan Brodsky </a>
OMC-Boats mailing list
End of OMC-Boats Digest, Vol 45, Issue 5
Received on Saturday, 26 February 2011

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