Topic: 1971 Johnson 9R71R Tilt Mechanism – Antique Outboard Motor Club,Inc

This topic has 10 replies, 5 voices, and was last updated 9 years, 7 months ago by fleetwin.

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September 30, 2015 at 11:16 pm #2674
Buccaneer
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Just picked up a 1971 Johnson 9R71R auction parts motor today
for $23. It’s froze up but nice and clean under the hood, and I’m
hoping it’s lightly stuck from sitting in a pole barn for too long.
I have the engine on a stand, and wanted to tilt it up to spray
lube in the cylinders, etc., but can’t get the tilt lock to release.
I’m not familiar with the model outboard, but presume one just
pushes down on the tilt lock button (#16 in the diagram)
http://www.marineengine.com/parts/johns … rn+Bracket
and pull the motor up?? Am I missing anything? I hosed it down with
WD-40, but it seems jammed up tight.

Any ideas?
Thanks, Buccaneer

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September 30, 2015 at 11:42 pm #24943
retiredoz
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I’d loosen up the pivot bolt for starters. If memory serves, the tilt lock should just pull clear of the adjustment pin when released. If it does, you could probably get the tilt bracket to move by prying on it.
September 30, 2015 at 11:59 pm #24945
fleetwin
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You may have to pull that lever out, not push it in to release the tilt lock, can’t remember. Or, you could just reach in and push the tilt lock bar out of the way so the engine will tilt down. Usually, you need to tilt the engine up slightly to release pressure on the mechanism so it can be moved out of the way though.
October 1, 2015 at 12:10 am #24948
frankr
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Wrong! Pull out on #16 after it is tilted to hold it in tilted-up position. You can’t move #16 when not tilted. Motor must be in neutral (or forward) to tilt. Should come up easy and the ratchet gizmo (#36 & 53 and stuff) gives it some friction while tilting back down. If it doesn’t release in neutral check the lever and rod assembly that is attached to the shifter shaft (rod goes down through the steering swivel pin). Those motors are notorious for breaking the upper front rubber motor mount. That could be messing up the tilt release also.
October 1, 2015 at 1:51 am #24954
Buccaneer
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Thanks for the tips! Will try again tomorrow. Perhaps I could take it
off the stand and turn the motor upside down on my rubber mat so
I could see better what’s suppose to do what!
Did try tilting while in F, N, and R.
Tilt pin adjustment on the side (ratchet gizmo) says to "Push in and Turn".
Is the ratchet suppose to climb the rack as you turn, to vary the tilt angle?

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October 1, 2015 at 7:12 am #24958
frankr
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You don’t understand. It is mechanically complicated, but simple enough to use. You don’t have to do anything to tilt it except pull it up. If it won’t pull up, either the tilt bolt is frozen or the reverse lock is not released.

As I said, the reverse lock is actuated by the gearshift. Has to be in neutral or forward.

As for the tilt bolt, try loosening the nut. What I’m calling the tilt bolt is the hinge bolt (52) that goes horizontally, holding the clamp brackets on. There is a tapered friction cone (66) at one end, and that cursed ratchet gizmo (53) at the other end. Tightening or loosening the nut (58) varies the amount of tilting friction.

The push in and turn knob (64) is the tilt pin to adjust the running angle on the boat. You cannot change that unless it is tilted.

I’m not sure how well you can see the reverse lock, but it is a simple claw-like device (30) that grabs onto the tilt pin (59) (the push-turn thing) when in reverse. A thin rod (32) connected to the shifter lever pulls it up to release.

#29 is the shallow water drive. Props the motor partly tilted up to run in skinny water. You cannot move that unless tilted either.
October 1, 2015 at 7:34 am #24960
frankr
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#71 on this view is the lever that pulls the rod up to release the lock in neutral. It is attached to the stuff (66, 70, 72) at the inner end of the gear shift lever #64.

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October 1, 2015 at 11:43 am #24964
Buccaneer
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Frank, I guess logic says that the motor should always tilt
unless in reverse……. unless you want to take the transom
out of your boat when you hit a log!
Thanks for making it clearer!

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October 1, 2015 at 4:13 pm #24969
johnyrude200
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I understand the confusion with this tilt mechanism. On a side note – other than locking the motor down for those who need to go backwards (reverse) really fast, what is the purpose of the run/lock position on outboards? I mean, most of these small motors are going on very small aluminum boats or being used as kickers. Going much above idle usually results in swamping the boat. With a V-hull, they swap pretty easily, with a jon/flat boat, I can’t image you ever go faster than idle in reverse.

If the motor is staying on a trailer, I leave tilt lock OFF, and use a ratchet strap to keep the motor from fishing tailing every time you take a corner on the road.

If memory serves correct, I think I’ve had a couple of 20-25hp motors (58-76 generation) climb out of the water at WOT when taking more aggressive corners, this is while going 20MPH forward, but other than that, I can’t think of a reason to ever lock the motor into the low position. Even with the motor climbing out of the water on plane, I still wouldn’t lock it down, I’d just not go so fast.
October 1, 2015 at 4:27 pm #24970
Buccaneer
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After messing around, blowing off cobwebs, dirt, WD-40 ing,
and loosening the pivot bolt, I finally got the motor to tilt up.
BTW, it only tilts while in Forward gear. Would have thought
Neutral as well, but perhaps that’s to keep the lower unit from
popping out of the water while one pull starts it?
All the gizmos work good now…. i.e., reverse lock, tilt lock rod,
tilt pin "push in and turn knob", and shallow water lift………
now, if I can get the engine "un-stuck", I may have something!
No sign of over heating, burn paint, etc. Wish I had a bore scope
to peak inside the cylinders.

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