Had a problem over the weekend.......spun the prop on the counter rotating engine of my twin '95 175 Johnsons.
While determining if my prop was spun, I was trying to spin the prop CW while in fwd and it was locked as expected but also seemed locked in the CCW direction. Wasn't expecting that.
I removed the prop and it was definitely spun.
Is what I described normal for a counter rotating engine? To be "locked" in both directions when in gear?
How did you determine the hub was spun?
When under load the RPM's would increase GREATLY and propulsion would decrease......Originally Posted by Bassmeister
And when I removed the prop it was evident that the rubber was compromised.......looked twisted.
Yea under engine load they will slip.....but turning by hand is a different story unless it's completely blown out....
When in neutral the prop shaft spins freely in either direction,
when in gear (fwd or rev) the prop shaft seems "locked" in either direction.
I believe it should click/ratchet in one direction and lock in the other when in fwd and the opposite in rev.
Seems to shift ok but I'm concerned........
Any thoughts?
No sir..when it's locked into gear it's there...the clutch dogs are angled to allow it to slip into gear....but once in gear it's locked you're fine....
Shouldn't only be locked into gear in 1 direction and ratchet/click in the other?
It should lock in to gear in either direction no ratcheting.
Is this condition for counter rotation only?
I'm almost positive a std rotation acts like I described above......only locks in 1 direction in fwd or rev.
Same action whether it is std or counter. No ratcheting positive lock in fwd or reverse. If it is ratcheting then the shift rod adjustment is out of whack or the shift cable needs to be adjusted. Don't confuse a Merc that may ratchet with an E/J case.
I am comparing it to a Mercruiser Alpha one OD.....have rebuilt 1 before.
When I checked my std rotation engine I thought it reacted as I described......need to re-check.
Is the dog clutch not back cut on the E/J like the Alpha OD?
Just went down to the boat to re-check.
Shifted the std rotation into fwd: locked CCW, ratcheted CW; rev: locked in both directions.
The counter rotation locks in both directions in either fwd or rev.
What does this tell me?
That either the shift rod or the cable needs to be adjusted so it doesn't ratchet. the Alphas will ratchet.
So you're telling me my counter rotation is correct and the std need adjustment?
Want to make sure I understand correctly.
I just re-read your post. The standard rotation motor will lock in forward at clockwise, the counter rotator will lock it fwd will lock CCW as it has a left handed prop. That one will have a C in the model number. The counter will lock in reverse just like the standard the only difference is the props thrust.
This is getting very confusing.
Should the prop lock in both directions when in gear as you previously stated?
Yes sir and as I previously stated.....
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