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Hi, I aquired a old Glastron with the AQ270 drive. I am having quite a time adjusting it so BOTH F and R fully engage. One thing I have noticed is the prop does not engage till the last quarter inch of travel of the control mechanism. Is this normal? Thank you for any help.
Ricardo, thank you. 2 things number
1 what part is the gear yoke number
2 I noticed that on my left hand drive unit my linkage is on the left side of the concentric piston and not on right as the shop manual shows.
Ricardo, I have a lefthand prop with CCW rotation. the verticle rod is on the portside of the Eccentric piston. How is this?
With any AQ series drive, a shift into FWD gear is always a result of the shift cable extending at the gear yoke.
When the gear yoke is moved AFT, the vertical linkage is pulled downwards.
If the vertical linkage is connected to the Port side of the "Eccentric Piston", it moves the sliding sleeve upwards.
An upwards move of the sliding sleeve engages it with the upper driven gear "gear cup".
This results in a CCW prop shaft rotation for any single prop lower unit.
Is it possible someone before me nstalled the Eccentric piston upsidedown?
It is impossible to install the eccentric piston upside down (180 degress out of phase) and yet allow for complete installation.
If it was installed upside down:
a....... the shift shoe socket would be swung to the Port side of the sliding sleeve groove.
b....... the neutral detent pin would be swung to the Port side.
All of the geometry would be incorrect.
Eccentric piston showing shift shoe socket on Stbd side.
https://encrypted-tbn2.gstatic.com/...Y045Hy01dnuIncpL8lya02QDNLJFOa6hLsIkBQg5taUP1
Bottom line...... you'd not be able to install the shift mechanism if the eccentric piston was 180 out of phase.
And with this has some effect on why I cant quite get shifter adjusted.
First.... pull the shift mechanism and examine the shift shoe. Once in a while, we'll see these broken.
You'll need on new O-ring.
If up for the task, also replace the eccentric pison seal!
(NOTE: this seal is directional!)
Also, make dang sure that the shift cable clamp is tight.
SEQ # 32 here.
Now start with the shift cable disconnected from the gear yoke (SEQ #2 above) .
Place the eccentric piston in the neutral position.
Loosen the clevis locking nut. (SEQ #19)
Disconnect the vertical rod (SEQ #17) from the gear yoke.
Swing the gear yoke full in both directions, and learn where it touches the Intermediate housing.
Divide this travel so that you know where the gear yoke is in the middle of it's travel.
With the helm shift unit in neutral, reconnect the shift cable to the gear yoke.
Again... make sure that the gear yoke does not bottom out anywhere during a shift in either direction.
Play with the vertical linkage rod length (clevis adjustment), and adjust for absolute neutral of both the eccentric piston and the gear yoke.
Ricardo, I have a lefthand prop with CCW rotation. the verticle rod is on the portside of the concentric piston. How is this? Is it possible someone before me nstalled the concentric piston upsidedown? And with this has some effect on why I cant quite get shifter adjusted. thanks
Apparently at some time in the past a "black drive expert" incorrectly setup the shift lever vs prop rotation setting by changing the "sense" of the shift cable at the control head instead of at the drive.
Bob, those darn Black Drive eperts!!!!!
I wish that they'd keep their paws off of the AQ series drives!
Per Ricardo... shift cable should extend at drive end when shift lever up front goes into FWD. Start by fixing that, otherwise reverse interlock will never work correctly.
Bob...... good point.
FYI for you Black Drive Experts who turn a wrench on an early AQ:
If the cable direction has bee reversed, the coupling rod will be depressed (and the lock brace activated) while in FWD gear.... not while in REV.
If this drive was to encounter an impact, the latch hook over-centering springs will not release...... (well, at least not without tearing something up).