Spent Saturday night rebuilding my old Outback Mirage Drive Unit. I replaced a sprocket shaft, sprocket, and sprocket bushings. Had to remove the sprocket guards from the old sprocket. Inserted them on the new sprocket and used some gorilla glue to lock them in place. It worked real well. I lubed everthing up with water repellent grease. Reconnected all the cables and tightened them up and set this unit aside to be a spare.
Went out Sunday and enjoyed a leisurely trip. It sure felt good to be back pedaling a kayak. When almost back to the launch site, I decided to test out the spare drive unit. I couldn't believe the difference in the drive units. The one I just rebuilt worked so easy compared to the new unit that had a new rubber sail on it.
Spent this evening taking apart the new drive unit, cleaning everything and lubed it up with water repellent grease. I noticed a couple of links in the chain not rotating properly - tight links. Tried to work some WD-40 into the links and hope this will make it easier to pedal.
Answers to my own questions posted about two months ago:
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The new pedal sail mast isn't connected to the sprocket by a cotter key (pin) like the old one, it is attached by a set-screw. Does that mean the spare masts I have with a cotter pin hole won't work in the new drive unit?
That is correct. If you have a pedal unit with a cotter pin holding in the rubber fin mast, you need a mast with a hole in it for a replacement. If you have a pedal unit with set screws holding in the fin mast, you'll need a mast with a notch in it.
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Where can I get spare masts (set-screw kind)?
Dealers here are not familiar with the differences of parts because they go by a parts catalog which does not reflect current design changes. I had two different parts, same part number - one noted as "old" and one noted as "new." I'm sure this parts confusion will eventually be resolved.
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Does the new Mirage Drive unit have sprocket bushings?
No the new Drive Units do not have sprocket bushings.
The old steel sprocket has been replaced with a composite sprocket that serves as it's own bushing. What is interesting is the gears are made from composite material. Metal chain against composite (plastic) gears? Only time will tell how these two different materials interact when in contact with each other in water that has grit and sand floating in it.
To those concerned, I am not trying to paint a negative image of the Outback or Mirage Drive Unit as one Hobie manufacturing rep insinuated to me in email.
I am relating my personal experiences with the Mirage Outback. These experiences can serve to provide Hobie with continuing feedback on their great invention and hopefully help others avoid some of the troubles I've had. Experiences will vary widely from person to person.
I am not encouraging anyone to grab wrench and vice grips to take apart their drive unit.