OMC electric shift slipping

[rabidfish]

To those who had a slipping problem with your 1977 and older, electric shift OMC drive:<br /><br />If your dealer can't get them(or can't find them)The spacers are available. <br /><br />I just don't remember who all needed them...

 

[John Smith]

Re: OMC electric shift slipping

Rabidfish:<br /> Thanks for you help, do I need two: one forward and one rev. <br /> Drop the lower unit or possible do everything from propeller shaft, I just did all the seals two years ago, from the manual look like I might have to remove the vertical drive shaft in order get to all the gear, spring coil etc. I still not sure exactly where this spacers go<br />Do I go to you Web or call you to order these <br /> 3-15-05

 

[rabidfish]

Re: OMC electric shift slipping

Contact me anyway you like.<br />You will need to drop the lower unit down at least.

 

[RattPatrol]

Re: OMC electric shift slipping

Rabidfish -<br /><br />I am a brand new member...out of necessity! My wife talked me into buying an older 24' searay last year. Tested the motor out of water - it ran, and the prop spun slightly at idle. So I figure it will work. Well I spent the better part of the summer refurbing the old girl - she's pretty now. Put her in the water - turned her over...but the screw wasn't spinning. It's a TRII w/electric shift. You seem to be very knowledgable about this type of transmission - can one replace electric shift with cable? I would appreciate any guidance you can give me. The Mercruiser manual I have doesn't address the electric shift. This is my first I/O - I'm really wet behind the ears, but I like to try doing this things on my own first...esp when marinas are charging $100 an hour!<br /><br />- Respectfully, RattPatrol

 

[Boomyal]

Re: OMC electric shift slipping

Originally posted by RattPatrol:<br /> It's a TRII w/electric shift.

TRII Electric shift????? what is that RP.

 

[skicat]

Re: OMC electric shift slipping

Is the drive white or black? I thought only OMC had an electric shift.

 

[seahorse5]

Re: OMC electric shift slipping

Those TR II drives go back a lot of years, and it has been so long since I've worked on them. I doubt you will find many mechanics who have heard of them, much less worked with them. They used an electric motor to actuate the shift lever on a propriatary MercTrans transmission. Try to find an old established MercCruiser dealer who may have the books on it.<br /><br />They were not very common, even back then, so I doubt there is a stash of parts or used units anywhere. Perhaps Don S, a Merc sterndrive guru, would have some insight to help you out.<br /><br />See if you can find the factory service manuals, perhaps on Ebay, which is also a good supply of parts for obsolete units.<br /><br />I wish you luck with your project.

 

[rabidfish]

Re: OMC electric shift slipping

Sorry for the delay, Just had to go fishing before the boating season gets started.<br /><br />In any case. From what I remember, those were simply (Borg Warner) Velvet Drives, with an electric shift mechanism... You can certainly convert a Velvet Drive to mechanical(cable) shift.<br /><br />If it isnt an electrical problem, and the shift lever is working, then you have a hydraulic/friction plate problem.<br /><br />Does it slip in both gears?<br />if so, probably either the oil. the pump, or the valve. To know what is wrong you'll need a pressure gauge. (0-200psi) The pump should be capable of 150psi or so. <br /><br />If just in one direction, then you probably have a clutch plate problem. <br /><br />There are good used and remanufactured transmisions all over the internet.<br /><br />Hope this helps, Good luck !

 

[RattPatrol]

Re: OMC electric shift slipping

Thanks for the input fellas - I will do some looking around on the net for manuals...then hopefully get a free weekend to get on it. You'll probably see a post from me again - I appreciate any comments.

 

[RattPatrol]

Re: OMC electric shift slipping

i am curious how to convert to a manual shift - it seems like that would be the easiest fix. We've finally got some weather that I can get out to start working on this tranny problem.