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Imco SC no forward gear

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Old 08-08-2010, 03:32 PM
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Default Imco SC no forward gear

OK, need some help here. Cruising along at about 60 when all of the sudden lost forward in the stbd drive. No noise. Drive still has reverse, prop spins freely in neutral, feels a little tighter than the port drive but no binding, spins smoothly. Where do I start to look? Big weekend coming up.
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Old 08-08-2010, 04:45 PM
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Drain the oil and see what the magnet looks like,then pull the top cap and see.
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Old 08-08-2010, 04:53 PM
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I can drain the oil no problem. Do I need to do anything special to replace the top cap after removing it? Can I remove it without removing the rear cap?
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Old 08-08-2010, 08:48 PM
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Check to see if it just a busted shift cable doesnt sound like coupler scince you have reverse
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Old 08-08-2010, 08:58 PM
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Pulled the top cap and plug. Lots of metal in both. Need to get this fixed by the weekend? Probly not going to happen?
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Old 08-09-2010, 06:39 PM
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That sucks fireboat did new motors tear it up
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Old 08-09-2010, 09:42 PM
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sounds like the cone clutch slipped
since you are in philly I have two imco sc uppers if you are interested
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Old 08-10-2010, 09:12 AM
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Pretty sure my hammer hand is the issue combined with the new engine power. The acceleration on the boat now is incredable!

Larry I might be interested in those SC's if the priice is right. Shoot me a pm with your bottom line. Having spares would be great to have around! I think the drives are going to be my weak link and I can't afford the SCX's anytime soon.
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Old 08-10-2010, 11:30 AM
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Yeah, I just pulled mine off today, needs upper gears BAD. Well one upper gear anyway, cant see the pinion gear.

I was hearing a rattle upon takeoff, I thought it was a bad gimble bearing rattling around, pulled the drive off, the gimble bearing is great, but the gears are chattering like a mofo. There was so much play in them that when taking off in low RPM it was chattering bad. I guess 82 hours behind 800hp single vee isnt too bad.
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Old 08-10-2010, 01:14 PM
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Just got a call from Kurts. Literaly tore the teeth off of the forward gear and imbedded some in the case, split the pinion gear. he thinks the case can be saved but needs some work on it and a whole set of gears etc. Maybe we can get a deal on buying gear sets in bulk? Anyway, looks like the weekend is out. Time to start saving for a set of SCX uppers.

Nobody making a better set of gears? Whats the point of a heavier SC housing if it's the same XR gears? Drained the oil in the other drive that we put a used set of gears in and the magnet had the usual fur on it. I can see that this is going to be an ongoing problem.
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