66 'rude 9.5/ clutchdog or spun hub???

i spent all duck season just running a little past idle,was told dealer couldnt get clutch dog for a motor that old, he told me i might be able to take the c-dog off and turn it 180 degrees and that might work, so i got into the lower unit and the clutch dog seemed to be just fine( it had a little wear on it but it didnt look like it would be enough to slip out of gear. i flipped it over like he said and put it back and got it all back together, then i put it in gear(not running) and tried to see if i could turn the prop and see if it would catch or pop out of gear, when i turned the prop it turned with a little force but the dive shaft didnt, so im assuming the prop is bad? if it is the prop than that makes me feel better, but the one question i have is if it is the prop than should i get back in there and turn the clutch dog back the way it was??? thanks for your time!

Re: 66 'rude 9.5/ clutchdog or spun hub???

On the one hand, if it isn't badly worn, it's better to keep parts in positions they've become accustomed to. But if there was one part in that motor where it wasn't so important, it'd be that one. Flip a coin. Get a prop.<br /><br />When a prop hub is spun, it slips rather smoothly. When a clutch dog goes bad, it Klunks...Badly. (I have no idea why they call it a "clutch dog". Aren't clutches made to disengage and reengage smoothly? Gear cogs don't disengage and reengage smoothly!)

Re: 66 'rude 9.5/ clutchdog or spun hub???

Hi, Willy.<br /><br />"Dog" clutches are in-or-out, no slip. That is why the part is called a "dog". <br /><br />That is also why it clunks if it drops out.

Re: 66 'rude 9.5/ clutchdog or spun hub???

There's no hub to spin on that motor (pin drive).

Re: 66 'rude 9.5/ clutchdog or spun hub???

not sure what you mean ledgefinder? i guess that what you mean by pin drive is the shear pin on the drive shaft that the prop slides on to, well i can physically turn that prop when in gear, and the hub on the prop doesnt spin. isd it possible that the owner before me put on the wrong prop

Re: 66 'rude 9.5/ clutchdog or spun hub???

No, I must be wrong. I thought all pin-drive props were solid hub. If you can spin the prop without the propshaft turning, obviously the prop is messed up.

Re: 66 'rude 9.5/ clutchdog or spun hub???

legfinder - OMC props have been rubber hubbed since at least the '50s. They're really hard to see on some of them though. Check this '52 ad out, lower left side.

Re: 66 'rude 9.5/ clutchdog or spun hub???

i have afew of these props and motors these hubs can spin they are not 1 peice if you look close you will see that the center of the hub where the pin goes is not aluminum its bronze or a brass color. all mine are. from time to time you will see a prop on ebay cheap. i got a few diffrent sizes off ebay to play with and see what makes my motor proform the best with my boat.<br />there is 1 on there right now here is the link i hope this helps you <br /><br /> http://cgi.ebay.com/ebaymotors/ws/e...6456&item=2457647365&sspagename=STRK:MEBWA:IT

Re: 66 'rude 9.5/ clutchdog or spun hub???

Should the prop turn out to not be the problem, here's some info that may help:<br /><br />If the clutch dog is worn, it is possible for it to "slip", but when it does it'll do it with a loud banging noise, and the motor will jump noticeably. What happens is the contact edge of the dogs round off and don't make adequate contact with the matching dogs on the forward gear. They slip off and turn "no-load" 1/2 a revolution, and then re-engage with a loud bang, when they contact the next set of lugs on the face of the gear.<br /><br />The 2-lug clutch dog were sort of prone to this, but it usually happened with the torquey 25 & 30 horse models.<br /><br />It is possible in some cases to take the clutch dog off & reinstall it 180 degrees, but that may really be only a band-aid fix. Basically, what you're doing is using the lugs from the reverse side, which typically have much less wear. If the lugs on the forward gear have begun to round off too, it'll happen again.<br /><br />I looked up a 1968 9.5, which should have the same internal parts as yours and it turns out the clutch dog is available - p/n 377458 was the original & it supercedes to 329795 (about $90). The original forward gear, p/n 378179 is also still available - it's pricey though, nearly $200 bucks. A close inspection of the gear lugs and clutch dog will tell you what you really need - they should both have nice, clean sharp corners, any sign of rounding at the mating surface is not good.<br /><br />Hope this helps.<br /><br />-John