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Old 06-22-2011, 07:09 PM
weremeer weremeer is offline
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still have reversing gear problems.

During the spring,while hauled out I tried fixing the reversing gear. I had difficulty taking off the rear nut, thinking I would just buy the whole thing from Moyer and put it back in, but it was harder than that. I got to the point where I took the engine out of the boat to work on it. I had difficulty getting to the reversing gear from a sail locker in my C&C 29, feet twisted under the motor (falling asleep) so I took it out and put it in the main cabin. I got everything aligned while in the main cabin. I got the plates into the groves, and the thing going smoothly into forward. so I put it back.
well last month I went into the water, put it into forward and the gear shifter went into place, but as I gave it gas, I only went one knot max. Fortunately I had a breeze and sailed to my mooring. I got to the mooring to see what it could be, I thought I may have had a rope around the prop. or my martec folding prop wasn't opening. but that was not the case. I put it in gear and I was able to move the shaft. It seems something is missing. I got the reversing gear tape but It did not address this problem. Help. I wanna go sailing but I want to have the motor just in case.... I live on Long Island and sometimes the wind dies and I dont go.
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Old 06-22-2011, 07:19 PM
smosher smosher is offline
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there's a 3/4 " nut that is used to adjust the reverse band. remove the transmission cover and its right there. With the engine in neutral turn it to the right 1/4 turn at a time, put the cover back on and try. A small adjustment makes a big difference.

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Old 06-22-2011, 08:28 PM
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Al Schober Al Schober is offline
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Sounds like you have a problem in fwd too. I'd address that before attacking the reverse problem. I'd be curious to know what your RPMs were when doing one knot. If you put it in gear, engine off, and can turn the shaft by hand, then I'd snug up the fwd adjustment. ONE notch at a time until it doesn't slip. Dockside, I think I'd adjust it until you can't turn the shaft with a screwdriver shoved into the coupling bolts, then take it to sea and try it. Repeat - ONE notch at a time!

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Old 06-22-2011, 10:09 PM
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TomG TomG is offline
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Weremeer, sounds like you are slipping in forward. As Al says, tighten the adjusting collar ONE notch and then see where it gets you. If that isn't enough, you might need to go ONE more notch. It should be quite difficult to get the shifter into forward. If forward engages easily, I would suspect this to be a problem. I went through this very exercise last month. I had to take the cover off the gearbox about a half dozen times to get both forward and reverse where I want them, but it was worth it. The MMI manual mentions a way to set the gearbox. Find neutral first, then set forward, then finally set reverse.
1977 Tartan 30
Repowered with MMI A-4 2008
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Old 06-23-2011, 11:24 PM
weremeer weremeer is offline
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Thanks. I will try it as soon as it stops raining.
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Old 06-25-2011, 04:14 AM
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jpian0923 jpian0923 is offline
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Maybe this will help

S/V "Ahoi"
1967 Islander 29
Harbor Island, San Diego
2/7/67 A4 Engine Block date
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Old 06-25-2011, 12:09 PM
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I think the guys are right.

a)Adjust the forward notch one slot at a time until you have a good indent ( the indent should click down but not forced down. It should feel like shifting a manual shifter in an old pickup...just a click and it stays there). Should not require force....just a click.

b)Tied to a dock, put under forward power and see that she is moving water and no slippage noted.

c)Then try your reverse. If it doesn't catch right away don't fret. 3/4 inch wrench on the reversing gear nut click at a time and try it until it winds up in about 2 or 3 seconds. (ensure you oil is topped up to normal safe level when setting this up so that the adjustment is not interfered with by a lower level).

d)Once you have that set to where you think it should be do this. Remain tied to the dock.

1. check forward...indent as described above, no slippage, moving water.
2. check reverse...ensure it grabs...should hear engine rev then slow as it binds 2-3 seconds. At this point you should hear the reversing gear engage and she starts to move water.
3. check for a neutral position. This might be very small (likely will be) on your shifter. Keep moving the shifter slightly until you find a position where the shaft stops turning. (check point is watching the shaft turn inside the boat at the end of the engine).
4. mark that spot on the shifting console / binnacle with a piece of yellow tape (that's what I use) so that you know exactly where neutral is.
5. Put the cover back on with gasket and check for leaks.
6.Recheck oil level if any spilled/ splashed.

Note: I put the cover over the gear box after with a couple of snug bolts when checking. It does throw oil around during the run-up so ensure you don't make yourself too much mess. I figure it's a 2 beer job (I mark time in sipping a beer as we do it!)

Good Luck.

1976 C&C 30 MKI

The pessimist complains about the wind.
The optimist expects it to change.
The realist adjusts the sails.
...Sir William Arthur Ward.

Last edited by Mo; 06-25-2011 at 12:31 PM.
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