Well, almost five years later, I finally did this clutch adjustment, following 
the procedure in the Moyer manual.  The actual adjustment was pretty 
straightforward; no problems there except the contortions required to access 
the gearbox from the lazarets of a 30 MK I.  I turned the adjustment collar 
only one notch.  However it was a bit of a struggle to get everything 
reassembled.  I had to re-tap one of the bolt holes to make its bolt thread.  
And I had to disconnect the shift cable to get the starboard two bolts aligned 
through its angle iron and gearbox access plate, then re-connect the shift 
cable ensuring correct adjustment.  But, good news, last night I pushed her 
throttle wide open with five guys on board, and drove her at 6+ knots under 
power.  I haven’t been able to do that since buying the boat - before, her 
clutch would slip beyond half-throttle.

Cheers,
Randy Stafford
S/V Grenadine
C&C 30 MK I #79
Ken Caryl, CO

> On Sep 3, 2016, at 9:53 AM, Ken Walters via CnC-List <cnc-list@cnc-list.com> 
> wrote:
> 
> Randy,
> Probably a pretty straight forward  adjustment in the gear box. Mine did this 
> when I bought it and a knowledgable A4 mechanic fixed it in about an hour 
> after unknowledgeable mechanics dorked around for many hours on cables, 
> props, etc. and many hundreds of dollars. There is definitely help to be had 
> on the Moyer forums for this exact issue. It is also covered in detail on the 
> Moyer A4 overhaul manual.
> 
> If you are handy you can fix it yourself in about 30 minutes. You take off 
> the gearbox cover plate, remove a set screw that holds a clutch ring/collar 
> thing in place, rotate ring one way or the other one notch, put screw back 
> in, do not drop screw down inside gearbox, test it out. It may make getting 
> the engine in or out of gear a bit harder, there is a trade off. There is 
> also an after market collar with notches closer together to avoid the too 
> much too little issue.
> There are times when you need to know that you have maximum thrust - like 
> when you are about to ram another boat or dock. To my mind this is a serious 
> safety issue. A young, strong crewman fended my stern off when this happened 
> to me while backing out of my slip in high wind. I parked the boat 
> immediately and called a yard with A4 experience.
> If you cannot find the adjustment instructions on the Moyer site, contact me 
> off list and I will send you a PDF.
> Ken
> 33-1 '75 A4
> 
> 
> 
> Created on a small keyboard with fat fingers...
> 
> 
> On Sep 3, 2016, at 11:17 AM, Josh Muckley via CnC-List <cnc-list@cnc-list.com 
> <mailto:cnc-list@cnc-list.com>> wrote:
> 
>> You may find that the engine is moving independent of the shift cable.  With 
>> older/softer engine mounts the thrust may be moving the engine 
>> closer/further from the cable.  Most cables are attached to the engine so 
>> this doesn't happen but if the cable of mount is broken or failing it may be 
>> causing the problem.  Get a partner to create the problem while you are 
>> watching the engine.
>> 
>> It could also be as simple as adjusting the cable.
>> 
>> Josh Muckley
>> S/V Sea Hawk
>> 1989 C&C 37+
>> Solomons, MD
>> 
>> 
>> On Sep 3, 2016 10:23 AM, "Randy Stafford via CnC-List" 
>> <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:
>> Listers-
>> 
>> My Atomic-4 slips out of gear in forward if I open the throttle too much, 
>> especially under heavy load. It's not really a problem, because I don't need 
>> that much throttle. But I'm just wondering if this a common and fixable 
>> issue, or a safety feature, or what.
>> 
>> Cheers,
>> Randy
>> 
>> Sent from my iPhone
>> 
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