Thanks! - what that does tell me is that the lower & upper are farther apart on the three-gudgeon than on mine, for sure. Just measured mine from keel bottom up. To the horizontal flange it is 7.5" to the lower one, 29" to the upper, 21.5" in between. The upper one is about 7" down from top of transom - only a little above the bottom of the motor cutout. Your upper must be almost at the very top of the transom...? I can see from that rear picture of Sweet Pea that his is snug up to the top. cheers, John S. On 02/01/2016 11:05 PM, GILASAILR--- via montgomery_boats wrote:

Bottom side of upper to top side of middle - 14 15/16 inches - bottom of middle to top of lower 15 1/8 inches. Middle is flange down. Sorry -I didn't see your request for measurement order til typed as above. This is from a 1980 model #316

GO

In a message dated 2/1/2016 11:34:02 P.M. US Mountain Standard Time, john@eco-living.net writes:

Hi all,

Rick (of many rudders :-) is selling me his original slide-up rudder for my M-17. I currently have the early version balanced one-piece rudder, no sliding, no kick-up, only two gudgeons.

So I'll need to install a middle gudgeon, and, see if the spacing on the top and bottom already in place is the same as the OEM three-gudgeon installation.

1) Could someone who has the original sliding rudder M-17 with three gudgeons in factory location measure their spacing and post the measurements? I think starting from bottom of keel at rear of boat and measuring up to the horizontal piece on each gudgeon would be an accurate way to do it.

2) Is the middle gudgeon mounted bracket up, or bracket down (and does it matter functionally or structurally)?

3) I'll need one more gudgeon matching my dimensions. I assume they're same as three-gudgeon models but will measure and post. Does anyone have a spare (used or new) for sale for my third?

When I get her in the water again I'll be able to compare the two "original" rudders head to head - first generation and second generation, as it were.

thanks, John S.

-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com