Transom extender on a Mac26x

[TortugasRoyal]

Move it all back 2 to 3 foot, engine and rudders, and have a platform? Wonder how much my fuel economy will increase with the prop in clean water?

http://continuouswave.com/whaler/reference/engineBrackets.html

http://www.ifish.net/board/showthread.php?t=288623

http://dadmarine.com/competitors.html

http://www.hermco.net/pricing.html

http://www.marineparts.com/mpf/mpf898.aspx

http://www.ebay.com/itm/USED-STAINL...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

http://miami.craigslist.org/pbc/boa/3621036466.html

http://miami.craigslist.org/mdc/boa/3624635759.html

 

[MrBill_FLL]

-not sure the hull can take that. *but works great on powerboats. makes a 20' ride like a 23'
also not sure about the rudders on an X.... (interference)

 

[MrBill_FLL]

I have seen some nice wooden 'swim platform' for X's it went over the rudder controls. raised up about 2" over the floor. -did not extend past transom.

 

[centerline]

it will most definitely upset the initial balance of the boat, and with the motor being mounted on an extended bracket on a sailboat, the rocking of the boat will be lifting the prop clear of the water more often, and then dipping the motor in the wave as it settles back down.
i have a 10hp honda with a standard length shaft and with it mounted as most are on a swing bracket, i have to get the height just right to keep the prop in the water without the motor getting dipped.... if it was extended out another couple of feet, i think it would either lift the prop out or dip the motor.... and this is on a boat with a bit of a keel.. on a 26 i think the rocking action would be a bit more pronounced due to the lack of a weighted keel to dampen the effect...

but then I know nothing about the shape of the hull near the transom on an X model.... its possible that they were designed with a motorboat transom, which would keep them from having such a pronounced rocking effect

 

[MrBill_FLL]

I think if (HUGE IF),,, the transom/ hull could take it, the bracket could work.
*however the engine cowl (cover) now sits lower in the water. that seal needs to be perfect! often we would see water wash over the cowl of the OB.

 

[TortugasRoyal]

May I have some suggestions regarding fabrication of this transom extender please? A & J Marine Welding has a sale, gonna cost about $1k

Gonna stick with one outboard, not twin, and it will have a deck.
Should it be floatation type or not or no concern?
How far set back/extention should it be? 18"? 24"? Need at least 14" to fit the relocated rudder cross member and pieces. and longer=more potential to raise outboard.
At least two 4"x8" flanges on rear of platform to relocate/mount the rudders.
Platform can be around 48" to match the stern opening or should I match width of boat.
May have a raised removable aluminum plate over the rudder crossmember pieces, steering cable, power cables etc. so platform remains user friendly.

 

[MrBill_FLL]

I'd need to know more about how the macgregor transom was built and connected to the hull...

in a powerboat its pretty straight forward. ~2-3" think plywood transom wrapped in f-glass connected to the keel and sides with thick mat. the boat is designed to take a lot of stress to the transom.

I would think the transom is strong, but not sure about how thick the mat is on the bottom or sides. -can you access that area and add more mat? (I would).

-that's the key. keeping the transom connected to the boat. With a bracket you'll be adding more of a lever action to the engine/transom. and if too much, it will crack. probably where it connects on the sides or the bottom.


-on the macgregor-sailor.com board, theres a guy 'Billy' from NC IIRC, that put a 140 suzi on his X. Think he added some mat to the transom. might try to talk to him or others more familiar with the x construction.


its going to lower the stern a bit, and won't help its sailing. not sure if it will plane or ride better, since you only have a 50hp. if you had a 70hp, I would think it would ride better.

-just my opinion..... Good luck.

 

[MrBill_FLL]

ps: I have seen transom's separated from the hull/ sides/ deck...

I ended up partners on a wellcraft 20' (w/ 200 merc), when they ran it aground (fast) and broke the transom from the deck/ sides. (keys)

I glassed it back together with the biaxal glass...


-How thick are the sides where they connect to the transom? and can you add more glass? (I would).

 

[TortugasRoyal]

-on the macgregor-sailor.com board, theres a guy 'Billy' from NC IIRC, that put a 140 suzi on his X. Think he added some mat to the transom. might try to talk to him or others more familiar with the x construction.

found it!

http://www.macgregorsailors.com/modt/index.php?view=940

http://www.macgregorsailors.com/forum/viewtopic.php?f=8&t=11426&p=133794&hilit=#p133794

http://s2.beta.photobucket.com/user/Chamelea26X/library/Mods - Transom