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HP 100CC question

Posted: Sun Aug 06, 2006 9:55 pm
by secross2
I would like to say it's nice to see the board is still in great shape. I haven't been on for some reason :| any way I searched and came up with 156 matches and I'm just wondering if I was to place a 100CC outboard on my X would it cause problems. I'm thinking of moving to a powerboat but am not willing to give up the X. Plus if I want to sail again I can just rig'her up and be on the way.
Thanks in advance. :macx:

Posted: Sun Aug 06, 2006 10:18 pm
by Frank C
You surely must mean a 1,000 cc outboard rather than 100 cc.
Roger recommends a 50 hp outboard; the Mercury Bigfoot 50 hp is 998 cc ...
What's the question again? :?

Posted: Sun Aug 06, 2006 11:01 pm
by secross2
Oh Frank you got me, I meant 100HP, my wife wants to powerboat and I want sai :P
Anyway thanks, I've read that it throws the displamement? off but I'm not really understanding how that minimal weight different can effect her that much.

Posted: Mon Aug 07, 2006 6:32 am
by DLT
This topic has been discussed alot, as your search revealed.

I believe the current winner is Billy, with a 140hp on an X. Mark Prouty, is bringing up second with a 115hp, also on an X. Yes, I'm jealous of both...

Bottom line, be smart: At the very least, regardless of boat, use significant backing plates, not just big washers... You might consider some fiberglass reinforcements as well...

Posted: Mon Aug 07, 2006 10:39 am
by Frank C
DLT's correct, this horse (engine size vs sailng performance) is a corpse.

I have a Suzuki DF60, with transom reinforced, at 360 lbs (wet). Some owners feel that the extra transom weight actually improves sailing performance. I'm sure that it has no negative impact on the boat's sailing balance (model yr 2000). Mark's Suxuki DF115 weighs only another 60 or so, and Billy's DF140 is actually a tad short of that.

Do the 26X or 26M sail so magnificently? ... IMO, if you combine a big motor with a cabin full of Waterbago accessories, you might lose a sail race vs another Mac26. Does that impair the basic sailing experience? ... not a whit~! ... does it improve the recreational value of the boat? ... Absolutely! :)



If you bought a Macgregor 26 ONLY for its sailing performance, you've already
made your first mistake. Don't amplify it with too small an outboard!
:wink:

Posted: Mon Aug 07, 2006 11:57 am
by RandyMoon
I have a Tohatsu 90 which weighs in at 320 lbs. I like it as it performs real well.

There are things to consider like altitude (some motors perform better than others at high altitudes) and most important, is there a dealer in your area who has parts and can readily make repairs. If you live on the coasts or Great Lakes, that might not be much of a problem but in rural areas could be.

Posted: Mon Aug 07, 2006 2:01 pm
by secross2
Well I am thankful for all the info and I perfer sailing over powering. So after reading everybody's posts I think I'm going to stick to the basics for the simple reason of I like sailing over powering. Luckley I am close to a dealer Blue Water Yatch if I do plan on making the change to my :macx:

Thank all.

Posted: Mon Aug 07, 2006 10:59 pm
by blanton
I have the 140 suzi and my M does not feel overpowered at all. I've replaced those two little plastic pieces that give the 140 that funny hump back on the engine cover with the corresponding pieces from a 90 or 115. With these plasic bits the 140 tilts further under my helm seat. As has been mentioned the 140 is lighter than either the the 90 or 115. In the 90, 115, and 140 the crankshaft is offset forward of the driveshaft moving the weight of the powerhead further forward over the transom. Suzuki claims the 140 has the best power to weight ratio of any four stroke. I do enjoy being able to cruise at decent speeds with heavy loads at lower throttle settings. I's a nice engine and works well with the M.

Posted: Wed Aug 09, 2006 8:58 pm
by secross2
Now I'm thinking again. Do you still sail? Does she feel right while sailing?

Posted: Wed Aug 09, 2006 9:51 pm
by blanton
I'm new to sailing a MAC so I've nothing to compare it to. The motor weighs about 100 lbs. more than a lot of 70's installed by dealers. The powerhead is right under the helm seat. Being an Alaska boat (and a Blanton boat ;^) this thing is going to end up being a 'systems' boat at the heavier end of the spectrum for Macs no doubt. Larger batteries, anchor windlass, more fuel, more survival, play gear, clothing, and on and on.