140 susuki 4 stroke

critterg · #1 02-20-2005, 01:43 PM

I have a 1977 20 cc. The old 1977 140 evinrude is shot. I am thinking of building the transom to 25" and putting the 4 stroke Susuki on the back, but I am afraid that it will not have anough power. Could someone that has one powered this way please help.
Thanks,
Critt

GC · #2 02-21-2005, 07:18 PM

I did the exact thing your planing on my '72 cc. Turning a 14x21 aluminum I top out at 42 mph on the gps. Probably could do a little better with a ss but I'm satisfied.

Mark · #3 02-21-2005, 09:58 PM

I have the DF140 on a '71. Trayder has the same engine on a '69. The list of 20's on this site with that engine is a long one!! I have the 14x20 SS prop on there and am happy with it. I generally cruise at about 4100 rpm which gets me right at 28mph. the top end is right at 40mph with a full 75 gallon tank, t-top, and two full size adults on there (with full cooler of course [img]/images/graemlins/grin.gif[/img]).

ocuyler · #4 02-22-2005, 07:54 PM

Is a Suzuki 250 to a 23 what a Suzuki 140 is to a 20' weight and power wise? Or is the 250 heavier in relation?

Mark · #5 02-22-2005, 08:10 PM

a 140 weighs 25.6% of the weight of the SC20 hull
a 250 weighs 22.3% of the weight of the SC23 hull

yes, I'm lacking for things to do right now [img]/images/graemlins/frown.gif[/img]

Capt Chuck · #6 02-22-2005, 08:26 PM

Quote:

yes, I'm lacking for things to do right now

Thats what she says!!!

ocuyler · #7 02-22-2005, 10:01 PM

Mark,

Thanks for that calculation. After all the discussion about how a "heavy" motor like a Suzuki 250 will be "too much" on the transom of 23, this statistic makes is seem relative.

Chuck,

Excuse me, but, who in your house is lacking for things to do?