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ContinuousWave: Whaler Performance
jack plate for 13
|Author||Topic: jack plate for 13|
posted 01-15-2002 08:50 AM ET (US)
I am considering putting a jack plate on my 13 with new 40 -50 hp Merc or Yam. Any experience out there with appropriate amount of width of plate for the right amount of set backfor this boat and engine combination? A local custom builder makes them up to 12 12 inches.
posted 01-15-2002 03:07 PM ET (US)
12 inches is way too big and way too $$$. Go with a 5 or 6" setback. It is gonna add weight back there as well. Clark is the man on that area. I just put 1 on my 17 but that is a bigger boat. 13's tend to porpoise normally, be careful.
posted 01-15-2002 11:41 PM ET (US)
Yeah, go with a 5", I'd say. Get the lightest plate and the lightest engine of that H.P. range -have low(er) weight at least on your side in this particular application, for a better (and safer) ride.
My brother, going for speed, managed to get 45 m.p.h. out of a jacked up two cylinder Merc 40 on our old 13, back in the Seventies. The motor was a short
shaft (it was the old 'cut away' 15" transom), and it was manual start. The boat was also known to have a nice non-porpoising ride, as a result of the lower weight (my bro. also weighed only 140 lb.back then).
posted 01-16-2002 09:07 AM ET (US)
Clark, any comments or recommendations? Thanks
posted 01-16-2002 10:03 PM ET (US)
You might consider the CMC vertical extensions with no setback.
posted 01-17-2002 12:07 AM ET (US)
I have used 8 and 10 inch set-back brackets and prefer the 8"... but, I have always used 15" shaft length motors on the 20" transom and the 20" on 20" may perform differently... These are things that you have to try and fiddle with to get set-up right! Clark... Spruce Creek Navy
PS> Also I use a Doel-fin which I think holds the water to the prop and cooling intake. Watch that tell-tale cooling water stream and if it sputters or dribbles lower the engine!
posted 01-18-2002 09:14 AM ET (US)
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