Moderated Discussion Areas
ContinuousWave: Whaler Performance
|Author||Topic: Max Horsepower|
posted 10-14-2002 03:56 PM ET (US)
Does anyone know where I can find the min/max horsepower rating for a 1967 and 1970 16 footer?
posted 10-14-2002 04:10 PM ET (US)
It is 100hp, same then as it is now.
posted 10-14-2002 04:21 PM ET (US)
min is 40hp.
posted 10-14-2002 04:21 PM ET (US)
posted 10-14-2002 05:05 PM ET (US)
So a 115hp wouldn't exactly be pushing it...?
posted 10-14-2002 05:41 PM ET (US)
It might be pushing it more than you think *if* the original 100 hp rating was established when horsepower was rated at the powerhead, and the 115 HP motor you are contemplating is rated at the prop. I don't remember exactly when the standards changed, but I believe it was worth about 10% difference which could roughly translate into installing a 125hp to 130hp engine on a boat rated for 100 hp.
|Tom W Clark||
posted 10-15-2002 11:13 AM ET (US)
The power ratings of outboards changed from power head to prop shaft in the mid 1980's so it's true that a modern 100 hp motor is more powerful than a powerhead rated motor.
But the fact remains that the 16/17 Whaler hull still has a 100 hp maximum capacity, regardless of how the motor is rated. That never changed.
A 115 is a very common power option for the 16 footer. It will be a lot of power but you do not have to use it all.
A 115 and a 90 are typically the same weight so there is not much of an issue there.
Minimum recommended horsepower to plane satisfactorily is 35 hp.
posted 10-15-2002 11:33 AM ET (US)
A 70's 100hp is about the same as a 85hp OMC or a 90hp Yamaha in my opinion. When we bought our Suzuki 140 back in 1981, 15% was the loss on hp so that zuki was more like a 160hp. And a 140 other was more like a 115 Zuki. I had a 17 with a 115 and it was not all that faster than most 90's but enjoyed fuel to the max.
posted 10-15-2002 12:45 PM ET (US)
Thanks for all the info guys, definately brought up some issues I had not considered...does anyone here have an opinion on the Honda Saltwater Series 4 strokes?
posted 10-15-2002 01:36 PM ET (US)
Sure! They are silverish gold.
posted 10-15-2002 01:37 PM ET (US)
Kidding....what Hp? If 115 then absolutely not. That engine weighs 500lbs.....no dice on a 16/17.
posted 10-17-2002 05:01 PM ET (US)
Thanks for the info on the Honda. You brought up a very important point about the weight. Is there somewhere I can obtain a spec sheet for my 1967 16 footer? I would love to know the weight restrictions and possibly get some more history about the boat in general. When I bought the boat, the original console had been replaced and I'm looking to return it to it's original form, but some sort of blueprint etc would be helpful.
posted 10-17-2002 05:18 PM ET (US)
Be sure to check out the 16/17 Reference section. I ran a 1973 Merc in-line 6 150HP (powerhead rated) for 12 years on a 16' Nauset. Would turn about 56mph, but the boat easily handled it's 275lb weight. The boat gets a little squirrely above 50mph. After I wore that engine out, I put on a 305 lb 1985 Merc 115 in-line 6, and the boat handled that also. It was not quite as fast as the 150.
This engine is now on my 18 Outrage.
posted 10-17-2002 05:21 PM ET (US)
BW has published a 400lb limit for transom load on the classic "17", which is about the weight of some of the 90-100hp 4 strokes.
Bigshot and I both have 336lb SuziRude DF70s on our Montauks. I like mine just fine, thank you.
I don't think I would want more than 350lb on a "16", and really liked the way my Sakonnet handled and performed with a 250lb JohnnyRude 70 2 stroke.
Red sky at night. . .
posted 10-27-2002 07:33 AM ET (US)
I agree with Bigshot. I just repowered with 70HP 4 stroke Evinzuki on my 1979 Newport, well drains are now just under water with no one in the boat. I can't imagine any more weight back there. The 70HP is perfect for this boat. My old 1979 90hp Merc I had was really about 75hp with the difference in how they figured HP back then. Narrow your choices by staying under 100hp, 90hp 2 stroke of 70/75 4 stroke. More than enough power.
Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.