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Author Topic:   300hp on Montauk
jeffwedge posted 08-12-2003 11:50 PM ET (US)   Profile for jeffwedge   Send Email to jeffwedge  
I just did some calculations and came to the conclusion that a 17 Montauk would do 80mph with a 300hp mercury racing outboard. I know that thats alot of engine weight for a little montauk. But its really only 130lbs more than a 100 evinrude. Supposing you could reenforce the transon with say kevlar, you would have one hell of a fast fishing boat. Sure fuel economy and range are diminished, but hey 300hp on a montauk.

Any comments

acseatsri posted 08-13-2003 12:59 AM ET (US)     Profile for acseatsri  Send Email to acseatsri     
"Any comments "

Ever heard of chine walk?

Sal DiMercurio posted 08-13-2003 01:04 AM ET (US)     Profile for Sal DiMercurio  Send Email to Sal DiMercurio     
Well, the Montauk hull isn't the fastest of the bunch, but I do think it would haul booty pretty good, as it would no longer be a planing hull,because it would be flying with maybe 1" of hull touching the water if that.
It would be one hell of a scary ride if you could keep her from chine walking or blowing over backwards.
I'v had "MANY" people grab my arm & shake their heads ...."NO" ..on my "V" 20 with 50 hp over max rating running 60+ mph.
I'v run some real fast boats at just "under" 200 mph.,[ 196.56 all time best ] but I think a Montuak with 300 ponies would be pretty tough to handle.
BQUICK posted 08-13-2003 11:12 AM ET (US)     Profile for BQUICK  Send Email to BQUICK     
I think it would a chinewalker big time as you would be way above the hull speed but if you trim way out the hull will be less of a factor. Still it would be too wild IMO, this is NOT a performance hull.

The advantage I see would be the ability to have 6 people and gear in it and haul butt.


captbone posted 08-13-2003 11:58 AM ET (US)     Profile for captbone  Send Email to captbone     
I think a light v6 carb 150-175 would give you the best performance. I can't see a 300hp giving a speed that much higher than a 175hp such a the 375lb v6 60 degree johnson with a jack plate and a good set up.
brisboats posted 08-13-2003 12:32 PM ET (US)     Profile for brisboats  Send Email to brisboats     
Wow!, with those ponies I would be experimenting with some sort of pad for the bottom. The montauk hull starts chine walking somewhere well below that 80mph. To have the prop blow out and the hull come over would be a death wish.

There was a lot of discussion on another forum about a guy who had a mercury racing motor on what I think was a 16 foot Bayliner. The fellow advertised the boat on Ebay as a 80mph plus boat and he got blasted by the gurus who know how to make a boat go fast. The end conclusion is to run with the big dogs in the 80 mph plus range, it really takes the correct hull design and an experienced operater. There is , however on the same forum a guy that has added a pad to the bottom of his Bayliner and with modest horsepower (150-175) has run in the area of 70mph.

The fastest Montauk I have heard of is a poster here with a inline 6 mercury getting in the low 60's. Are you looking at a promax 300? I think the weight on that motor is up there. This topic intrigues me as I am assembling my "sleeper montauk" .


Perry posted 08-13-2003 01:34 PM ET (US)     Profile for Perry  Send Email to Perry     
Why waste a good hull with that kind of power? The Montauk was not designed for that much power. If you want to go fast and live to tell about it, put that 300 hp racing Mercury on a boat that was designed to go fast.
jeffwedge posted 08-13-2003 01:47 PM ET (US)     Profile for jeffwedge  Send Email to jeffwedge     
Because I can!
lhg posted 08-13-2003 05:44 PM ET (US)     Profile for lhg    
I have a photo taken last summer in Roche Harbor, San Juan Islands WA, of a white classic Montauk with a Mercury/Mariner engine on it and 100HP oficial Mariner decals. On looking at the engine closely, I recognized it to be a V-6, not the in-line 4 of the 100HP.

Asked the guy about it, and he came clean. A 410# Mercury/Mariner 150 EFI, and he changed the decals because he was getting to much grief about "all that HP".

Said it would do 60.

newbee posted 08-13-2003 09:27 PM ET (US)     Profile for newbee  Send Email to newbee     
my teeth rattle with my 90 yam even though i love it. 300 hp?? only one question. where will you put the fuel you will need? other than than that i bet it would surely be a thrill, even if it did kill ya.
hooter posted 08-14-2003 10:41 AM ET (US)     Profile for hooter    
jeffwedgie, you CAN jump off the Empire State Building without a parashoot just to experience an un-powered speed of about 180mph,

for a few seconds.

If you is lookin' for a Darwin Award, yo' momma can put it on her mantle piece t'remember you by:-!

Bigshot posted 08-14-2003 11:54 AM ET (US)     Profile for Bigshot  Send Email to Bigshot

If ya really could do it....which I doubt you can, why not use the lighter & faster 280hp 2.5 EFI? Actually if you knew anything about racing you would probably opt for the smaller racing engines knowing that HP is not the key factor.

BillB posted 08-14-2003 12:15 PM ET (US)     Profile for BillB  Send Email to BillB     
I just worked up a calculation too....

17 Montauk + 300 hp Merc = ORGAN DONOR


BQUICK posted 08-14-2003 02:45 PM ET (US)     Profile for BQUICK  Send Email to BQUICK     
I like a 150 Merc inline 6 on a Montauk with 90 hp covers.....hehe......58+ mph


AQUANUT posted 08-16-2003 03:45 PM ET (US)     Profile for AQUANUT  Send Email to AQUANUT     
hmmmmmmmmm! montauk + 300hp = haulin butt hmmmmmm! you + 8 inch projectile strapped to butt = haulin butt.....both have same result....i.e. kiss butt goodbye!!!!!!!!!!!!......good luck your gonna need it!!!!!!!!!!!!!!
Drisney posted 08-16-2003 08:13 PM ET (US)     Profile for Drisney  Send Email to Drisney     
I do love the job security people give me.
Fire and Rescue
flawton posted 08-17-2003 01:33 AM ET (US)     Profile for flawton  Send Email to flawton     
when will the madness end

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