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  repowering a 17' montauk

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Author Topic:   repowering a 17' montauk
whaler02 posted 01-14-2002 11:32 AM ET (US)   Profile for whaler02   Send Email to whaler02  
I have a 1988 17' montauk with a 88hp johnson. I am getting ready to repower, and was looking at the 90hp Honda. I know this motor weight more. I was wondering if anyone knew if the weight would be a problem?
Bigshot posted 01-14-2002 11:43 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Many discussions on this....do a search. Would I put almost 400lbs on my montauk...No!
TightPenny posted 01-14-2002 02:25 PM ET (US)     Profile for TightPenny  Send Email to TightPenny     
For my two cents, I would stay with the Johnson. You probably can use all of your controls and cables.

The extra cost to go four cycle, plus the extra hundred pounds, seems unnecessary, plus it will take a long time to save enough fuel to make a difference.

I have a 2001 Johnson on my Montauk, and am well satisfied.

Bigshot posted 01-14-2002 03:16 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Problem is he would need all new wiring harness, keyswitch, systems check tach or guage. He would only be able to save the controls, prop and cables(and tach if buying other guage) being his old engine is a 1988. The new engines have the full warning systems after 1994 I believe. Honda comes with everything but a prop(at least the 90 I looked at did).
Bigshot posted 01-14-2002 03:17 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
PS place in Canada has 2001 90 Hondas for under $5k plus $300 shipping. Do a search under "Honda outboards".
Taylor posted 01-14-2002 03:32 PM ET (US)     Profile for Taylor  Send Email to Taylor     
The thinking in the ealier threads is that you get into porpoising problems as you start to get above 300#. This is aggrevated if the trim range is limited. I've not had a problem personally with my 1988 100HP Merc, which is about 340#.

After reading the earier discussions I did some what if browsing, and I would look at the 3 cylinder 90HP merc, (303#) or the 90 Yammaha (261#). Generally I notice that there is a weight jump in the move from 3 to 4 cylinders, and I'd like to stay with 3, but the V4 johnson 90 at 319# looks good too. I'd not reallized it was that light.

Of course the 115 is the same weight... but then you would be offically overpowered. 90hp seems to be the most popular power for a Montauk.

kamml posted 01-15-2002 06:56 PM ET (US)     Profile for kamml  Send Email to kamml     
I just went through this exercise myself. I took the internet route for prices and found a couple of really good "sounding " prices. But... after cables, ignition, shifter etc. plus install and freight were put into the equation it was just as cheap to buy locally. I was, as you are, considering an entirely new installation, not a like for like replacement. I expect like for like replacement would be cheaper period. When checking around I had heard that the Merc was (quite) a bit quicker than the Yamaha. I was surprised until I read the spec sheet. The Merc is a little heavier, but has more cubic inches. With some exception, it hard to beat cubes. To make this a little shorter I went with a Merc 90 from a local dealer. Heard a story about lease back motors that have been reconditioned. This fellow bought one and found out later through a maintenance computer repair search that this motor was on its second complete powerhead in two years. Use caution on internet purchases. Ken
Clark Roberts posted 01-15-2002 07:36 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
I have a friend, Mark King, who just installed a 2002 Merc 60hp 4 stroker EFI on a '90's Montauk and is in the process of breaking it in... Maybe he will report the results.. He has indicated to me that it is super quiet and has lots of power... What about it Mark!? Clark... Spruce Creek Navy
misterca posted 01-16-2002 07:50 AM ET (US)     Profile for misterca  Send Email to misterca     
Yea, What about it Mark?!

Thanks Clark.

Bigshot posted 01-16-2002 09:52 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I just did a 70hp Evinzuki at 342lbs on a 6" jackplate and NO porpoising and no doelfin, etc.
jameso posted 01-16-2002 10:56 AM ET (US)     Profile for jameso  Send Email to jameso     
The 60 4 stroker intrests me any one know the weight?
Jim Armstrong
Taylor posted 01-16-2002 01:00 PM ET (US)     Profile for Taylor  Send Email to Taylor     
According to the Mecury website... Weight-Dry: 236 lbs for the 4s 60hp.
TightPenny posted 01-16-2002 03:02 PM ET (US)     Profile for TightPenny  Send Email to TightPenny     
Gotta disagree with you Bigshot.

I used the controls, cables, and wiring from a 1974 Evinrude on a 1997 Johnson. I added the new Engine to my 1977 Sport 15.

To adapt the new engine to the old wiring, OMC had a short length of wiring harness which allowed the attachment of the old red round plug into the new engine.

The only down side was that the warnings were translated into horn beeps instead of the red lights that the new controls have.

The under $50.00 cost was a lot less than a new control column and wiring harness.

Volition posted 01-26-2002 01:27 PM ET (US)     Profile for Volition  Send Email to Volition     
I've got a 17' Marlin, a Mountauk clone built by Bob Doughtery when he left Whaler, with a 90 Honda. I got a sweet deal on the rig, but would not buy a Honda, it's smooth and quiet, but heavy. I recently read of a Japaneese company, perhaps Suzuki, that's got a new 90hp, 3 cylinder, 2 cycle motor that meets the 2005 environmental rules. I think light weight counts for a lot.
BlindHog posted 01-30-2002 09:49 PM ET (US)     Profile for BlindHog    
I've got a 17 with a 90 Evinrude, which was an upgrade from a 20 year old 70hp. The 90 has increased my top end from 30 to 45 and my fuel has gone down quite a bit. If I had to re-power today, I would definitly go with a four stroke. I'm just tired of the all the blue smoke before it warms up. I've ridden in a boat with the 100hp Honda four stroke and it was very, very quiet. I've also heard from a dealer that the Mercury 90 four stroke is actually a re-branded Honda 100 Four.
tabasco posted 01-30-2002 10:12 PM ET (US)     Profile for tabasco  Send Email to tabasco     
Hey BigShot did you have to go to hydraulic steering after installing the Jackplate? If not ....how does it handle. Heard it almost a must if you install a Jackplate.
whalerron posted 01-31-2002 09:21 AM ET (US)     Profile for whalerron  Send Email to whalerron     
Motors from Canada? I have a friend who bought one this way and a few months later, the Federal Government came knocking on his door. They made him pay an import tax on the engine. After that was done, the engine wound up being just as expensive as if he'd bought it in the US.

Apparently, US Customs was going through the shipper's bill of ladens and they found the one for this motor.

Bigshot posted 01-31-2002 10:20 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Hydraulic steering...nope!

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