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heres the deal:

I have a new to me but 1994 Montauk 17 that needs a new motor. Options are to buy a new one, or buy a used one. It urrently has a 70 hp johnson. I know i can get either a 50 or 60 hp enigine cheaper, is this enough power? i would like to get the boat above 25 mph....

thanks

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I personally wouldn't put anything less than a 70 hp on the back of a Classic Montauk...

Check out this reference guide located on our site:
http://www.whalercentral.com/readarti...ticle_id=5

I owned a 1978 Montauk for 15 years along with the 1985 Evinrude 70 hp.... She would do right about 30 mph tops.... I always wanted a little more speed at times but it wasn't worth spending the money to get a 90 hp...

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I have a 1987 Montauk and put a 90 hp Yamaha 4 stroke on last year. I can get about 34 mph here in Colorado. Elevation is about 5200 feet msl.

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broken record time, but here goes.............................. You can still buy the 90 Mercury classic 2 stroke for about $5400-5500 at any Bass pro shop or Mercury dealer. That motor is perfect for the Montauk, unless your looking for the latest high tech offerings out there and want a DFI. I have seen top end speeds of over 45 mph with this motor when setup with a jackplate and the right prop on the 17 hull. I have one on a 15 and don't consider it overly smokey,noisy at idle or fuel thirsty like many claim of the old carbed 2 strokes. I agree though, 90 would be the minimum I would want on the 17 hull.

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Thanks for the advice guys, 90 hp it is:p

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Smart move. I've just intalled a new 2007 Honda BF90D Four Stroke on my 1989 Classic Whaler Montauk and love it. See my Personal Page for more details & pictures. I've also had several discussions under Engines. Good Luck w/the decision, it's a difficult one, but a very rewarding one.

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i am about to repower my 78 montauk and was wondering if 4stroke gives a weight problem. about a 100lb difference in the 90hp. i was told it would cause it to porpoise. i plan on putting batteries up under the console and keep a cooler full of beer in front of the console and maybe a couple ladies on the bow. should this take care of the weight distribution?

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Post pictures of the ladies in bikinis so we can judge thier ballast abilities :D

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Skinny,

The heaviest motor on the list is the Mercury Optimax 75/90/115 hp 2 stroke at 375 lbs....
http://www.whalercentral.com/readarti...ticle_id=5

The next heaviest is the Honda 90 hp 4 stroke at 373 lbs...
We have a few members here with this motor on the back of their Classic Montauk.
http://www.whalercentral.com/infusion...er_id=4006

On a Montauk, it is much better to have the battery in the console as floor space is at a premium.

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We have a 87 Montauk with a 2004 Honda 90 4 stroke--it's fuel efficent-quiet and most important RELIABLE as my wife goes out by herself all the time

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My 2 cents,

I have BW Super Sport, same hull as a Montauk. I run a 90 HP Yamaha 2 stroke. I can squeeze about 42-43 MPH out of this rig. The post several above with a new 90 merc is a great price!! The Merc 90 2 stroke is supposedly capable of putting out about 98HP from what I read, not sure if it is true. It is a tad heavier than the Yamie. Pound for pound the Yamaha wins at 269 LBS at 90HP, merc also very close second at 303.

Below is info from another site outlining outboard performance on a Montauk with different engines. I assume for a pre 2002, Very Interesting results

Fuel=168 LBS
Boat=950 LBS
Gear & Passengers=400LBS

HP/CYCLE WT TOTAL/WT MPH
---------------------------------------------
Honda 50 4 212 1730 34
Honda 90 4 373 1891 44
Yamaha 50 4 233 1751 34
Yamaha 60 4 244 1762 37
Yamaha 100 4 356 1874 46
Yamaha 50 2 194 1712 34
Yamaha 60 2 228 1746 37
Yamaha 70 2 228 1746 40
Yamaha 90 2 261 1779 45 ****
Merc 50 4 236 1754 34
Merc 60 4 236 1754 37
Merc 90 4 386 1904 43
Merc 50 2 199 1717 34
Merc 60 2 219 1737 37
Merc 75 2 303 1821 41
Merc 90 2 303 1821 44 ****
Suzuki 50 4 243 1761 34
Suzuki 70 4 359 1877 39

BTW the Bikini idea is a very good one as long as they are in BW's... I'll start shooting this weekend B)B)

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jon,

Just a couple of notes here:

1. I don't see the E-Tec listed in the chart above....

2. ****The Yamaha 2 strokes cannot be sold new in California so the list of Yamaha's is useless to some of us.... Even if we could buy them new, most of the waterways will not allow them in the water so they would still be useless...

3. ****The Merc 90 is referring to an older engine and one that again cannot be used in California or many of the waterways... The Mercury 90 Optimax weighs over the 303 lbs. listed in the chart. It weighs 375 lbs... The old Merc's are useless to most of us here in California due to EPA on the waterways....

E-Tec 90 hp, 2 stroke, 320 lbs., 1838 lbs. total engine + boat weight, ?? MPH

So, the chart might be good for people that don't live in states that don't have EPA regulations like California but the chart is also outdated as far as the new engine weights are concerned. And of course, the E-Tec is not listed....

Maybe a few of the members here with the E-Tec 90 on the back of their Whaler can give us the MPH....

I am not knocking any engine brands, but for California and some other states, that would leave out the 2 stroke Yamaha's and the majority of the 2 Stroke Merc's...

If I lived in a different state, then the Yamaha 90 would look good to me too....

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Hi Joe,

Your are absolutely correct, the listing did not mention eTec as well a few others, (Note that I did lift this from another site, sorry Evenrude not being included) Etec is also a great chioce and environmentally friendly and fairly light weight and fuel efficient from what I recall. It does cost a bit more money. Note that Nissan/Tohatsu also build DFI's which are fairly light.

Also note that Mercury does quietly make basic oil injected 2 stroke (not a DFI optimax). There was an article in last Aprils trailer boat magazine which mentions this. They must be for the less stringent environmental states.

If I were to evaluate purchasing a brand new outboard today my I would seriously consider the DFI.s etec included.

Bring on the Bikinis..

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A point of clarification on the Honda. The 2007 Honda BF90D actually weighs in at 359 lbs (only 39 lbs more than the E-Tec), has fuel injection & VTEC and is even more fuel efficient than its predecessor w/carbs, has a full-throttle range of 5300-6300 rpm, and w/its new Boosted Low Speed Torque (BLAST) feature it will flat put you down in your seat while getting up on a plane faster. I don't think I had it trimmed properly the other day (something I'm trying to learn & then master) but w/my wife and I and about 20 gallons of fuel we were cruising at 5800 rpms & 40 mph (gps-SOG). Had 5 people on board last night & my friend drove her & just couldn't get over her strength & speed. I fully agree w/Joe about moving the batteries into the console, but remember to convert to gel-cell so as not to subject your electronics to lead acid fumes. You can see my configuration in my personal page here.

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Chris,

I can't find the weight of the Honda 90D on their website.
Are they hiding it?
They still list the 90 at 373 pounds....

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Joe - when you go to the Honda website click on the ad for the new 70/90 where it says more info> it will take you to a brochure for the 2007 BF90D w/all the new specs. Here's a link -
http://www.honda-marine.com/new_model.html

I'm taking her in today for the 20 hour & to have a new VHF & Stereo installed. Currently have about 1/4 tank left & will fill up & give ya'll the stats on MPH, etc., but generally speaking I put 25 1/2 gal in my 28 gal tempo & ran it for about 16+ hours and still have this much left. Sure couldn't have done that w/my old yammi 90! That was with normally 2, a number of times 3, and several occasions of 4 people on board, goosin & jammin it all over the place, and generally having fun. Again, more specifics to follow.

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90 2 stroke yamaha is what im doing. ITs in mass. so im all set.


thanks guys