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ContinuousWave: Whaler Performance
Re-Powering > 16'7" Boston Whaler
|Author||Topic: Re-Powering > 16'7" Boston Whaler|
posted 01-25-2003 12:31 AM ET (US)
Highs and Lows of the Mercury 90hp 4stroke vs. Mercury 90hp 2 stroke. I was shying towards the 4 stroke, but would appreicate any Info.Thanyou.
posted 01-25-2003 08:17 AM ET (US)
We did not like the 90 2S that was on son's Montauk.
It was noisy, chronically rough at idle and would not troll for more than a few minutes without loading up.
Off idle it performed well and reliably.
I am completely sold on 4 strokes, but would hesitate to buy a carbed engine in a size range that had EFI engines available.
You might be surprized at the performance available in 60 and 70HP EFI 4 strokes. Merc has an EFI 60, and I am very happy with the Suzi DF70 on my Montauk.
Red sky at night. . .
posted 01-25-2003 10:04 AM ET (US)
Consider the 90 HP Johnson V4 2S. More displacement(torque) than the Merc, idles well, priced right. Best bang for the buck.
I think 90 HP 4 strokes are too heavy for the 16 foot hulls. Just an opinion.
posted 01-25-2003 10:55 AM ET (US)
I am sold 100% on 4s. Quiet, no smoke, perfect idle, great gas mileage. Mine is carbed (not EFI) and I've used it year round for the last few years and so far zero complaints, though I would certainly not discourage EFI.
I know the hull is rated for 400# motor, but with our 200# motor plus our 22gal livewell full in the back, the boat is noticeably back heavy and rides a bit rougher in the chop. If the 2s vs 4s weight difference is significant then maybe this is something to consider. I don't know what the difference is in weight for that size motor.
posted 01-25-2003 06:04 PM ET (US)
My buddy has a 90hp Merc 4 stroke on his boat. It looks HUGE! It starts right up and is quiet at idle but once going it is about as loud as other motors. He is on his third prop because the hole shot is awful. It also makes clanking noises when put in and out of gear. Not impressed. Get a Johnson 70 4 stroke or any 2 stroke 90 before this one.
posted 01-25-2003 07:08 PM ET (US)
JohnnyEvinZuki DF70 seems to be highly regarded if you want a 4s (Still heavy in IMHO). However I saw on another site a discussion of oil pump/camshaft failures. Any comments?
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posted 01-25-2003 10:14 PM ET (US)
Couldn't be happier with my 90 merc 2stroke. Idles smooth enough for me, runs quiet and in the low 40's gps. Do a search and you'll find a thread from last spring that deals with my decision to repower with a merc along with some performance data.
posted 01-26-2003 02:10 AM ET (US)
Looks like as far as the posts go it may be a toss up of 2s vs 4s? Both having different positives and negetive factors to digest.I will look into the weight diff. as I didnt even consider that point.Thanks for the Replys and I will look at the Evin/Johnson too.
posted 01-26-2003 09:59 PM ET (US)
2001 70 HP Suzuki new...
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posted 01-27-2003 12:55 PM ET (US)
I'm with Landlocked. No problems with my Merc 90 2s, but then again, I have not spent much time on any boat with a four stroke.
I don't troll much, but I do go through tons of no-wake zones, and have never had a problem with fouling. Maybe it's the spark plugs. I run the factory recommended NGK's.
posted 01-27-2003 07:17 PM ET (US)
My 2002 90 Merc 2s is a great motor. It is loud at throttle, but reasonable on gas, no hassle oil injection, light weight and very quick to plane and on top end in the 40s. No problems with idle or trolling speeds either. Ken
posted 01-28-2003 01:39 AM ET (US)
No recent purchases on 4 stroke ? Sounds like everyone loves the 2s! I still have top find the weight diffs.
posted 01-28-2003 12:16 PM ET (US)
I have a 2002 Honda 90 on my Dauntless 16. It runs smooth at all throttle positions, it is very quiet, get's excellent fuel economy but a little low on torque. With the right prop it has a decent hole shot and top speed of around 40 mph.
posted 02-05-2003 11:48 PM ET (US)
Looking at the mid range hp specs from the different manufacturers it looks like the suzuki 4 stroke/johnson 4 stroke 70 hp would be the best fit for the 17 montauk.
I would shy away from honda 70/90 because of the weight.
In california, not all lakes let you use a 2 stroke motor.
*I will have the same problem some day either repower or should I just buy me another boat (new 170 montauk)?
Ken (17 montauk)
posted 02-06-2003 01:40 PM ET (US)
Until the Yamaha/Mercury 90 4-stroke gets the EFI system, I would not get one, either color. If you want a Mercury 4-stroke, get the far superior 115 EFI, at same weight. The boat WILL handle it.
The 90 2-stroke is a great engine, one of Mercury's highest sellers. The idle problems mentioned by JB, above, sound like the result of improper carb adjustment service.
The integral oil injection tank alone makes it preferable over a Johnson. 16' Whalers don't have a lot of space for a separate oil tank installation.
posted 02-06-2003 08:16 PM ET (US)
seasicknes, in all of California, there are
about four lakes that don't allow two-strokes.
Three of them I've never heard of. The fourth
is Tahoe, which doesn't allow carbureted and
TBI two-strokes. They do allow direct
injection two-strokes. (Acutally, they allow
and disallow based emisions, but the net
effect is as described above).
I've got a 90HP Evinrude two-stroke. If I
posted 07-20-2003 08:45 AM ET (US)
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posted 07-20-2003 10:22 AM ET (US)
I would take a very serious look at the Evinrude FICHT DFI motors. They are fast out of the hole, very quiet. Mine is about 30-40% more fuel efficient than the comparable carbed 2 stroke I had before. I also uses about the same amount less oil (and the 2 stroke was great on both).
since bombardier bought OMC's assets and fixed the problems the reliability issues are gone.
i haven't seen the new e-tec motors from Evinrude, but they are coming out now. I would give these a serious look they are supposed to be lighter (good weight to power ration).
Failing that, i would do a yamaha.
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