Re: 90 HP 4 cycle performance
 

Thanks Fr.Frank. IF I can get close the your cruise Rpm/ speeds I will be a Happy camper

Re: 90 HP 4 cycle performance
 

suzuki just came out with the 80,90,100 hp 4 stroke that weighs only 341 lbs. 6500 bucks if you look around.

Re: 90 HP 4 cycle performance
 

Actually, the new Suzuki four stroke 70, 80, and 90 hp motors are 341-347 lbs. The 100, 115, and 140 hp models are 427-440 lbs.

The Suzuki DF90 tested at 92 hp by Trailer Boating, contrasted with my 375 lb Mercury Optimax 90 2-stroke testing at 106 hp here locally, and the BRP Etec 90 2-stroke testing at 105 hp according to results published on Scream-n-Fly.

• The Yamaha F90 4-stroke weighs 369 lbs.
• The Yamaha 90 hp 2-stroke weighs a measly 269 lbs.
• The Yamaha 115 2-stroke weighs 358 lbs. I don't have actual power output figures on the Yamahas.
• The Honda 4S 90 EFI weighs in at 365 lbs.
• The Honda 115 weighs 505 lbs.
• The Chinese-made Parsun 100 hp 2-stroke inline 4 weighs 298 lbs.
• Ruggerini Diesel outboards of Italy has a 130 hp diesel outboard in testing. It's a 4 cylinder 4-stroke common-rail diesel. Test models weigh 480 lbs.
• The Tohatsu MD90 DFI 3 cylinder 2-stroke, weighs just 315 lbs and tested out at 77.4 kW propshaft power output (105.2 hp) in a test in Australia.
• The Tohatsu 115 DFI 4 cylinder weighs 392 lbs and tested out at 91.7 kW (124.7 hp)

Amazing what just an hour of research will turn up.

Re: 90 HP 4 cycle performance
 

Just for some more information for you to base your decision....

I have a 79 18 with a 1994 Mercury 115 HP inline 4 cylinder. I cruise at 22-23 knots and WFO 5100 rpm the boat tops out at 28.5 knots. This is by myself with 3/4 full tank and no tabs.

Re: 90 HP 4 cycle performance
 

The simple answer is no they are not adaquate, you can quote weight all you want but there's no replacement for HP - read the thread about the 23 with 225 Etec - will it plane with a 150 maybe but won't ride worth crap - its not a tugboat.

Re: 90 HP 4 cycle performance
 

i had a 1998 90 honda on my 20sf came on the boat
when i bought it i was not happy w/it at first
after some different props and raising the moter up where it belonged it ran along perty good top end just me on the boat i would see 34 on the gps cruise along at 25
but started having some problems from the ethonal
and repowered last july went w/zuk 140 got 130hrs on it
and i love it but to your? the 90 will push it along ok
my 90 weighed over 400lbs and the new one are less
i guess its all in what you want i would look at the 140
iam very happy and the price is nt bad either

Re: 90 HP 4 cycle performance
 

http://www.bwbmag.com/output.cfm?id=943183

A little old, but here's a 90hp shootout from Bass and Walleye. Also the old Suzuki 90 is the same block as the 115 and 140. 90/115 are the exact same displacement (and the 115 is a strong 115). 140 has a slightly larger bore than the 90/115.