Moderated Discussion Areas
ContinuousWave: Whaler Performance
54 mph in Nauset
|Author||Topic: 54 mph in Nauset|
posted 06-30-2003 01:34 PM ET (US)
Just passed the fifth hour on my new/leftover 1999, 90 hp Ficht mounted on my 1971 Nauset and as directed by the manual and dealer I opened the throttle to full for 30 second bursts. Hang onto your hat ! According to my new Raymarine depthfinder w/ speed indicator, I was soon travelling 54 mph @ 6000 rpm on Fishers Island Sound, CT. Talk about "rocking your world" !
I do not know how accurate the speedometer is, but I bet it is close. I will borrow a hand held gps and check it out. Anyone else out there get this kind of speed out of their 16' hull with a 90 hp ? Thanks.
posted 06-30-2003 01:45 PM ET (US)
At top speeds my Lowrance fish finder water speed indicator is frequently out of whack with my GPS. I suspect the turbulence can cause these to misbehave. My GPS will give me a top speed of 48 while the water speedo will read 59. They will usually be within 1-2 mph of each other up to 38-40 mph. My boat's a 17 Outrage II with a 135 Optimax.
posted 06-30-2003 02:42 PM ET (US)
Those are great engines but count on 45+mph.
posted 07-02-2003 05:25 PM ET (US)
That does sound quite fast for a 90hp. Is that engine rated to run at 6000 rpm? My 115 Ficht is 5750 top rpm. I get 44kts which is just at 50mph -- plenty fast enough.
posted 07-02-2003 05:26 PM ET (US)
The above speeds are on a Montauk.
posted 07-03-2003 10:36 PM ET (US)
My nauset with a 1999 Johnson 90 hits 44 on the gps, or about 49 on the Lowrance fishfinder. It's underpropped, and has the motor all the way down (bottom holes), and has a top, so might get a bit more, but the gps is the only way to know what is really happening.
posted 07-03-2003 10:45 PM ET (US)
I discovered that my FF speedo was also off. However you can go to the prop calculator in the reference section which, if you enter zero slip, should give you the theoretical max.
i think you want to check that WOT rpm. it may be high and if it is, you could risk engine damage. if it is too high, figure out the right prop and make the change.
i just bought a 2003 75hp FICHT - love that engine. i do think you want to make sure the recalls were done on teh 1999 though, especially if that was pre bombarier. there was a oil seal or fuel seal issue or something which could lead to powerhead failure - happened to a friend of mine. so if you have a bombardier warranty you are ok but if its an OMC one that you could have an issue.
you will love that engine though - loads of torque, great hole shot, quiet and smoke free. Love mine.
posted 07-09-2003 02:11 PM ET (US)
Thanks for the comments. I will check the RPM @ WOT and discuss the prop with the dealer if need be.
PS The boat also fishes well
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