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ContinuousWave: Whaler Performance
Re-Power Montauk with Recent Johnson 90-HP
|Author||Topic: Re-Power Montauk with Recent Johnson 90-HP|
posted 04-06-2004 08:57 PM ET (US)
[This author has a 1989 Montauk 17 and solicits performance data when the boat is powered by a 90-HP Johnson 2-stroke of the 2003 or 2004 model year.]
posted 04-07-2004 12:40 AM ET (US)
The 90-HP Johsnon 2002 motor is the same as the 2003 models.
posted 04-07-2004 11:10 AM ET (US)
Newer 17's will run about 43-44 with a new 90 if set up correctly. Older hulls ("16's") will do about one MPH faster or so.
posted 04-07-2004 11:23 AM ET (US)
My set up is a 1986 Montauk with a 2003 Johnson 90 2 stroke. Love it. [The 2003 model Johnson is] much quieter than the 1986 Evinrude. Nick is correct about the performance: 45-MPH with the 14 x 17 pitch aluminum prop from OMC, and a ROCKET out of the hole. Ask Tom Clark, I let him test drive it at the Blake Island Rendezvous. Those figures are at 5700 rpm (200 over redline) with mounting one hole up. I'm trying a stainless viper 19-pitch this season and jacking it up another hole for grins. Gotta go get that dern bottom paint over in Bremerton today.... dock float coming back this week, must get boat in water... need Dungeness crabs.
posted 04-07-2004 12:32 PM ET (US)
Everything I've ever read about the V4 60-degree 90-HP Johnson motor suggests they perform more like a 100 HP motor than a 90. Due to the large displacement, they should.
posted 04-07-2004 03:42 PM ET (US)
Thanks for replies.
posted 04-08-2004 09:02 PM ET (US)
1977 Montauk with the Bombardier 60 degree 90-HP, the same as 2003- and 2004-model year engines. Tie yourself down out of the hole. I go 44-MPH WOT with just me at 5500 RPM using a 14x17 aluminum propeller. Had a 14x19 and went over 46-MPH alone, but with a full load it would only go 4500 RPM so changed to the 17-inch aluminum. Aluminum or stainless, 17-inch-pitch is the way to go.
posted 04-09-2004 09:22 AM ET (US)
[Edited article to improve readability.]
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