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  Re-Power Montauk with Recent Johnson 90-HP

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Author Topic:   Re-Power Montauk with Recent Johnson 90-HP
denns posted 04-06-2004 08:57 PM ET (US)   Profile for denns   Send Email to denns  
[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.]
whalerron posted 04-07-2004 12:40 AM ET (US)     Profile for whalerron  Send Email to whalerron     
The 90-HP Johsnon 2002 motor is the same as the 2003 models.
Bigshot posted 04-07-2004 11:10 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
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.
raygun posted 04-07-2004 11:23 AM ET (US)     Profile for raygun  Send Email to raygun     
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.
Peter posted 04-07-2004 12:32 PM ET (US)     Profile for Peter  Send Email to Peter     
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.
denns posted 04-07-2004 03:42 PM ET (US)     Profile for denns  Send Email to denns     
Thanks for replies.
masbama posted 04-08-2004 09:02 PM ET (US)     Profile for masbama  Send Email to masbama     
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.
jimh posted 04-09-2004 09:22 AM ET (US)     Profile for jimh  Send Email to jimh     
[Edited article to improve readability.]

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