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Author Topic:   1998 Montauk 90hp Merc
Lobo5656 posted 08-29-2003 08:44 PM ET (US)   Profile for Lobo5656   Send Email to Lobo5656  
My 98 Montauk has a 90 HP merc 2 stroke the problem is i can't
get any speed out of it im lucky if i get 32 mph . I was getting 38- to 40 mph sonetimes faster . I changed the hub on the prop no change i put a SS Raptor Prop 13-1/2 - 21 it ran so bad I took the prop back. The old prop is also a 13-1/2-21.
Just can't figure out what the problem is. This boat was so fast for a 17' it was scary at top speed.
bkovak posted 08-29-2003 10:02 PM ET (US)     Profile for bkovak  Send Email to bkovak     
Lobo5656, I don't know how much difference there is between your 1998 Merc 90 and my 2001 Merc 90 but, I was hitting around 45 mph with a 19 pitch prop on my Montauk. Might want to try changing your prop again. Brian
Lobo5656 posted 08-29-2003 10:36 PM ET (US)     Profile for Lobo5656  Send Email to Lobo5656     
Anybody esle with a merc 90 on a Montauk what prop are you running.
Clark Roberts posted 08-30-2003 06:51 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
I'm assuming that you have the current 84 cubic inch Merc 90 and not the 71 cubic inch version. My last 17 (a Newport model 1980) with a Merc 90hp (1996) had a 20" pitch Quicksilver Hi-Five SS prop and would swing it at 5600rpm and somewhere between 45 and 49 mph. Clark ... SCN
Lobo5656 posted 08-30-2003 10:05 AM ET (US)     Profile for Lobo5656  Send Email to Lobo5656     
Sorry i put the wrong prop size in my first post it"s a 13-1/4 by 21
montauk madness posted 08-30-2003 11:14 AM ET (US)     Profile for montauk madness  Send Email to montauk madness     
I have a 1992 Mercury 3 cyl 90HP on a 91 Montauk. I run a 13.25 x 19P and hit about 43 at 5600. My motor is up two holes.


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