Moderated Discussion Areas
ContinuousWave: Whaler Performance
Montauk 170 prop
|Author||Topic: Montauk 170 prop|
posted 03-20-2003 07:15 PM ET (US)
I'm currently running a 13" x 21p Black Max aluminum on my 2 stroke 90 merc and turning about 5000-5100 rpms. I would like to get into the upper portion of the operating range.
Knowing I need to drop in pitch:
If you have a Montauk 170 with a 2 stroke 90,
Would a Mercury Vengeance 13 x 18p be to big of a drop?
Is there a Mercury prop that you would recommend?
I have a line on a reconditioned SS Mercury 13 x 19, it doesn't have the mercury flow torque hub system. When was that system introduced?
I've also found a brand new Mercury Black Max aluminum 13 x 19 for $95.
Thanks in advance for your thoughts,
posted 03-21-2003 10:05 AM ET (US)
Skip the alum and get the recond 13x19. That new hub system is neat and really new but obviously not necessary.
posted 03-21-2003 12:50 PM ET (US)
I changed to the Laser II. I would highly recommend it.
posted 03-21-2003 04:49 PM ET (US)
I'm going to test the reconditioned SS
13 x 19 Saturday.
posted 03-21-2003 10:31 PM ET (US)
I have a 2001 dauntless 16 with the same motor. I switched from the stock merc 13x21 and went to a 13x19. The 13x21 did 43mph at 5200 rpm, 13x19 does 41 at 5500 (sneaks to 5600 if I am not careful w/light load). The acceleration is much better as expected, but I lost a little top end.
posted 03-24-2003 06:43 PM ET (US)
I must say I'm feeling a bit sheepish to report my propeller findings.I had a great day to field test different props today..."piece of glass" calm on Lake Washington.
The 13 x 19 SS reconditioned was first on the agenda and totally trimmed I was out of the operating range. This puzzled me thinking that 19" of pitch would bring me close to the 5500 rpms I was after.
I then re-installed the aluminum 13 x 21 and totally trimmed out I was right at the the high end of the range- 5500 rpms and 44.4 mph on the GPS.
Being this is my first boat with power trim, I wasn't trimming the boat out far enough, (The 15' sport had an adjustable thrust rod, the pick a hole system)and don't run much in the type of water that I was lucky enough to see today.
Feeling stupid but learning,
posted 03-25-2003 06:39 PM ET (US)
Thanks for reporting your findings. My 170 with a 4-Stroke 90 turning 6000 RPM running a 13 X 18 Vengeance prop gives 42.0 MPH average. Looks like the 2-stroke has a bit more top end. We will have to have a side by side comparison at the rendezvous this summer if you know what I mean.
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