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  Speed of Montauk with 5hp kicker?

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Author Topic:   Speed of Montauk with 5hp kicker?
specktrout posted 09-17-2002 11:31 PM ET (US)   Profile for specktrout   Send Email to specktrout  
I seem to be venturing farther and father offshore in my '89 montauk. With an engine older than 10 years (despite meticulous maintenance), I am considering buying a small kicker for that "just in case" day that I always fear might happen when I start loosing sight of the beach. Could anyone with experience please tell me how fast a small kicker engine (around 5 hp) will push a montauk. I am sure it would be enough in calm water, but what about a 10-15 mph headwind and 4-5 foot waves? Thanks for any info-
John from Madison CT posted 09-18-2002 07:31 AM ET (US)     Profile for John from Madison CT  Send Email to John from Madison CT     
When I had my Montauk, I too was always a worry wort and bought a kicker.

It was a new Tohatsu 5hp 4 Stroke, bolted directly to the starboard transom side.

I learned that anything much over 5-6 knots required alot more power and clearly diminishing returns on power vs. speed. Every hull has a "displacement" speed and trying to go over the 5-6 knot range showed that the Montauk began to approach displacement speed fairly quickly.

Going to a larger OB, like a 10hp would not really buy you additional speed as you would reach hull limitations the same way.

Personally the 5hp OB was plenty for me.

John from Madison, CT

JCL posted 09-18-2002 08:56 AM ET (US)     Profile for JCL  Send Email to JCL     
Mine is 8 hp Evinrude 2s,58 lbs, GPS 6 mph Mercs are 78 lbs and 4 strokes are heavy.
Tried a friends 5 hp 4s Nissan,5.2mph. Looking at 5 hp Merc 2s which is stronger to reduce transom weight. The Nissan is not as strong as the Merc, anticipate 5.5 mph. Reaching displacement speed so larger motor is non productive. In heavy seas or winds you would have to be going with them or quartering to make much headway but it works great otherwise. the added weight caused my boat to porpoise and sit too low in water so I am looking at the 5 hp Merc 2s
Jon
JCL posted 09-18-2002 09:27 AM ET (US)     Profile for JCL  Send Email to JCL     
To clarify, I have a 100 Merc 2s 350# with 58# Evinrude and bracket over 420 lbs on my 79 Montauk and I am not happy with the way it handles and porpoises. I had a 300 lb Merc 90, handled great. That is why I am looking to downsize the kicker to a 5 Merc 2s at 42 lbs and possibly eliminate the brkt.
I have the Evinrude kicker mounted on a bass pro shops swing down mount. It is a short shaft and sits vertically out of the water in the up position. Works fine
Problem with the Merc 5 is that the tilt mechanism looks fragile and I am not sure how it would work tilted up in rough water.
another disadvantage is that tilted up it intrudes into the cockpit space where the swing down places the motor back out of the way. A long shaft merc 5 mounted directly would be a good set up if the tilt mech. is strong enough to support it. Finding a used 5 is tough. Best new deal is at West marine or Outboardsales.com JCL
Bigshot posted 09-18-2002 10:05 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
OH JCL.....Nissan makes the 5hp Mercury, maybe Tohatsu makes it. Anyway the merc, Nissan, and Tohatsu are EXACTLY the same. The Mariner 5hp used to be made by Yamaha until 1988 or so and then it joined Merc with the Nissan engine. The only reason I know this is I had an older 5 Mariner and was looking for a cowl.
Dick posted 09-18-2002 10:46 AM ET (US)     Profile for Dick  Send Email to Dick     
Again, Big Shot is correct. Nissan/Tohatsu makes the Merc 5 and below. Not sure about the 6 and 8.

Wonder if any Merc technology is going into the larger Nissan/Tohatsu line, you scratch my back I'll scratch your's.

jimp posted 09-18-2002 11:20 AM ET (US)     Profile for jimp  Send Email to jimp     
specktrout -

I had a Yamaha 6 on my Montauk (along with a 90 Evinrude). Would do about 5.5 kts. Bucking into head seas or a 10-15 kt wind will drop the speed considerably. You won't get anywhere fast, but you still might get there.

Getting pushed offshore, getting beat up in 4-5' seas is a good time to have a good radio and call for help. Your kicker may keep you from getting blown farther offshore, making rescue quicker. After getting towed, the kicker can also help you make the dock on your own, or snag a buoy, or make the launch ramp. The kicker is a good piece of safety equipment.

JimP

JCL posted 09-18-2002 12:15 PM ET (US)     Profile for JCL  Send Email to JCL     
Good info on the manufacturer's. Thanks Bigfoot. Would anyone know if a 3.3hp 2 stroke would push my Montauk enough to "get home" and troll on our usually calm Arizona lakes? I really need to get some weight off the transom. BTW, my friend that has the 4 stroke 5 hp Nissan said it was noticeably less powerful than the 2 stroke 5 hp (Merc decal) he had
previous although he likes the Nissan. JCL
JCL posted 09-18-2002 12:31 PM ET (US)     Profile for JCL  Send Email to JCL     
As a footnote. Noticed that both the Tohatsu and Nissan 5 hp 2s have only internal gas tanks (about 3 qts)while the 5 hp Merc has both the internal tank and external conn.for a remote tank.
It appears the price is about $100 less than the Merc also. JCL
11 footer posted 09-18-2002 02:25 PM ET (US)     Profile for 11 footer  Send Email to 11 footer     
I have an 8hp merc for sale.

11

Bigshot posted 09-18-2002 02:43 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I think a 3.3 would work but those 5hp are really light as well. The fact that the bigger hp's have reverse is no use either because it would be easier to fend off than to try and reverse one with a 5hp. I would shop for a used one on e-bay.

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