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Author Topic: buying new boat,is motor to small  (Read 6836 times)

Offline Prohunter270

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buying new boat,is motor to small
« on: March 18, 2015, 05:11:55 PM »
I'm buying a 16' welded semi v sled.it has new merchant 9.9 and a 92 merchant 50 with jet pump. Do you think the 50 is enough to power it?

Offline Bill W

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Re: buying new boat,is motor to small
« Reply #1 on: March 18, 2015, 05:49:57 PM »
What's the previous owner's take on it?

A 50 Jet is probably more like a 30 hp as a jet isn't as efficient as a prop.

Offline turkeyfeather

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Re: buying new boat,is motor to small
« Reply #2 on: March 18, 2015, 06:09:20 PM »
What's the previous owner's take on it?

A 50 Jet is probably more like a 30 hp as a jet isn't as efficient as a prop.
Can the jet pump be removed and have a prop put on it? If so I think a 50 hp would be fine. 30 is a tad small and will certainly leave you wanting for more.
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Offline h2ofowlr

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Re: buying new boat,is motor to small
« Reply #3 on: March 18, 2015, 06:34:09 PM »
It would probably push it fine with up to two people and limited gear. Depends on weight of boat.  The older jets were less efficient than the new ones.  I ran a 60/40 jet.  You may not like fuel bill on it.
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Offline baker5150

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Re: buying new boat,is motor to small
« Reply #4 on: March 18, 2015, 06:37:43 PM »
18' Lowe with a 50 Merc.  2guys and gear it's fine.  Anymore weight and I feel like I could use more.
Prop not a jet.

Offline Cap.Silver

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Re: buying new boat,is motor to small
« Reply #5 on: March 18, 2015, 07:20:57 PM »
Not to be the one to tell you ...in swift water you will wish you didn't go with the 50 . My friend has 17 ' with 75 hp jet ..... it is slowwwwwwwwwwwwwwly getting out of the hole .....more like slug crawling . Just  :twocents:
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Offline Kuduman

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Re: buying new boat,is motor to small
« Reply #6 on: March 18, 2015, 07:46:52 PM »
Boat manufactures typically underpower New boats to allow for upgrades and inexperience. If this is a factory set up 're probably fine. Check the capacity plate for max hp and weight capacity. Also be careful if you exceed the hp rating it might void you insurance coverage.

Offline WAcoueshunter

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Re: buying new boat,is motor to small
« Reply #7 on: March 18, 2015, 07:54:12 PM »
My bro in law has a 15' Smokercraft with a 35 HP jet.  It won't plane with three guys, but will plane with two (although certainly not fast).  I'm guessing a little bigger on the boat and the motor would probably have similar results. 

Offline wildmanoutdoors

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Re: buying new boat,is motor to small
« Reply #8 on: March 18, 2015, 07:56:40 PM »
What's the previous owner's take on it?

A 50 Jet is probably more like a 30 hp as a jet isn't as efficient as a prop.
Can the jet pump be removed and have a prop put on it? If so I think a 50 hp would be fine. 30 is a tad small and will certainly leave you wanting for more.

Not that easy. There is a 5 inch difference in a prop and a jet.

Offline wildmanoutdoors

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Re: buying new boat,is motor to small
« Reply #9 on: March 18, 2015, 07:58:56 PM »
Boat manufactures typically underpower New boats to allow for upgrades and inexperience. If this is a factory set up 're probably fine. Check the capacity plate for max hp and weight capacity. Also be careful if you exceed the hp rating it might void you insurance coverage.
Boat manufactures have little to nothing to do with this. Dealers rig boats with motors, not manufactures. Dealers usually use less moter to keep price down.

Offline wildmanoutdoors

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Re: buying new boat,is motor to small
« Reply #10 on: March 18, 2015, 08:01:11 PM »
It would probably push it fine with up to two people and limited gear. Depends on weight of boat.  The older jets were less efficient than the new ones.  I ran a 60/40 jet.  You may not like fuel bill on it.
Only one company makes outboard jet lower units. They have and still lose 30% of the rated hp. Only sport jets by merc have better efficiency.

Offline wildmanoutdoors

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Re: buying new boat,is motor to small
« Reply #11 on: March 18, 2015, 08:03:24 PM »
Get on outboardjets.com and read up. It's all about weight with jets. If that boat is a 50 with the jet it's gonna be ok. If it's a 50 and converted, it will be a slug...

Offline Stein

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Re: buying new boat,is motor to small
« Reply #12 on: March 18, 2015, 09:25:47 PM »
I have a 16' riveted boat with a 40 hp prop and wish it was a 50.  With max rated load, I top out at 22 mph and my boat probably weighs a couple hundred less than yours.  At max weight, it bogs down when going over tide rips when you hit them from behind.  That is salt water performance which is much easier than dealing with river currents.

Unless there was some specific reason, I would tend to power nearly any boat at or very near maximum nameplate hp.

Offline Bofire

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Re: buying new boat,is motor to small
« Reply #13 on: March 19, 2015, 07:48:45 AM »
 :)My rule of thumb for boat motors is: read the plate on the boat what ever it says is max, get that!! power wise and weight of motor.
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Offline Camo

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Re: buying new boat,is motor to small
« Reply #14 on: March 19, 2015, 09:28:48 PM »
For reference, my previous boat was a 16' smokercraft sportsman with a Yami 60/40 jet. This was a tiller model with a built in 16 or 18 gallon fuel tank. With me and my gear it was a 29mph boat, with another guy it was a 23 mph boat. With 2 average guys and myself, it would get on plane but that was it. And that was running it on the wall and trimmed up. To keep weight down, I went back and forth between the 6 hp kicker, or the extra battery and bow mount trolling motor, depending on what I was doing. It was never a problem if you have patience but I always wanted more and I don't like to run a motor wide open.
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