Kicker Horsepower

heyketz

Cadet
Joined
Oct 5, 2011
Messages
14
What size (horsepower) kicker would be good for a 16 foot fiberglass boat and longshaft or shortshaft?
 

Beefer

Lieutenant Commander
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Aug 4, 2008
Messages
1,737
Re: Kicker Horsepower

I'd venture to say a 9.9 would be more than sufficient, but it depends on the boat. Is it a tinny, CC, bowrider? Same goes for the shaft. Measure the height from the bottom of the hull to where it will be mounted, and go from there.
 

Home Cookin'

Fleet Admiral
Joined
May 26, 2009
Messages
9,715
Re: Kicker Horsepower

16 is small for a kicker (gas outboard). Perhaps you want a trolling motor? Even then the outboard on a 16 can usually be used for trolling (unless you need to avoid the noise).

Size of an auxillary motor will also be determined by hull shape and boat weight, as well as conditions where it will be used: a quiet lake, or against current and strong wind?

Shaft length depends on how it is mounted, which is driven by the size and shape of the transom. Often they are mounted on brackets which raise or lower them (necessary to clear the main motor) which will determine shaft length.

That's a long way of saying your question requires more information, starting with purpose and your boat's details.
 

ezmobee

Supreme Mariner
Joined
Mar 26, 2007
Messages
23,767
Re: Kicker Horsepower

Even a 4HP would probably be sufficient on a 16'. 8-15HP would be ideal. Definitely no larger. I'd personally prefer a long shaft for a kicker motor. The kicker isn't going to plane the boat so a little extra leg in the water isn't going to be a big deal and will help insure your lower isn't bouncing out of the water in rough conditions.
 

stylesabu

Master Chief Petty Officer
Joined
Aug 2, 2009
Messages
849
Re: Kicker Horsepower

I had a 16 ft deep v sylvan 1983 there really wasn't much room on back for a kicker, when i went to a lund 2000 pro v it has a much wider transom,a 15 hp works nicely, a friend has a simalar Lund and a 9.9 works just fine. both do about 5-6 mph on the water.
 

dan t.

Lieutenant Junior Grade
Joined
Feb 28, 2008
Messages
1,137
Re: Kicker Horsepower

I ran a Merc 4.5 on a 16 ft Sangster, standard shaft, perfect for trolling,got me in from 9 miles out one time when the C.D. box died on the 80 hp main.
 

JoLin

Vice Admiral
Joined
Aug 18, 2007
Messages
5,146
Re: Kicker Horsepower

I had a 15 hp Merc mounted as a kicker/backup to the 175 Johnson on my 21' Pro-Line WAC. I could easily reach hull speed (6 or so mph) in a 20 mph head wind and a foot or two of chop.

4-5 hp will easily move your boat around. A 9.9 will move it through anything.

My .02
 

etracer68

Ensign
Joined
Oct 11, 2009
Messages
906
Re: Kicker Horsepower

DSCF0206.jpg

I have used this 4HP on my 16ft glass boat without any issues, even in 2 footers on lake Michigan. I dont tow (trailer) the boat with it on though.
 

Home Cookin'

Fleet Admiral
Joined
May 26, 2009
Messages
9,715
Re: Kicker Horsepower

what is the reason or reasons to have an OB kicker on a 16' boat in the first place? I see it as a false economy.

On the down side, you have weight, expense, loss of space and a crowded transom. Gets in the way fishing and docking, gets stolen from the trailer or a pain to remove each time. Don't use them much and they are as unreliable as the main motor.

A possible benefit, you have a motor you can use for trolling, but you can just as well use your main motor, so disregard that. Further, an electric troller is better for fishing (quieter) costs less and takes up less room, and can be bow mounted.
Another possible benefit, the kicker uses less gas than the main, but you will never save enough in gas money to pay for the cost and expense of the kicker, so disregard that one.

For safety (in case of break down) are you really taking a 16' out where there is no help? Anyone can tow a 16', and they can be paddled/shoved if needed. Not to mention sea tow costs less than an OB. Few people posting here are boating in the wilderness. A story that it got you home once doesn't justify having it all the time, IMO, and if you use it a lot due to break-downs, you have a larger problem.

Maybe it's a regional thing. Seldom see them on the hundreds of small boats around here or other coastal regions I know (except sailboats, of course). Before sea tow, cell phones and affordable radios, you saw them sometimes on boats that went several miles out, as a back up, but even those guys don't have them now.

I've seen new boaters assume they need one, like they need an anchor or flares, but I don't think that's right.

Thoughts?
 
Joined
Oct 11, 2011
Messages
8
Re: Kicker Horsepower

If trolling is what you are after, a bucket on a rope makes a great speed reducer. If you are scared that you might break down, get Sea Tow. If you do break down a lot, get a new mechanic.
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
Re: Kicker Horsepower

View attachment 121590

I have used this 4HP on my 16ft glass boat without any issues, even in 2 footers on lake Michigan. I dont tow (trailer) the boat with it on though.

Etracera, nice installation, when you push your boat with aux engine, where does water flow pass against the leg, over or under small plate ? Need to install a 18 short shaft as a aux on a large boat that uses a 225 HP as main, the engine supporter which has 5 height settings has not been installed at this moment and was wondring the most convenient way to do so and not start making guessing holes for the support all over the transom. Is your engine seen on the pic, a short or long shaft ?

Happy Boating
 

etracer68

Ensign
Joined
Oct 11, 2009
Messages
906
Re: Kicker Horsepower

Sea Rider, the aux motor is a short shaft. The mount has 5 settings also @ 12 inches. When Im useing the main, I have the aux kicked up, and water doesnt come anywhere close to it. When useing the aux, the 2nd setting from all the way down, the AV plate will be at the bottom of the boat, if its rougher water, I put it all the way down, then AV plate is 3 inches below bottom of the boat.
I clamped the mount to a OB motor stand, and measured where the AV plate was in relation to the mount bottom in the all the way down posititon. With those measurments, I could then know where it needed to be on the transom. Its best to have two people when bolting it to the boat. Hope this helps.
 

etracer68

Ensign
Joined
Oct 11, 2009
Messages
906
Re: Kicker Horsepower

Sea Rider, Also make sure your mount is rated for the weight, and HP of your 18HP aux motor. Also mine is rated to leave the motor on while trailering, I would have to tie it down, so as to it would not bounce up. Mine is not heavy, under 50 lbs, so no big deal to take it off and on. The mount I have is an over kill for the weight and HP of an 4HP or my other 7.5HP. I just have not needed the 7.5HP.

As far as responding to Home Cookin, you do have some points. But I have to get my butt to work now and dont have the time to respond, but will. :D
 

etracer68

Ensign
Joined
Oct 11, 2009
Messages
906
Re: Kicker Horsepower

Just so Im clear, when I say bottom of boat, Im saying directly in front of the aux motor. I read your other post, and I think there may have been some confusion.
 
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