kicker motor question

I have a 25hp tiller i use on my jon boat…you think that’d be a good kicker for my wellcraft 250 sportsman? Use it for trolling…has a 9x13 prop. Thanks

Mike
14’ Polarkraft 25 rude
17’ Hydrasports basser, project pictures coming
Wellcraft 250 Sportsman, complete transom replacement, pictures coming soon

are they going to use the same fuel source?

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no. Sounds clumsy but, so I can use small motor for both big boat and jon, I would carry 6 gallon tank onboard

Mike
14’ Polarkraft 25 rude
17’ Hydrasports basser, project pictures coming
Wellcraft 250 Sportsman, complete transom replacement, pictures coming soon

yes it will work

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Sounds good. Now, I was planning on just getting on of those small mounting brackets…the one that you can adjust up/down
How would you determine the best position for that to be in as far as how high on transom and how far away from big motor? Thank you sir

Mike
14’ Polarkraft 25 rude
17’ Hydrasports basser, project pictures coming
Wellcraft 250 Sportsman, complete transom replacement, pictures coming soon

I have a 9.9 4 stroke suzuki on my 24’ Grady. It pushes the boat at only 4.5kts. (Less if into the wind) Your 25 will push your 25’ boat very nicely as a kicker. I’m going to guess you could get 5 to 7kts.

My kicker is mounted on my Stainless Marine Outboard Bracket with a specifically mfg’d mounting plate. (Permanent) I looked and considered the tip down units you are considering and decided against them. You should be aware of the weight capacity of those brackets. Your motor may exceed the capacity of the bracket.

My kicker prop (when down and deployed) is right at the bottom of my hull. All the service people I spoke with (from both Seels and Hanckel)suggested it doesn’t really matter if the prop is below the hull. They suggested that since you never plan on obtaining planing speed, the motor will push the hull just fine as long as it’s underwater at all times (and speeds) and not cavitating.

dssmith - You have a PM.

SeaPro 23 WA Yam 225
Key West 17’ Stealth Yam 115
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DsSmith, thank you for the info. I had considered those tip down style brackets being too light duty but…I figure I might be able to find one that is rated for the weight and if not, I can do a little reinforcing.
So, let me see if I am picking up what your dropping. When your kicker is down, the prop is level with the bottom of the hull? Or is the cavitation plate level with it? I was just thinking about trolling and possible hitting some water rough enough to pull that prop out of the water…so was thinking maybe I would go pretty low with it. Like you said, doesnt really mamtter as long as prop stays in the water…not like Im worried about where it is trimmed!
Thanks for the info sir

Mike
14’ Polarkraft 25 rude
17’ Hydrasports basser, project pictures coming
Wellcraft 250 Sportsman, complete transom replacement, pictures coming soon

If you’re interested, I’ve got a kicker bracket that had a 15hp mounted on it. I believe it’s rated for up to a 30hp.

You can have it if you want it. It’s just collecting dust in my garage.

My main 250hp motor has the cavitation plate just under the hull. The prop, is obviously lower. When on a full plane, trimmed to the max, my cav plate rides just barely above the water. (This is all like it should be for most outboards)

My kicker prop is a little higher. My kicker is off to the side, so the cav plate is above the hull line in the inside (towards the centerline of the boat) and “below” the hull line on the outside of the hull line.

Of course, the kicker never gets the boat on a plane. The cav plate on a kicker is useless and always under water on my big boat. If you were to put that 10hp motor on a john boat, it would plane the boat and the cav plate would likely be on top of the water at plane. This situation never occurs on my big boat.

My theory is, and that was confirmed by my conversations with Bobby Gehlken (His son fabricated my kicker bracket on my SS Marine Bracket) as well as that of the people at Seels and Hanckel, the kicker prop will pull water from in front of it and push the water out the back and propel the boat. It doesn’t matter if the prop is below the hull completely so long as there is water (without air, obviously) in front of the prop.

Thus, I conclude, a kicker placement is not as critical as the placement of the regular motor on a larger boat. Submerged prop and cav plat is OK for a kicker.

dsmith is dead on
as long as its low enough to stay in the water, placement doesnt really matter

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Roger. Thank you gentlemen for the info. Bottoms up you have a PM

Mike
14’ Polarkraft 25 rude
17’ Hydrasports basser, project pictures coming
Wellcraft 250 Sportsman, complete transom replacement, pictures coming soon