Mounting Air Cooled 22HP Inboard in a Jon Boat

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fishingman1

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I am going to mount a 22HP horizontal "lawn mower" engine in a 14 foot jon boat. I am attaching a shaft to it and I need to run it through the bottom. Where do I get a seal and/or hardware to run the shaft through the bottom of the boat? I have a source for all of the other hardware.(I have a transmission, gear reducer etc from a kit I am purchasing)
 
GA_Boater

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

Does the kit supplier have the parts you still need?
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

No, the kit supplier does not have this part. If they did, it would take a long time to get it since its made in Thailand. Here is a pic of the part I am looking for. Its on a wood boat in the pic but I want one for an aluminum jon boat. Installed.JPG
 
GA_Boater

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

fishingman1 said:
No, the kit supplier does not have this part. If they did, it would take a long time to get it since its made in Thailand. Here is a pic of the part I am looking for. Its on a wood boat in the pic but I want one for an aluminum jon boat. View attachment 226012
Click to expand...

You don't want that part for a jon boat. The shaft will come through the bottom of the hull through a stuffing box/shaft log http://www.glenwoodmarine.net/Catalog/SHAFT%20LOG.pdf and you need a strut to support the shaft before the propeller. Like this - http://www.glenwoodmarine.net/Catalog/STRUTS.pdf

And a rudder too http://www.glenwoodmarine.net/Catalog/RUDDERS.pdf

These are simply examples, I don't know exactly what sizes you need, but there is more hardware required.

What brand of kit do you have? Any pics?
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

Just curious- What other suppliers in the US make these types of parts?
 
GA_Boater

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

You are making a mud motor or using parts for a mud motor. The stuff I linked is for traditional shaft drive.

What are your plans?
 
Bondo

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

GA_Boater said:
You are making a mud motor or using parts for a mud motor. The stuff I linked is for traditional shaft drive.

What are your plans?
Click to expand...

Ayuh,.... Good question,.... I don't think fishingman1 knows what is listed on his link, Ain't a mudmotor,...

Welcome Aboard, fishingman1,.... What are yer intentions,..??
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

I don't have any definite plans yet. I am just checking to see what my options are. I don't think it would make a good mud motor since the prop is 16 inches tall. You wouldn't be able to go through very shallow water.
 
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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

fishingman1 said:
I don't have any definite plans yet. I am just checking to see what my options are. I don't think it would make a good mud motor since the prop is 16 inches tall. You wouldn't be able to go through very shallow water.
Click to expand...

Ayuh,.... Well, that's not a good option for yer jonboat,....

It's a drive used in Southeast Asia, not 'round here,....
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

I am not necessarily saying that I will definitely use it with a jon boat. Right now I am just brainstorming and researching. I have seen home-made jon boats(mud boats) made with this type of setup. They sourced all the parts in the US and custom made them.(didn't have a kit.) I have never seen one in person. I saw this used one for saleProp.JPGmud 1.jpg. I think it is actually a fiberglass boat. He wanted $15K for it but I am sure that is because he had a lot of time invested in making it. However, that is a mud boat and I am not wanting to build a mud boat. I'll probably use an engine similar to this one:
386447-3079
What boat or style of boat would you suggest I mount this in?
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

One other note about those pics- I assume that guy used a smaller prop on his since it was direct drive. I will be using a gear reduction box so I will be using a 16in prop.
 
Bondo

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

fishingman1 said:
I am not necessarily saying that I will definitely use it with a jon boat. Right now I am just brainstorming and researching. I have seen home-made jon boats(mud boats) made with this type of setup. They sourced all the parts in the US and custom made them.(didn't have a kit.) I have never seen one in person. I saw this used one for saleView attachment 226075View attachment 226076. I think it is actually a fiberglass boat. He wanted $15K for it but I am sure that is because he had a lot of time invested in making it. However, that is a mud boat and I am not wanting to build a mud boat. I'll probably use an engine similar to this one:
386447-3079
What boat or style of boat would you suggest I mount this in?
Click to expand...

Ayuh,.... For $1,500.00,.... I'd think you'd be Waayyy further ahead to forget it altogether, 'n go with something that can be done with locally available parts,...

The 1 in yer pictures has a trashed prop,....
Why set yerself up for disappointment,..??..??..??
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

So... Where can I source a transmission, gear reducer, etc?
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

I assume that he has a trashed prop since he used it as a mud motor. I am not going to do this.
 
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fishingman1

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

haha
I was researching the internet and there used to be a company in the US that made kits a long time ago but it doesn't exist anymore REO Trollabout was the name of the kit. Thought this was interesting. I attached a pic I found in another forum.Kit.JPG
 
GA_Boater

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

I'm going to ask again - What you trying to make? A skinny water boat, a unique one of a kind boat, or just foolin' around?

If you want a skinny water one, graft a PWC power train to the jon boat. That's been done many times.
 
Scott Danforth

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

your going to spend $1500 on a kit, and another $1300 on a V-twin Briggs van guard? :facepalm:

spend the $2800 on a boat that is water ready and go boating 5 minutes after you register it and put the decals on the side.

or spend $500 on a project boat, strip out the running gear and put it in a new hull that you can build (you have $2300 left over for materials)/
 
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HT32BSX115

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Re: Mounting Air Cooled 22HP Inboard in a Jon Boat

fishingman1 said:
haha
I was researching the internet and there used to be a company in the US that made kits a long time ago but it doesn't exist anymore REO Trollabout was the name of the kit. Thought this was interesting. I attached a pic I found in another forum.View attachment 226081
Click to expand...

Howdy,



I am totally getting what you want to do. The BS Vanguard is a pretty good engine but you would need to have either a belt or gear reduction to swing a 16" propeller or you would never be able to get that engine to turn any sort of "correct' RPM. (which to work correct would be around 3600 at WOT)

Just off the top of my head, you would need at least a 2:1 reduction (maybe more) The Surplus Center Surplus Center and others have reduction gear boxes that are shaft mounted, right angle etc and pulleys, and clutches ......

If it were me, I would use an offset (prop) shaft and a double sheave belt reduction and an electro-magnetic clutch (like the clutch used on a lawn-mower deck drive) . You would need a belt reduction because you would need to experiment with different size pulleys to change the reduction to match the (fixed) prop diameter and pitch.

My 22HP John Deere has an electric clutch to drive the 60" 3 blade mower deck similar to the following
12 VDC TWO A-BELTS CLUTCH (FITS 9-1737 & 9-1738)

You would mount that clutch to the prop-shaft and vary the size of the crankshaft pulley for the correct reduction.



Understand, NONE of this project will be very cost-effective. It would be MUCH cheaper to just buy a small used (2 or 4 stroke) outboard motor and go boating.

OTOH, If you want to do a one-off cool project, then of course, money is no object!!


Cheers,


Rick
 
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