I know this sounds a little nuts, but I want to turn my Typhoon into an inboard auxiliary powered sloop. I am tired of the outboard hanging off the stern of my Typhoon. I am trying to locate a manufacturer of small inboard engines. I have an 8" x 14" access to my bilge through the cockpit sole. The depth of the bilge is about 16". So that's what I've got to work with for dimensional limitations. I have looked a Volvo Penta and Yanmar, but their smallest engines (about 7-10 hp) are too large, and too much power. Are you familiar with any manufacturer of small marine inboards that may meet my needs? Thanks if you can help.
rick.parish@honeywell.com
Small (very small) inboard engine for a Typhoon
Moderator: Jim Walsh
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Bill Bloxham
Re: Small (very small) inboard engine for a Typhoon
Slightly nuts, indeed.
I gave this very matter a great deal of thought a few years ago, and went so far as to measure engines at the Annapolis show after I drew up a lot of plans. I had a few semi-workable ideas, and a few obstacles I couldn't see over.
The best bet for an engine might be (don't laugh) a lawn mower motor, or a small gas Briggs & Stratton air cooled unit. With a belt drive to the shaft and a cooling fan driven off the belt, you might have a workable set up as far as the engine goes. I think 3 HP would be plenty.
Plenty noisy, too.
The prop shaft is another matter entirely. Where does one put it?
The rudder post is too darn expensive to replace with a post that has an aperture built in. Running the shaft off the centerline would avoid that problem, but the prop cut out in the rudder would not allow large rudder swings. I realize that large rudder swings stall the boat, but sometimes that's the point. If I'm approaching the pier too fast (and yes, even Ty's can go too fast sometimes) the famous rudder stall looks better then running to the bow and putting out my arms to fend off the pilings.
So how about a saildrive type unit by the side of the keel? Could be done, but it sounds like a lot of work. Once again, the belt drive would save a lot of expensive engineering and fabrication. Making it retractable would be a horrendous amount of work, and fixed it would generate a lot of drag. You might have to lengthen the mast...
So what I have done was to buy a Bristol Bronze knock-off of the original Ty removable motor mount. When you are finished motoring, throw the 2 or 3 horse lightweight in the cabin and sail.
And I bet you get two more sailing years out of the boat if you don't try the inboard thing. If I did it when I intended to, three years ago, I bet I'd still be working on it.
Finely, look at the expense. Add all those costs up, and you could buy a 25D. A Ty on steroids, so to speak, and with better resale value.
Boy, am I glad I got that off my chest.
If you do go ahead, feel free to email me about the project. Nothing like doing what can't be done. If you are near Barnagat Bay, I could offer constructive critism in person.
Good luck.
Bill
mmmmmmbill@aol.com
I gave this very matter a great deal of thought a few years ago, and went so far as to measure engines at the Annapolis show after I drew up a lot of plans. I had a few semi-workable ideas, and a few obstacles I couldn't see over.
The best bet for an engine might be (don't laugh) a lawn mower motor, or a small gas Briggs & Stratton air cooled unit. With a belt drive to the shaft and a cooling fan driven off the belt, you might have a workable set up as far as the engine goes. I think 3 HP would be plenty.
Plenty noisy, too.
The prop shaft is another matter entirely. Where does one put it?
The rudder post is too darn expensive to replace with a post that has an aperture built in. Running the shaft off the centerline would avoid that problem, but the prop cut out in the rudder would not allow large rudder swings. I realize that large rudder swings stall the boat, but sometimes that's the point. If I'm approaching the pier too fast (and yes, even Ty's can go too fast sometimes) the famous rudder stall looks better then running to the bow and putting out my arms to fend off the pilings.
So how about a saildrive type unit by the side of the keel? Could be done, but it sounds like a lot of work. Once again, the belt drive would save a lot of expensive engineering and fabrication. Making it retractable would be a horrendous amount of work, and fixed it would generate a lot of drag. You might have to lengthen the mast...
So what I have done was to buy a Bristol Bronze knock-off of the original Ty removable motor mount. When you are finished motoring, throw the 2 or 3 horse lightweight in the cabin and sail.
And I bet you get two more sailing years out of the boat if you don't try the inboard thing. If I did it when I intended to, three years ago, I bet I'd still be working on it.
Finely, look at the expense. Add all those costs up, and you could buy a 25D. A Ty on steroids, so to speak, and with better resale value.
Boy, am I glad I got that off my chest.
If you do go ahead, feel free to email me about the project. Nothing like doing what can't be done. If you are near Barnagat Bay, I could offer constructive critism in person.
Good luck.
Bill
mmmmmmbill@aol.com
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Michael Stephano
Re: Small (very small) inboard engine for a Typhoon
There is a company in California called Brown Marine. They marinize small gas engines such as Briggs or Tecumsah. You can install the shaft slightly off center from the keel. This was done in the last boat I owned a 27 foot hereschoff design. The engine was mounted with a turn to port to allow the shaft and wheel to clear the rudder. this arrangement worked just fine and I had no problems at all. It will require a strut for the bottom of the boat.
mundo@visi.net
mundo@visi.net
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Kurt B. Kaiser
Re: Small (very small) inboard engine for a Typhoon
I saw an interesting installation at the Apprenticeshop in Rockland, Maine. It was a very small wooden launch, maybe 14 ft. They had used a small diesel engine to run a hydraulic pump, with hoses to a hydraulic motor which turned the prop. The motor can be offset or above the prop. Reversing was apparently handled by valves. You could no doubt get more info directly from them.
Regards, KBK
kbk@deletethis@shore.net
Regards, KBK
kbk@deletethis@shore.net