New comer fitting small Diesel engine

Because of the forum section I smelled a daring project, that triggered my interest. Just changing an engine for a smaller one doesn't qualify for "daring".

Changing direction of rotation can be done with a chain and at least one idler. Simple, inexpensive, but a bit messy unless the chain runs in a closed casing.

 

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P.S. welcome to the forum.

 

Thanks CDK.

Thanks for the welcome.
Daring is something I am trying to avoid.
I do have some engineering knowledge. But no background with boats.
So I hope to have the benefit of the combined brains trust called your forum.
So if you don't mind I will be posting what you might think is trivial questions, but the answers will perhaps prevent me from making an almighty stuff up.
I am now drawing up plans for a twin drive counter rotating shaft drive.
Again thanks.

 

Don't waste yopur time and money on twins, just do the single as you asked.

 

Why bugger a good caporn instead of putting a pair of small diesels in. I suspect you know about as much as the o p on this matter . Which is not much. I am speaking from experience having done something similar recently. A pair of 20 horse engines would give good handling and be easier to fit. You can get twin cylinder air cooled diesels for $1500 each. Adapt gearboxs . Good ducting and sound insulation should make quite a good set up.

 

whitepointer,

don't get stroppy mate, cos you disagree with my opinion, as the original question says there is accomodation in the old Caporns for single as well as twin engine arrangements, as you know cos you just did it.
All I am saying is , for such a small vessel, surely a simple arrangement is more than satisfactory (and half the cost).

 

I didn't say i did it to a caporn. Mine was a savage lancer which i swapped from twins to single and the result was a lot of work for little gain. Before that i converted a stern drive to tunnel which worked well but still to much work. From now on i my restos will be as close to original as possible. If i change a whole drive line i think i would rather build a new boat. Old mate with the caporn would be better off hanging a 20 horse honda on the back if he wants one engine and more cockpit room.

 

Well that is also true, the Honda is a great idea.

 

Is this to move the boat once in a while, or is this to use on a regular basis?

You can order diesel v-twin engines with transmissions on em for cheap from china.

 

Diesels are fine if you will be running many hundreds of hours a year, but 18HP Honda lawn equipment or generator motors would be inexpensive and far cheaper to quiet and less money to service. And parts will be available in years to come, unlike Chinese bargains.

The 20 HP Wisconson might be a choice too.

IF a diesel is preferred check with the local big truck reefer repair places and get running takeouts , Kubota or Yanmar , 3 for a Grand or so.

 

Most chinese engines are clones of popular engines.
Reefer engines could be an awesome option.

Gas would be way cheaper.

 

If you put in 1 engine to chain drive 2 shafts, you'd have to also put in 2 thrust bearings.

An outboard would give more room and much better maneuverability than a single inboard.