C-025 Bisquit

[Bisquit]

Last weekend I started the repower project. Earlier I removed the fairing over the propeller window. I was really pleased to discover that the hull mold and rudder for the boat were originally built for an inboard then modified for outboards. I just had to remove fairing skin on the hull and a block in the rudder and I had my window. Last weekend I cut a window in my cockpit floor to make the engine installation a whole lot easier. I did not re-core the cockpit floor (though it was needed) when I did the rest of the deck work in anticipation of this project. After I removed the cockpit floor I had easy access to hull and the liner. I cut back a little of the liner, dug out the foam, marked the center of the propeller opening then drilled a hole for a fiberglass stern tube. So far so good.


Cockpit Floor with access window cut out

Liner cut back to expose foam where prop shaft will enter

Center of prop window marked for drilling

Drilled for stern tube

Stern tube fitted in place

This weekend I'll build and align the engine bed.

[Bisquit]

As promised - a couple of pics of the cockpit before I cut out the window for the engine installation.

[Commander 147]

Wow, talk about bring back memories! Your pictures remind me of what I went through to convert Destiny into an inboard. But I did not cut the floor out of the cockpit. I can however see how that would make the job massively easier.

[Bisquit]

Any advise on the project?

[ebb]

Great cockpit signature can/cup holders there!

[Bisquit]

Thanks. I'm running prop programs for the Yanmar 2GM20F I plan to install and everything says that the aperture is too small for the engine to have good efficiency. The 18hp is plenty to push the boat but the prop should be a 16 x 11. three blade. By my calculations I would have to increase the pitch to at least 15 - 16 to get the prop down to the required 13" for the existing aperture. What are people running?

[Commander 147]

Any advise on the project?

Well I typed out this list of things I did to make the job go better and then the forum software refused the post and it was all lost. First time I've had that happen.


If you would like to talk about my experiences with the job you can call me. Here is a link to one of the things I will tell you about if you call. My phone is


http://www.pearsonariel.org/discussi...der-147/page10

[Commander 147]

You know these boats originally came with an Atomic 4 that ran wide open with a tiny 8" 2-blade prop. That is probably why the aperture for the prop is no larger than it is. I know you already have the engine but perhaps you could salvage an atomic 4 to put in her. Maybe not on your timeline however.


I have a friend who sails a Morgan 30 with an atomic 4 in it and he loves it. He can go to the auto parts store to buy any parts he needs.

[Bill]

There have been a substantial number of repowerings with Diesel engines and I've seen no complaints about the size of the prop aperture.

[mbd]

Thanks. I'm running prop programs for the Yanmar 2GM20F I plan to install and everything says that the aperture is too small for the engine to have good efficiency. The 18hp is plenty to push the boat but the prop should be a 16 x 11. three blade. By my calculations I would have to increase the pitch to at least 15 - 16 to get the prop down to the required 13" for the existing aperture. What are people running?

My Ariel was repowered by a PO with a Yanmar 2GM:
Specs: Yanmar 2GM 13 HP @ 3400 RPM, 15 HP @ 3600 RPM
Trans: 2.62:1
Prop: 13x11

Some old threads about my brief history with a Yanmar including prop programs, emails from prop shops, and excellent advice from a previous forum member:
http://www.pearsonariel.org/discussi...Inboard-Issues
http://www.pearsonariel.org/discussi...7-Ideas-wanted

Bill of Periwinkle (A-231) would be a great resource if he is still checking in. He did a wonderful rehab on A-231 and repowered with a 20 HP diesel.
http://www.pearsonariel.org/discussi...231-Periwinkle

Great job on your refit and good thinking on saving the cockpit sole for last!

[Bisquit]

My Ariel was repowered by a PO with a Yanmar 2GM:
Specs: Yanmar 2GM 13 HP @ 3400 RPM, 15 HP @ 3600 RPM
Trans: 2.62:1
Prop: 13x11

Some old threads about my brief history with a Yanmar including prop programs, emails from prop shops, and excellent advice from a previous forum member:
http://www.pearsonariel.org/discussi...Inboard-Issues
http://www.pearsonariel.org/discussi...7-Ideas-wanted

Bill of Periwinkle (A-231) would be a great resource if he is still checking in. He did a wonderful rehab on A-231 and repowered with a 20 HP diesel.
http://www.pearsonariel.org/discussi...231-Periwinkle

Great job on your refit and good thinking on saving the cockpit sole for last!

Thanks for the info. I am sure I will be able to sort the prop issue. Is you prop a 2 blade or three blade?

[mbd]

3 bladed. Pics, etc. are in the threads I posted above.

[Bisquit]

The prop question was decided by fate. I happened across a used 13 x 11 3 blade sailor in good condition - for 50 bucks. That is what I am goin with. I had a bit of a setback yesterday. I built a really nice engine bed. I created a framework with glass reinforced foam panel glued to a fiberglass sheet. The stringers were backed with 1/4" aluminium and I laid up 4 layers of 1708 biax over the whole thing then filled it and prepped it for an epoxy coat. All that was left was to glass it into the boat. That is when I discovered that a 21 looks just like a 12 upside down. The measurements I took from the old engine required 21" of clearance over the bed. I read 12". I designed for 16" to be on the safe side. Does anyone want a really nice engine bed? At least I know how to do it this time.



On the plus side the control panel came out really nice. I recessed it in the door behind the tiller head and built a removable box to protect the backside

[Bisquit]

Here are some pictures of the jig in place with the now useless bed.

[Commander 147]

You know I built so many things on Destiny twice I effectively built two boats. :-( So I feel your pain. But you are getting really close and we are all cheering you on to reach the finish line. BTW I sure wish I would have had that jig when I repowered Destiny.