how to remove old 4-107 from an OI 41?

evasion · #1 (**permalink**) 09-29-2008

I need to rebuilt the unit after 33 years.

My morgan as the passageway between cabins.

Is there a trick to remove it and put it back from the central cockpit without cutting the cockpit sole?

I also need best places to buy rebuilt kit for that motor and Paragon P-24-L.

thanks

CaptainForce · #2 (**permalink**) 09-30-2008

I don't have the walk-through, so I won't be much help, but I did reove my Westerbeke 4-107 by first remove all attachments and then sliding it up a plywood ramp to my companionway. I then raised it with a block on my boom. I very well suported the boom with slings from a couple of halyards above as I was worried about bending it, but I had no problems. I slid the engine to the back of the boom and swung it to the dock. I replaced it with a Yanmar 56hp,-I always felt under powered with the westerbeke, especially with the hp sapped by that huge paragon transmission. Good luck, Aythya crew

fcsob · #3 (**permalink**) 10-01-2008

A friend of mine had his replaced. He explained it to me. Had to cut a small opening in the cockpit sole, large enough for a chain hoist. Slide it out the engine room door on a plank, down the walk through & have it hoisted up the aft hatch. What a pain ,but it is a boat.
Steve

evasion · #4 (**permalink**) 10-03-2008

fcsob, I think I will try to use a halyard thru the compass hole first instead of cutting the cockpit sole. Will see...

Captain force, how many knots you can go with new Yanmar compare to old westerbeke.

My 4-107 is coupled with Paragon tranny P-24 ( 2,5 for 1 ratio) and 17X17 propeller.

What was your old set and new one?

merci

CaptainForce · #5 (**permalink**) 10-04-2008

evasion, We used to average 5kts with the westerbeke and were greatly reduced by wind and current. Although the westerbeke is rated as 40hp, unlike the yanmar, they are rated before that big paragon transmission that probably takes 10 of those 40hp! If I run the yanmar 56hp with its Kanzake transmission at the same rpm (2,500) as I ran the westerbeke I get 6.5 kts. and not as high a % loss with wind or current. I'm using a 18x13 three-blade prop that I could reduce the pitch and run more efficiently at a higher rpm as the yanmar is rated, but I'm close to hull speed and I like the manureability that I have by "goosing" the engine and making the stern kick about. My commercial tugboat friends say that this means the "boats got ass"! 'take care and joy, Aythya crew

fcsob · #6 (**permalink**) 10-04-2008

There was already a small skylight in the floor that also lighted the engine compartment. I would also try the compass hole first. My engine is a Ford 192d, the only one I've seen in a Morgan. Its also 55hp with a Borg Warner Velvet drive, I get 7knts @ 2200 rpm.

evasion · #7 (**permalink**) 10-13-2008

thanks for answer captain,

I think I will go for a new engine-transmission.

Estimate here in Montreal are 10 000$ to rebuilt westerbeke 4-107 and Paragon P-24 tranny.

New engine is around 13 000$

I'll check for a 56 hp Yanmar with Kanzake tranny. Did it bolt on when you did installation?

Do you think that more then 56 hp will get you more power or its not needed? If a add a high amp Balmar alternator and freezer compressor?

thanks

Irwin54 · #8 (**permalink**) 10-28-2008

I had an OI414 #141.

We had the Ford 192D that Hollman Moody marinized. Great reliable tractor engine. We replaced with a Yanmar 76 HP (long story but would most likely be better one size smaller) Speed under power was impressive swinging a large prop but remember the speed comes from increased water line (squat). Must remember to keep your stern ports closed!

Change out was done without cutting any holes.

Disassemble auxiliaries, trans, exhaust manifolds,etc/ Raise engine using halyard with thin spectra tail through binnacle. Once raised, timber up even with engine room opening, slide out into walkthrough, forward to main cabin and then up through companionway.

Went great!

marinaparaiso · #9 (**permalink**) 11-20-2008

Quote:

Originally Posted by evasion

I need to rebuilt the unit after 33 years.

My morgan as the passageway between cabins.

Is there a trick to remove it and put it back from the central cockpit without cutting the cockpit sole?

I also need best places to buy rebuilt kit for that motor and Paragon P-24-L.

thanks

Hola amigo! You can get many answers to your questions if you join in Yahoo groups, the Morgan 41 members group.
I know somebody who by himself remove the engine trought the passage way between the two cabins.
Join the group and post your answer.
Good Luck!

Manuel.