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Old 18-01-2008, 09:04   #1
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CSY engine size....


I have recently brought a CSY 44 in a very delapadated condition and have to find a new engine. I have a completley dead Perkins 4-236 in at the moment and am contemplating a new engine - my question is, whats the perfect HP, Perkins offer a 65 or 90. I also have to consider prop and gear box. I have a maxprop but shaft and stuffing box need to be replaced... any help would be much appreciated, as you can probably tell although my background is with boats, it is not yachts and restoration!

Many thanks for any assistance,

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Old 18-01-2008, 10:05   #2
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I would think that the 65 hp motor is plenty for your CSY 44. I have a CL41 with a 50hp and she does just fine. Contact Never Monday on this board, he is a very good resource.

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Old 18-01-2008, 10:08   #3
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Welcome aboard!

If you do replace your motor you'll want to try to match up the horse power, RPM, torque ratings and gear box rating w/same ratios as much as possible. Otherwise you'll need to change the prop spec's as well.

Not being an experienced boater, what possessed you to get a fixer-upper?

One thing though, you will learn the boat digging this deep into it.
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Old 18-01-2008, 12:17   #4
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We looked hard at a CSY 44 Walk-Through that had been repowered with a 75HP Yanmar. As I recall the old Perkins units were rated optimistically and actually put far less than advertised HP into the water.

For me - I'd opt for the bigger unit. CSYs are quite heavy and I'd hate to regret no going large enough during a repower.

My $0.02...

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Old 18-01-2008, 12:28   #5
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How is your engine completely dead? It takes a lot to kill a deisel engine...
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Old 18-01-2008, 13:53   #6
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Deere not Dear

In your position I opted for a John Deere 4045D. 75hp continuous from 4.5 litres at 2500 rpm driving through a 2:1 ZF63 box.

Support from the local rep. was good enough to allow me to install the engine myself.

The cost was a few boat bucks more than the Yanmar or Volvo. Any John Deere dealer can order parts for you and they are worldwide.

The power curve on the Jon Deere looked similar to the Ford 2042E that it replaced but I will have to get the propeller repitched. Ended up about 4" too coarse.

More info in my blog and other posts.
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Old 18-01-2008, 14:48   #7
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Is there a reason you wish to repower with a Perkins?
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Old 18-01-2008, 19:48   #8
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Moving 22 tons through the water requires more than 75 hp. 90 to 100 hp is more inline with necessary power.

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Old 18-01-2008, 19:58   #9
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