The engine well seems to take on alot of water under power in our 74' CD25 (#76). Is this typical? Has anyone tried making some kind of a rubber diaphram of sorts to minimize this and without engine performance problems. I've read and experienced needing to keep the lazaratte hatch open under power too. Any solutions out there for this as well.
Don_Kolenda@msn.com
CD25 Engine Well Flooding
Moderator: Jim Walsh
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Jerry Hammernik
Re: CD25 Engine Well Flooding
Your flooding is possibly caused by the boat being stern heavy. 25's are prone to this. I always keep the water tank full and store as much as I can up forward. Is your battery (or batteries) located forward in the sail locker or aft next to the engine. Get the weight forward! The outboard typically has idle relief ports located just below the powerhead. The exhaust normally exists below the water, however at idle the exhaust cannot push out against the water pressure. The idle relief ports let the exhaust at idle escape above the waterline. Trouble is that's right into the motor compartment! If you tap out the idle exhaust ports you can put a flexible stainless steel sink connector on them and run the idle relief exhaust out aft. Do this and you will be able to run for hours with the hatch closed. If you need more detail drop me an E-mail. Jerry
dauntles@execpc.com
dauntles@execpc.com
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Bruce Bett
Re: CD25 Engine Well Flooding
Don:
The older Cape Dory 25's had that problem. Here's what I wrote in reply to a similar query a couple of years ago.
"My dad used to own a 1973 CD 25. I currently own a 77 model. Some significant
improvements were made in the lazarette design somewhere between those years. The old Dory
really did scoop the water! My dad had two solutions (besides keeping the water tank full). The
first was a couple of blocks of lead bullion up in the chain locker. The second was to fill the
lazarette (with two gas tanks in place) with urathane foam. This did cut down on the scooping. A
better solution would be to enlarge the lazartte hatch cover, enclose the motor well at the bottom
and build shelves for the gas tanks. This is what Cape Dory did in the later models."
After posting the above I spoke to my dad about it. He reminded me that he had also carved two little blocks out of standard construction grade 2 x 6. These fit in the bottom, around the lower end of the outboard, plugging the hole. He did not attempt to make them water tight, but just to fair off the bottom so that the outboard hole didn't scoop the water so badly.
Good Luck
Bruce
Sostenuto cd25 #496
The engine well seems to take on alot of water under power in our 74' CD25 (#76). Is this typical? Has anyone tried making some kind of a rubber diaphram of sorts to minimize this and without engine performance problems. I've read and experienced needing to keep the lazaratte hatch open under power too. Any solutions out there for this as well.
Bett@smtp.munet.edu
The older Cape Dory 25's had that problem. Here's what I wrote in reply to a similar query a couple of years ago.
"My dad used to own a 1973 CD 25. I currently own a 77 model. Some significant
improvements were made in the lazarette design somewhere between those years. The old Dory
really did scoop the water! My dad had two solutions (besides keeping the water tank full). The
first was a couple of blocks of lead bullion up in the chain locker. The second was to fill the
lazarette (with two gas tanks in place) with urathane foam. This did cut down on the scooping. A
better solution would be to enlarge the lazartte hatch cover, enclose the motor well at the bottom
and build shelves for the gas tanks. This is what Cape Dory did in the later models."
After posting the above I spoke to my dad about it. He reminded me that he had also carved two little blocks out of standard construction grade 2 x 6. These fit in the bottom, around the lower end of the outboard, plugging the hole. He did not attempt to make them water tight, but just to fair off the bottom so that the outboard hole didn't scoop the water so badly.
Good Luck
Bruce
Sostenuto cd25 #496
The engine well seems to take on alot of water under power in our 74' CD25 (#76). Is this typical? Has anyone tried making some kind of a rubber diaphram of sorts to minimize this and without engine performance problems. I've read and experienced needing to keep the lazaratte hatch open under power too. Any solutions out there for this as well.
Bett@smtp.munet.edu
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Donna Delahanty
Re: CD25 Engine Well Flooding
As far as solutions for the lazaratte hatch open under power, I installed a small adapter to my 9.9 Evinrude where the exhaust came out. To this adapter, I hooked up a piece of flexible tubing that ran down the shaft into the water. The tubing was held in place with plastic cord tied around the shaft. This worked like a charm. The tubing passed the exhaust out behind the boat instead of in the motor well. I did find that I still had to leave the lazarette open while in reverse as the boat would back up over the exhaust. I installed this over thirteen years ago and have never had to replace it. And because it has been so long ago, I can't remember where I got it or what it was called. I'll check around and see what I can come up with.Don Kolenda wrote: The engine well seems to take on alot of water under power in our 74' CD25 (#76). Is this typical? Has anyone tried making some kind of a rubber diaphram of sorts to minimize this and without engine performance problems. I've read and experienced needing to keep the lazaratte hatch open under power too. Any solutions out there for this as well.
Donna Delahanty
Windsong CD25 #808
Oh, by the way, I just sold Winsong and want to wish her new owners well and hope Windsong brings them as much happiness has she has brought me over the last 14 years. Windsong has sailed to all five great lakes and lived on Lake Erie in Port Clinton, Ohio. Her new home will be Lake Michigan in Milwaukee.
maxg@fuse.net