26' Webber's Cove Full Keel Build

c1steve

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So what is top speed? 3+ mpg at 22 knots seems too good to be true. Impressive if those numbers are accurate. I’m thinking a 29’ Webbers with a 315hp John Deere would be a great combo.
What about the 29 with a 6.7 Cummins? Is the installed height about the same, JD and Cummins? Either engine would add 600 lbs. over a small Yanmar, but the larger displacement and slower speed usually provides a more efficient fuel burn.

Searching online, it appears that a 22" prop can be installed in the 29' model. That would work well with a 340+ hp engine.
 
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CaptJ

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Nov 27, 2011
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Cranberry Isles, ME
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Josh
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H and H 34' passenger ferry; Webber's Cove 26
I have a 225 hp 4 cylinder John Deere with a 19” propeller on a 26’. I get more like 2 mpg. 15 knots is about 7 gallons per hour. It is a light boat also with just a v-berth up forward.
 

BillD

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Portsmouth NH.. Piscataqua and Merrimack Rivers
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27 H&H with Cummins QSB 5.9 480 power

RonnyB

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Ron
beautiful boat...quite the project and quite the trip ! Congratulations
Back to the mechanicals on your build.....?
Curious if Yanmar checked off as "OK" on the Yanmar install?
Has the spillover height of the turbo been established in relation to the hull waterline?
You certainly do not want the new Yammie to be drinking water internally o_O
Very nice project !
Zac from Mack Boring signed off on John’s install during the Sea Trial above. The new Yanmie ran sweet as a song! The wheel house deck is 3 inches above the top of the engine and the cockpit deck 5 inches below that.
 

c1steve

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Try to stuff as much quality sound deadening material you can, onto the underside of the cabin sole. 2" would be okay, but 3" would be better. If you had to raise the cabin sole 2", it would be worth it.
 

c1steve

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I have a 225 hp 4 cylinder John Deere with a 19” propeller on a 26’. I get more like 2 mpg. 15 knots is about 7 gallons per hour. It is a light boat also with just a v-berth up forward.
That is so different from what owners of AJ28's get, almost half. I wonder where the difference is. Displacement, prop aperture shape, modern vs mechanical engine?
 

PatriciaLynn

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Jul 18, 2017
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Cape E
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Repco
That is so different from what owners of AJ28's get, almost half. I wonder where the difference is. Displacement, prop aperture shape, modern vs mechanical engine?
I have noticed the website #'s are really goid, almost too good to be true. Has anyone confirmed those #'s in the real world?
 

c1steve

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I have noticed the website #'s are really goid, almost too good to be true. Has anyone confirmed those #'s in the real world?
"28 aj opinions
I had one before my 36 NB. It had the 260 yanmar. Great boat, great fit and finish, could have used some more hp in my opinion. It didn't lack power until I went for a ride on TIGERSPUD. That 28 AJ has the 370 yanmar and it is an animal!! It was great on fuel with the 260. At 3000 rpm it did 19 kts at 5 gph."

Also posted:
"Here's a pretty close approximation

Diesel - 5.3 gallons per hour per 100 hp
Gasoline - 7.8 gallons per hour per 100 hp"
 
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JWS

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Jul 25, 2022
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"28 aj opinions
I had one before my 36 NB. It had the 260 yanmar. Great boat, great fit and finish, could have used some more hp in my opinion. It didn't lack power until I went for a ride on TIGERSPUD. That 28 AJ has the 370 yanmar and it is an animal!! It was great on fuel with the 260. At 3000 rpm it did 19 kts at 5 gph."

Also posted:
"Here's a pretty close approximation

Diesel - 5.3 gallons per hour per 100 hp
Gasoline - 7.8 gallons per hour per 100 hp"

"Don't believe everything you read on the internet" -Abe Lincoln
 

RonnyB

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Ron
Below the sole update! I installed the "ribs" for the decks to mount the 60 gallon water tank, water heater and pressure pump, 43 gallon waste tank, macerator and 2 batteries and charger. I also installed the "ribs" for the cabin deck. Slip sliding around in the bow is a pain the ass! I added 2 inch conduit for the system runs fore and aft. The 128 gallon aluminum diesel tank is being welded up for an install next week. I made a hatch gutter, aka splash well, mold and formed up the first of many splash wells for the numerous flush deck hatches. John's Marine Care has been super helpful with advice for this amateur Downeast boat builder!

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Full Circle

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May 24, 2017
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Vero Beach, FL
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Campbell Custom Atlantic 37

RonnyB

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Ron
Congratulations! Great choice. I’m a big Yanmar fan and have owned several. If I purchased a new one I’d take the time to inspect the paint job, particularly the small oil tubes. When they spray them they offen don’t paint, or can’t reach the back sides so they rust. I’ve had several rust thru and cause leaks. I’d take the time to take the time to take them off and repaint them if that were the case. Otherwise, they’re bullet proof as I’m sure you know. Best of luck for years of boating enjoyment!
Paul
Thanks Paul for the advice on the Yanmar oil tubes. I love this forum for first hand info based on real experience!
 

Gdemos

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Gregory
Curious how the bow/stern thrusters were done-appreciate any details you have
 


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