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Old 23 June 2014, 14:56   #11
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Country: USA
Town: odessa
Boat name: Zelda 3
Make: avon
Length: 4m +
Engine: 9.9 merc 4 stroke
Join Date: Jun 2014
Posts: 8
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Originally Posted by Landlockedpirate View Post
Sorry, should have said, I mounted one upside down. I didnt realise you had a tiller engine, you may need to make some further modifications.
Spoke with a lot of people in the business and decided to go ahead and take off 3 inches. Came out fantastic! Still plenty of transom for safety and the motor sits right where it should in the water. Nothing left but to apply some solar seal (rubber caulk) hear and there. Need fiberglass and rubber black paint to dry completely. Even in rough seas I will be fine now. 20140623_144000.jpg20140623_143811.jpg20140623_143800.jpg
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Old 23 June 2014, 15:38   #12
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Country: Other
Town: Caribbean
Boat name: Rib
Make: Avon
Length: under 3m
Engine: 2.5 Tahatsu outboard
Join Date: Jun 2014
Posts: 106
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Originally Posted by cwoakes View Post
I have a 1992 avon R4.00 supersport. i would like to cutdown the transom a few inches to use a brand new merc. 9.9 thumper short shaft. My question is: what is inside the transom? Do not want to start cutting if it is just stringers and foam with a glass layer. I am hoping it is solid wood. Any help greatly appreciated!
Sell the short shaft and buy a long shaft. I think they are like 15" and 20" i.e. 5" difference.

The line of the base of the transom should roughly line up with the cavitation plate.

This way you have a good engine and a perfect transom. A cut down transom would devalue the RIB significantly when you want to sell it, plus lowering the freeboard is not a good idea.

Oops, Now realise that you have already cut it. Good luck with it.
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Old 23 June 2014, 15:41   #13
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Country: UK - England
Town: St Helens
Boat name: Wine Down
Make: Maxum
Length: 8m +
Engine: Inboard
Join Date: Apr 2012
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Quote:
Originally Posted by Doug_G View Post
Sell the short shaft and buy a long shaft. I think they are like 15" and 20" i.e. 5" difference.

The line of the base of the transom should roughly line up with the cavitation plate.

This way you have a good engine and a perfect transom. A cut down transom would devalue the RIB significantly when you want to sell it, plus lowering the freeboard is not a good idea.

Good advice, but it looks like he has already got the jigsaw out

At least it looks like a neat job.
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Old 23 June 2014, 16:20   #14
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Country: USA
Town: odessa
Boat name: Zelda 3
Make: avon
Length: 4m +
Engine: 9.9 merc 4 stroke
Join Date: Jun 2014
Posts: 8
Quote:
Originally Posted by Doug_G View Post
Sell the short shaft and buy a long shaft. I think they are like 15" and 20" i.e. 5" difference.

The line of the base of the transom should roughly line up with the cavitation plate.

This way you have a good engine and a perfect transom. A cut down transom would devalue the RIB significantly when you want to sell it, plus lowering the freeboard is not a good idea.

Oops, Now realise that you have already cut it. Good luck with it.
I hear what your saying, The value is irrelevant, I paid $600.00 for the boat. As for the freeboard it was reduced minimally, and lets remember it is an inflatable. Years ago I got caught in a hellacious storm and fearing the boat would just flip over in the high winds and waves , I sat in the bottom, kept the motor running and pulled the plug filling the boat half full of seawater. I easily bobbed up and down dragging my anchor line and never feared of sinking. I love Avons and the fact they are indistructible.( the older ones, do not know much about the newer ones). I appreciate your insights, in a perfect world I would own a long shaft, but it is what it is. Had I hacked off 7-8 inches of the transom, I would be worried, thre inches is not a deal breaker. Beats the hell out of a 600.00 extension on the motor or a half-ass jack plate rig. Happy boating, lobster season is just around the corner!!!!!!!
BTW this is a photo of my vintage Avon I have been using for at least 10 years, just can't kill em! lol
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Old 25 June 2014, 14:57   #15
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Country: USA
Town: odessa
Boat name: Zelda 3
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Length: 4m +
Engine: 9.9 merc 4 stroke
Join Date: Jun 2014
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Took it out on a test run for the first time. Popped right up on a plane even though it is underpowered, tried to flood the transom, couldn't do it, still has 17 inches of freeboard! Handles fantastic, Scallop season in a few weeks and then lobster season in August. Perfect timing!
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