Advice Please on Avon R340 Transom Height

[BigDuke6]

Hello All,

New member here, hoping some of the old hands can cast an eye.

I have very recently bought an old Avon R3-40. I have a Mariner 6HP Long Shaft (from my other, larger boat). So, unsurprisingly my query is about the height of the transom.

I have had a bit of a nose about prior to posting, and have read the informative link below.

http://www.rib.net/forum/f50/abc-sib...nes-58373.html

Also I have had a look at the very specific thread below, which seems to feature an Avon similar to mine. Which shows a very effective raising of the the transom by phillnjack.

http://www.rib.net/forum/f50/raising...ght-32524.html

I have also attached images of my boat, with a makeshift set up and from what I can very roughly judge, my transom is more or less the same height currently, as shown in the modified transom link of phillnjack's above.

I would be most grateful if the experienced members of the forum could have a look at the images below and give me their thoughts on the if the current height of my transom, is fit for purpose?

All help much appreciated.

[Landlockedpirate]

You have a short shaft transom (15") and a long shaft engine (20")

While it will push the boat along (Assuming it starts with the increased back pressure on the exhaust), its not ideal.

The extra drag will probably stop any chance of you getting the boat on the plane.

[Max...]

As he said - it will 'move' the boat but will it be right? Nope!

[BigDuke6]

Thanks for your input Gents.

How much higher should I be looking to raise the transom? About 3" The same height again as the steel outboard plate that is there already?

[Xk59D]

had similar thing not long ago, the only way to do that correctly is get a different engine.

you would need to raise the engine 5" from where it is now, it will literally be in mid-air.

you will never plane with that engine anyway, so i'd just live with it as i assume it is to potter around.

cheers

[BigDuke6]

Thanks for that.

If it's possible to potter with the current set up, I'll probably go with that, it's only 6hp.

For now it's just about getting out on the water for a bit, before the summer(ish) time passes.