18ft phantom

[speedygirlie]

Hi Guys and Girls

Need to pick your brains, Got 18ft phantom had transom beefed up to 4" wide 28" high I am putting my 225 yam on the back, is the transom too high for my 24" chopper prop, as the four bolts that hold the engine on are in the well, will it make any difference? I have also got an extra water pick up on the gearbox that works well. and the water pick up is on the boat.

regards speedygirlie

[driver510]

too high needs to be about 25-26 inch high on transom. phantom boatsr like the torpedo to run about 1.5 inch below boat hope this helps

[larby]

Would having a big 225 yam that high up on a P18 not cause stability issues? What is the length of the leg on your yam?

James

[speedygirlie]

Cheers for the info guys,

its a standard leg on the yam James

Speedygirlie

[willwood6]

We run our 18's with the bullet of the box almost level with the transom. Most the people on this site won't agree with that but after trying every position on a hydraulic jack that gave best lap times.
24 chopper will run fine as that is what i use for racing.
Don't go any higher though as you'll be able to slide the back of the boat which is pretty good fun but not ideal if racing.
My expeience is all with a transom jack so if your mounting direct to the boat you may need to go a bit lower than the V to get good water pressure.

Hope this has helped some.
Will

[larby]

Originally Posted by speedygirlie

Hi Guys and Girls
transom beefed up to 4" wide 28" high

Originally Posted by speedygirlie

Cheers for the info guys,

its a standard leg on the yam James

Cool, well IIRC, the length from the top of my saddle to the bullet of my gearbox is 29" (mine are std shaft too). On a 28" transom that will leave you with the bullet an inch below - about perfect if the engine is bolted to the transom
I could be wrong, but i seem to remember a good guide being that for every 6" you go back with a standoff bracket or lifter, come up an inch, which would tally with willwood's findings too.
Chopper prop will be just fine at this height, and is said to be a good prop for a phantom (i wouldn't know, i've never owned one )
As for it being ok for all 4 bolts being in the well, that's all down to how good the transom strengthening is. I would expect there to be knees glassed in to give the top of the transom some more support? Other people on here know waaaaay more than me about that kinda thing!
On a seperate note, I'd double bolt the saddle to the boat, I've heard plenty of stories about the saddles snapping on yams, mine have various plates welded to them for strength!

I'll stop rambling now!

James

[speedygirlie]

Hi James

Thank you so much for the information, it does help ALOT !!

Regards

Speedygirlie

[larby]

Glad to be of assistance, it's all one big learning curve for all of us!

James

[speedygirlie]

Hi Will

Thank you so much for your information, every little helps!!

I think we have got it sorted now, Ste Hutch said the same as you.

Regards Speedygirlie