7.5 beltstart outboard conversions

[waltr]

James,

I have the rubber boot on it already,just need the inserts.

Thanks!

Paul,

the other one I have I just pulled out and it's not an Irwin.

It's a home made one with the same idea as Jims but unfortunatly not the quality.

I never ran it,I run the one from Ernie.

But i'll post a few pics to see when the camera battery re-charges.

 

[XtremeRcBoats]

James,I have the rubber boot on it already,just need the inserts.

Thanks!

Paul,

the other one I have I just pulled out and it's not an Irwin.

It's a home made one with the same idea as Jims but unfortunatly not the quality.

I never ran it,I run the one from Ernie.

But i'll post a few pics to see when the camera battery re-charges.

Walt, looking forward to the pics. always good to see other setups.

 

[waltr]

Hi Paul,

here are a couple of pics of the other bracket I put in my Gallery late last night:

https://www.intlwaters.com/gallery/displayimage...10208&pos=0

https://www.intlwaters.com/gallery/displayimage...10208&pos=1

Actually don't know anything about this unit and I never ran it.It's just a simple idea if it works.

The blanks could be laser cut for about $2-$3 folded on a brake and the blocks tapped and you're done.

 

[waltr]

Showed an error and posted anyway.

Sorry for the dbl post.

 

[drumzzzzz]

Hey James,I'd like to try one of your bell mouth pieces for the CMB.

Actually,I'd like to get 3 from you.My buddy also has the same set up and of course,ya always need an extra.

LMK the cost and I'll pay-pal ya.

Also the props arrived here yesterday.I can't wait to give them a try.

Paul,

I have another adapter I'll have to dig out that I believe Jim Irwin did.It's another approach all together.It might be a little more user friendly when it comes to belt starting.

I'll post a few pics when I get home.

Walt,

is this the the one in the RCboatmodeler? Recently got a scan from a friend of mine: page 1

page 2 page 3

Works good?

(Drumzzz this is the artcle i think you where looking for).

Yes, that's the one

thanks

man those engines certainly look sweet sitting on those outdrives

 

[XtremeRcBoats]

James,

got the carb tube, arrived yesterday in the mail. That was quick! Thanks.

See picture in my gallery: here

 

[topfuel443]

Hey Paul, looks cool! You got the bell mouth too right? Didnt see it in the picture, and now I cant remember if I put it in the envelope!

Where did you get the square drive nut?

~James

 

[waltr]

Paul,

I was thinking that I'll probably never use the bent flat motor bracket that I posted pics of in my gallery.I've had it for years and never ran it.

So,if you would like to try it until something better comes along, you're welcome to it.

I can sand blast it for you so it looks much better also.

If I can help,just let me know.

 

[XtremeRcBoats]

Paul,I was thinking that I'll probably never use the bent flat motor bracket that I posted pics of in my gallery.I've had it for years and never ran it.

So,if you would like to try it until something better comes along, you're welcome to it.

I can sand blast it for you so it looks much better also.

If I can help,just let me know.

James, yes the Bellmouth was also with it, put it on after the photo (i'll take a new shot, here it is ). The square drive coupling i built my self. There was a round coupling with it. I shortend it and inserted a part of the shaft from an old k&b propshaft (the sqaure piece).

Walt, thanks for the offer. I got me thinking, the bracket is a neat and simple setup, you just have to make a big U. I'll think i'll give it a try with carbon fibre, that should not be so difficult to construct. Tomorrow I'll see if i can built a mould for it. I'll keep you posted.

 

[XtremeRcBoats]

Finally got the it ready. Took some more time than i hoped for but like the result.

I started bulding the mold, that was not so hard: pic1

the result came out nice pic2

Also modified the lower unit, removed the extra bulb, added a 707cavitation plate, polished and sharpend the lower part: pic3 pic4 pic5

This is the result pic6. Don't know yet when i'll test it, first have to rebuilt the xt460, i'm working on a new rc box and want to paint it before i run it.

Question, what is a good header length for the CMB, how many inches from the plug to the widest part of the pipe (currently it is way to long). Curently i have a SPP pipe on it but probably first start with an Irwin Quiet pipe.

 

[norm j]

hey paul what version do they call your cmb engine?

norm

fmbc

 

[XtremeRcBoats]

hey paul what version do they call your cmb engine?norm

fmbc

Norm, this is an CMB Evo1.