nitro bry

I recently brought a 43cc engine
It has electric start and a clutch.

My question is
The clutch bell you see in the picture fitted to the engine would it be ok to use like that or would it be better use the black clutch bell in the picture.

Kev_B

I'd say no clutch at all Bry, unless you're going to water-cool it, as it is now it'll need a constant airflow past it to keep it cool. [:-]

Kev.

jacob711

it would be better to use something like the black one because the one on the engine is a reduction gearbox, but they both will need to be modified to run a flex shaft

nitro bry

Ive been thinking about water cooling

My project is big and will be heavy so i want to be able to place it on the water and use the clutch with the electric start.

With the water cooling if i wrap flexi brake pipe around the cylinder between the fins would this be enough to help keep it cool, the only problem with this is i might not be able to use the plastic casings.

martno1fan

Hey Bri thats very similar to my mates motor he just removed the gearbox and ran it, his was 50 cc though,dont bother water cooling it unless you are running under a hatch? leave the cowling on as this helps direct airflow to it as does the flywheel.hje ran it in a 72" hull and got close to 50 mph with it with a cannister no tuned pipe.
Mart

nitro bry

Hi Mart

I was considering making a hatch because i will be installing the battery and electrics for the electric start.

Imight do that with the gear box

How did your mate fit the motor in, do you have more pictures.

martno1fan

If you look at those pics you can just make out where he mounted it using ali angle id also make sure you use rubber dampers which im sure you allready know [)].Heres a vid of his boat testing props,he needs a bigger pond [X(].
[link]http://www.youtube.com/watch?v=i9YV_8hBQ[/link]

nitro bry

I tried the link but it says

The URL contained a malformed video ID

nitro bry

got it
I opened you tube and copy & pasted (watch?v=i9YV_8hBQ) in the search bar

Do you know what size prop did he used

martno1fan

He was using a 470 which i told him was no good been too small so i recomended the x482 which gave him over 15 mph increase in speed.He clocked it on his gps at just under 50 mph on its first run with the bigger prop.Hes in Switzerland but we chat a lot about boats although hes working away in Itally for a few weeks at the min or id ask him for some more pics for you.
Mart

nitro bry

Cheers mate