jackshaft and dog clutch

[sir john]

I have a 4hp Honda with a centrifugal clutch to a 16mm diameter jackshaft question is will this bend ?do I need a 19mm shaft?
Also on first start up the engine likes to rev its **** off is there a simple way to disengage the drive for a minute to warm it up? I am thinking about maybe a v belt and pulley from the jackshaft to axle and a idler wheel clutch?
What do you reckon dudes ???
Its a push trailer btw see my other thread

 

[5-7HEAVEN]

Maybe you can disconnect the fast idle choke and/or lower the idle.

 

[sir john]

Cheers dude but I can't make the little bigger start without it
I have decided to go for pulley and belt drive from jackshaft to axle and use an idler tensioner to disconnec the drive. cast iron pulleys and taperlocks to the shafts

 

[IbedaYank]

make a stand so the wheel does not touch the ground for warm up

 

[HeadSmess]

16mm or 19mm shaft...thats dependent on where the bearings are located. up close, both sides...16 is fine. its all on how well things are supported.

not too sure how i feel about 16mm taperlocks but... a key is a lot more solid. maybe you can insert a sheer pin between pulleys, if the shaft is set up in such a way? im assuming your driving from one pulley to the other via the 16mm shaft. if pulleys are side by side with nothing in between...id bolt/ pin them together, take the torque load off the shaft.

you already got the clutch sorted, as a later alternative id suggest something like the cone clutch from a vintage reel mower... set it up so its always engaged, just stand on the lever/ lock it off for starting... centrifugal takes over once warm? ja?


a different carb without the hi speed choke?

anyways...

be careful spinning (cheap) cast iron pulleys too fast!