Swapping from an OS to a YS engine, do i need anything?

[StreetDragster]

Hi All,

On my Srimok, you had different starter shafts for os and ys engines, and i think the vibe had an additional washer for a YS engine.

With the Trex, aside from the engine and silencer, is there anything else i need to swap over?

(OS50 Hyper to YS56SR Incase it matter)

Thanks

Matt

[StreetDragster]

Bump? The OS seems a little longer than the YS?

[Ross Northcott]

Swapping from an OS to a YS engine, do i need anything?

A miracle
ys are a major pain in the ass imo, but goos luck with yours.

[Eckchaz]

Swapping from an OS to a YS engine, do i need anything?

A miracle
ys are a major pain in the ass imo, but goos luck with yours.

There you go.. just get a 55

[shikari_chaos]

It's ok YS some of us love you and firmly believe OS=Overpriced Spares

[dumb thumb it]

hi

i had os 50s and 55s got fed up with bearings going all the time and spairs prices to, now using ys and much better all round mine rip and
never miss a beat all in all top motor i wish i had started using them sooner.

alec

[shikari_chaos]

Wahoo go alec and his YS!
erm whoops what i meant to say is StreetDragster there shouldn't be a need for any other bits and pieces just switch over the fan and clutch assembly + engine mount ensuring good "alignment"

Yes Yes YS O Yes YS SO SO NO OS NO WoW! well they're alright i suppose ...

[StreetDragster]

So just to confirm

With the YS engine, despite being slightly longer, i use the same engine mount, clutch, washers and stack arrangement as the OS, and the clutch bell has enough clearance to take the clutch shoe, despite the engines slightly different sizes?

Thanks

Matt

[tonystevens]

Id get yourself a fuel magnet aswell if your going YS
And you'll need a T-peice in your fuel line between the check valve and tank to release the tank pressure after a flight.

[StreetDragster]

Just to close this thread off, the conversion has now been completed.

Going to a YS56 from an OS50 hyper is relatively straight forward, the physical bolt up arrangement is the same between the two engines.

The fan shroud needs trimming to clear the enormous carb on the YS56 compared to the OS50, not much, just the flange on the inside radius, near the carb.

I didn't bother with a t-piece or anything in the pressure line, i just seperated the pipe after the one way valve thing to vent the tank during fueling.

Thanks

Matt