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my sirio doesn't seem right.....

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MEGA MAXX

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hi all.

well I've FINALLY got my used (1/2 gallon of 10% through it) sirio .18tx through the post and it doesn't seem right.

when i turn the flywheel, as it hits tdc it doesn't sorta go over it (if you get me?). it just like goes into a position like in the middle:ponder2: of tdc?

now it might be because its got no fuel in. I'm going to attempt running it tomorrow but i just wanted to if any of you R/C Headz could help me out.

thanks

Alex

p.s is it ok to run the engine with no clutch shoes on (but with a fly wheel) and in a vice?
 
not totaly sure if i understand but if you feel resistance & a pop at tdc i think its good

NO do not run your engine without being in the car,... or for the advanced rc'er a prop conected to the engine ...it needs to have resistance





MEGA MAXX said:
hi all.

well I've FINALLY got my used (1/2 gallon of 10% through it) sirio .18tx through the post and it doesn't seem right.

when i turn the flywheel, as it hits tdc it doesn't sorta go over it (if you get me?). it just like goes into a position like in the middle:ponder2: of tdc?

now it might be because its got no fuel in. I'm going to attempt running it tomorrow but i just wanted to if any of you R/C Headz could help me out.

thanks

Alex

p.s is it ok to run the engine with no clutch shoes on (but with a fly wheel) and in a vice?
Click to expand...
 
ugh, ok i wont run it in the vice. (it will be such alot of haslle having to take all the clutch shoes and everything off my old engine:angry:)

well, it just like locks into position and is like trying to move the piston down either way i turn it.

it goes; bump,bump, pop.
 
If you look around ebay they have Break in engine stands. But do not run your engine unless on a stand made for that purpose or mounted in your car.
 
jon2 said:
If you look around ebay they have Break in engine stands. But do not run your engine unless on a stand made for that purpose or mounted in your car.
Click to expand...

do i still need to fit the clutch shoes to it?

I'm not going to rev it i just want to see if it runs.
 
hmm siro iv had allmost every one of my siro's do this at one time or nother..

siro is a hit and miss motor you may get a bad one you may get a good one..

go with os. much eayser to get parts.. and runs beter and 2 year warnty.
 
Well pretty new high performance engines are VERY VERY tight and will offer a BIG deal of resistance when reaching the top end of the piston travel when turned manually.I put a bit of after run oil and turn them over,just to check.Just have this habit.

When I first got my Mega for my Serpent 710 is said damn this engine will need preheating before any startup.And other engines like the HPI MT2 18SS engine feels...lose in comparison.

:2cents:
 
On some of my tighter motors a little secondary resistance is felt just before the "pop". Maybe that is what you are experiencing. If it runs right, why worry?
 
Mega, I have no experience with the Sirio mill personally, but my Wasp .28 did that exact same thing, so I know what you are referring to. I think you're good to go!

Good luck!
 

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