Jan K,

hi to sweden, liked your post, this sounds like very good advice but have a few questions -

you sound like you have experience with these things. i am going to ask "why" on almost all of them@! I am not being sarcastic at all, i want to learn more is all.


> Tank size is vital...240cc -300cc (8-10oz) is what you should
> use. Not bigger!

why, does the engine care how big the tank is?

> Always mount the tank so the centerline is horizontal with the
> carb needle.

agree good for fuel flow at any attitude.

> Use as short fuellines as possibly!

agree, best to reduce fluid drag in lines. what is your opinion on using an in-line fuel filter? YS practically insists on it.

> never ever reuse an old glowplug washer!
> Always put in a new washer when you change glowplug.

why is this? I am sure I may have re-used old washer and wasn't concerned, but since you stress it so much what is the reason?

possibly a bad seat / seal when the washer is compressed multiple times?

> Never use more than 15% nitro!

I have an OS46 FX and a YS45 FS. The YS recommends 20 nitro, the OS - not sure on the recommended but I think 10-20 should be an ok range.

What is your concern here, overheating of the OS at higher nitro content?

> Also check all bolts and retighten if necessary.

any leaks or compression problems may affect engine performance and idle.

> Prop is also vital...APC is what I recommend, size is up to you.

I agree, i used to use MA props, the standard ones, and then switched to all wood, wood was better but got expensive when they break, and now APC is my prop of choice - excellent prop design with minimal high-rev distortion compared to MA (not scimitar. Scimitar seems comparable to APC)


> Never use a cheap plastic spinner!

OK I use dubro spinners and no problems, what is your experience, did you have one break? I have never seen one break simply due to engine rpm.