I am going to purchase the OS 37-SZ-H And it does not ship with a muffler. Question is, should one use the stock OS32 muffler which i have heard decreases power of the 37 or get something else. Hatori? etc.. If so, which one? thanks.

I don't think the stock muffler has enough expansion for that motor, besides robbing power I have heard it makes it run hot. I'd try a Hatori but I'm not sure of the model number.

Call Ricks, http://www.ronlund.com and ask for Nathan. One of the best in the business and will go way out of his way to help you out.

Good luck.
Andy

Thanks, i will. just noticed we are neighbors.

anyone know which hatori will work best with this engine and heli?

Yep! Where do you fly? I can usually be found at Lannie or Green Cove.

My current heli project is a Jet Ranger with JSO's paint scheme. I was out there a few weeks ago at Craig shooting pictures.

Andy

I learned to fly at Lannie. Havent been there for quite some time. I beleive i found a hatori muffler for the OS 37. Anyone know if it will fit or if a spacer is needed?
http://www.ronlund.com/Merchant2/mer...ode=HATMSAB6RS