Needle For Product Engine Help

NEW222 Tue Dec 22, 2015 5:33 pm

Hi there. I have just come into what I believe is another product engine with a black horseshoe backplate. The only problem is that there was no needle included with it. So, which needle would I need for it? These two look the same except for length. The difference is $1 in price. Thank you.

http://coxengines.ca/cox-.049-needle-valve-brass-short.html

http://coxengines.ca/cox-.049-needle-valve-brass-long.html

Marleysky Tue Dec 22, 2015 6:05 pm

Which needle? How close to the prop do you want your fingers or knuckle?? Longer needles give you a little extra to grip, but may also vibrate loose, so I have read. I think as long as both needles have the same "threads per inch" either will work.

jsesere Tue Dec 22, 2015 7:00 pm

PM me with a picture and I'll send you out one.
Joe the Parts Hoarder

happydad Tue Dec 22, 2015 7:05 pm

jsesere wrote:PM me with a picture and I'll send you out one.
Joe the Parts Hoarder

You can also use the "Killer Bee" needle. They all have the same thread, but the KB needle has a plastic extention to reduce vibration, but cost + $2.
Use the long one. Some one sells them on ebay for less than $1 each when you buy 10 pieces.

Happydad RC Plane