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COX snap starter spring with cam

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COX snap starter spring with cam

Post  balogh on Fri Aug 28, 2015 1:21 pm

I am wondering if someone knows in which year the COX snap starter spring with the cam (and not the conventional no-drag spring without the cam) went into production?

I browsed the net and checked the COX Model Engine Handbook of Dan Sitter but could not find the exact information. A similar rewind starter produced between 1971-1973 is shown in the handbook, whose production was stopped because Wen Mac filed a patent infringment claim against COX.

I assume the snap starter with the present cam design could go later into production, after the Wen Mac patent expited.

I am trying to determine the age of one of my proiduct engines that features the older, stepped cylinder and the snap starter with cam.

Thank you.
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Re: COX snap starter spring with cam

Post  Cox International on Mon Aug 31, 2015 10:59 pm

Andras,

Although unsure of the first date of implementation, we have Cox engines from the late 70's that have this type of starter spring.

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Re: COX snap starter spring with cam

Post  balogh on Mon Aug 31, 2015 11:05 pm

Thanks Bernie,

I also checked some older catalogues and fliers of COX products and found the starter with CAM on older stuff. I thought it only dates back to Estes times.
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Re: COX snap starter spring with cam

Post  crankbndr on Tue Sep 01, 2015 9:12 am

There were two types of cam starters, the newer one used a hex prop drive. The springs are different dia. as well. The first cataloge I can find the red one is 1985 Cox Product Cat.
PDF in the instruction sheets in this site. It shows them on engines and models.




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Re: COX snap starter spring with cam

Post  KariFS on Tue Sep 01, 2015 10:31 am

I bought my first Babe Bee in 1983 or very early 84, it has the red cam plate. Could bee that my bee had sat on the shelf for a while.

That 1985 catalog also shows metal backplates on all the tanked engines, I thought they were already plastic by then?
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Re: COX snap starter spring with cam

Post  TDbandit on Tue Sep 01, 2015 11:01 am

I agree with Bernie, I think they came out in the late 70's because if I remember correctly (maybe wrong since I was around 10 back then) my first PT-19 that I got as a kid in 1980 had the red (small hole) "snap starter" as Cox called it I had gotten it for Christmas which meant that it was bought during the 79 Christmas season. There is also a left hand version of the snap starter too.
Another thing, it's easy to retrofit the snapstarter on to older engines so it's possible that the starter was added.
(Bandit)
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Re: COX snap starter spring with cam

Post  roddie on Sun Jul 02, 2017 3:45 pm

I'm glad I found this thread.. because I have both cam-styles in their OEM packaging. Both of mine are left-hand.. and they're both listed as CAT# 334.. I bought them from an old hobby shop that was closing its door a couple years ago.



The one shown on the left fits the round drive-plate (non-hex..) and has PT-19 old # handwritten on the price-sticker.

All of my left-hand cam-style units have "black" plastic cams. My right-hand cams are all grey-plastic.

I only have three Bee cases with hex drive-plates. One came on the engine in my 1987 PT-19, and one on my 1986 Cosmic Wind. Those years are listed at the bottom of the original instruction-sheets.. and list the company as "Cox Hobbies, Inc. 1525 East Warner Avenue, Santa Ana, California 92705. The third is a crankcase that I bought singly in 2012 from a company called "Mini-Glow Planes" in Tyler, TX. (just a bit of chronology)

Dave (TDBandit) mentioned his early (late 1970's) PT-19 having the "small-hole" (non-hex) type. It was likely a left-hand unit.. but I'm not sure about that. I thought that all the PT-19's used 6 x 2 L/H props.. but I could be mistaken. The first PT-19's had Babe Bee engines.. and were later re-designed to use the modular product-engine. I'm curious whether it utilized the "postage-stamp" backplate before the final horseshoe-style?

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