Fox .35 ID

If it's a Stunt 35, it will be on that page. MFD beat me to it.
Rusty

http://www.clstunt.com/htdocs/dc/dcboard.php?az=show_topic&forum=103&topic_id=323889&mesg_id=323889&listing_type=search

Thanks guys!

To be precise, the engine is either the 1972 or the 1973 Fox 35.

It is hard to tell from the photographs but if it is of the 1973 variety then the exhaust stack and associated bosses will have been machined (faced off) so that they are flush with the cylinder fins.

While those pictures depict what appears to be that year engine, I think it's incorrect. For starters, Jim has the wide bypass Fox.35. I don't believe the 1973 shared the wide bypass case. The pictures shown here don't reveal the other side of the engine. Seeing I got rid of all of my non eared Fox's for muffler lugged versions I have none to compare.  In addition, the determining factor on Jim's engine is the raised .35 logo casted  on the bypass. I don't believe the 1970's engines had a raised logo and the 70's  were the start of the shiny case Fox .35's with the words "Fox" only on the bypass. I would say Jim's engine is older. Ken

The 1970 Fox 35 was the first appearance of the silencer mounting bosses - except they were undrilled.

The raised FOX over 35 logo appeared in 1958.

1959 (10th Anniversary Model) - same as 1958 engine but has a sticker under the logo "1949", "FOX", "Anniversary Model 35", "1959"

1963 |(15th Anniversary Model) - same as 1958 engine, no sticker but gold plated later changed to bright finish. Black washers and plated screws.

1968. Like 1958 except divider appears in exhaust. Circlips retain gudgeon pin. Dull cast finish.

1970. Like 1968 but with undrilled mounting bosses. Liner ports shortened. Tapered flat on needle.

1972. Like 1970. Drilled and tapped silencer mounts. Shiny case. Blackened steel hardware. Exhaust port in liner machined full width.

1973. Like 1972. Exhaust stack machined flush with cylinder fins.

1975. Like 1972. Horizontal silencer ears added. Drive washer curved. Exhaust stack longer, not machined and metal thinner. Head bolt bosses more prominent between top two fins.

But - you never know with an old engine - parts are swapped. Especially if you do a Ron and have a penchant for landing upside down on concrete.

Hey!!!!!