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May 23, 2018, 03:37:01 PM
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  1966 Olympique S
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   Author  Topic: 1966 Olympique S  (Read 211 times)
Doonut
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1966 Olympique S
« on: April 27, 2018, 07:29:39 PM »
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I recently picked up a true barn find, Olympique “S” at an auction. Going to be a yard runner for now. Serial number BS6, 247cc with the original aluminum cylinder and the larger muffler. I know these were fitted with dual HL’s, but it has a HR2a now. Would kinda  like to get an original carb for it, but I doubt I will ever come across the dual hl’s anytime soon. Read somewhere that Bombardier substituted the dual hl’s with a HR4a??  Now, does the 4a have a wider stud stance than the average HR??  Somebody widened the 2a to fit the studs. Weird stud pattern, too wide for the HR, and I put on a hr carb spacer for reference. The 2a and 4a are very similiar. Thought about using a Hr1a. Anybody else have any more info on the carb application for the “S”??
Also, was the S rated 14hp? Some of the spec books say 10.5 hp?? Any other info on this engine?  Thanks!
Some pictures to share.





















« Last Edit: April 27, 2018, 07:41:49 PM by Doonut » Report to moderator Logged

1967 Alouette 707 - 1967 Super Olympique 299
1967 Alpine 299 - 1968 Super Olympique E 299
1969 Nordic 371 E - 1970 Olympique 335-1970 Alpine 399R
1971 Boa Ski Mark 1 - 1972 TNT 340
1972 Olympique 399 - 1972 Nordic 440
-1974 Olympique 399
1978 Elan 250 Dlx - 1982 Alpine 640
1970 SkiBee Scout
oly_man
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Re:1966 Olympique S
« Reply #1 on: April 29, 2018, 05:54:54 AM »
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Now that's a cool barn find there!  It looks to in great shape!  The seat looks to be in about the same comfortable state my 66 was when I got it.  The foam bits just disintegrated and turn to powder when you touch it.  How is the tank on that one?  Mine was literally of old gas and rust.  The rust had come loose and turned into 3/4 tank full of a black/Brown lumpy rust sludge.

Not sure if he still has it, but here's a guy that was selling that manifold up here in Ontario.  Ask him about hl's too.  http://www.acscc.com/forum/forum/forums/vintage-snowmobile-classifieds-1981-and-older/95082-66-oly-twin-stack-hl-manifold-125

The s was 14hp, and the steel sleeve single hl was 10hp at best lol
Cheers
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hermit
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Re:1966 Olympique S
« Reply #2 on: April 29, 2018, 06:57:06 PM »
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Awesome find! They were the performance model that year, and dual carb or not are desireable models. Personally I'd buy a can of wd 40 and douse that engine with it which will clean the aluminum up easily and protects it too. The fan housing on them is the smoother style and benefits by lacquer thinner to get the final film off after wd 40 but doesn't change the finish. Some people glass bead them and while its clean, it changes the sheen. As far as the carb(s) go the 1A will suffice and has an AMF application so I imagine was for their engine that used a dual HL combo also. The 4A is Bombardier though. I know a guy who might have one for sale. Like the 1A they have the hogged out stud holes as the bolt pattern is larger than std HRs. As far as the twin set up HL209A and HL 210A are the matched pair. They are actually out there in greater abundance than one would think. There was a guys who had a lot of the new old stock carbs from an AMF inventory. Whats more difficult is the manifold. But even so they surface once in a while. I'd shop until you found a reasonable price one at a show etc. Otherwise the complete assemblies can get costly. I have pics I'd email you as I'm not sure if my photobucket pics will post here anymore. doublet@twcny.rr.com.
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'65 Olympique
Longnecker
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Re:1966 Olympique S
« Reply #3 on: April 29, 2018, 08:06:18 PM »
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Olympic S with the correct pair of carbs in photo.
Definitely hard to find and they can be expensive.
14HP seems correct.

Top carb is LO speed with a LO speed adjustable jet, HI speed is fixed, has a ball check valve and a choke.

Bottom carb is HI speed, only has a high speed jet, no low speed, no ball check, no choke.

I think the difficulty in keeping them running is getting the pulse from the crankcase to the carbs. Many places to leak between flanges. The HR+ end of the Y adaptor has a 360 degree pulse groove vs a pulse hole, definitely difficult to seal. Once they are sealed they will run.

Cannot find any gaskets for the HR+ that do not encroach in to the pulse groove, need to hand make and then spray with copper gasket seal.

The plastic carb isolation spacer that is on your cylinder is period correct. Hang on to that one.

When riding the sled most of the time it's only on the top LO speed carb, gets excellent gas milage.

One thing I've noticed is the primary clutch requires quite a few shims to get it into alignment with the driven secondary pulley. This was an issue in 1966 and on the recent 2 sleds we are running with the same motor. Not sure why.

Nice find.



A good in-line filter and the finer stainless steel screen in the carb will keep it starting and running well.

The photo below has the carb with a triple stack of plates, a double is correct. I tried the triple just to see if it made any difference, it doesn't. Just haven't gotten around to swapping it back.

The linkage between the carbs has the top carbs lever contacting the bottom lever when the throttle is squeezed about half way. Because the lever on the top is 2x longer than the bottom, the bottom opens fully with the remaining 1/2 squeeze of the throttle.



The larger muffler is specific to the "S" and is painted silver vs black. This one is from Spaulding.

« Last Edit: April 29, 2018, 08:37:30 PM by Longnecker » Report to moderator Logged
Doonut
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Re:1966 Olympique S
« Reply #4 on: April 30, 2018, 11:04:01 AM »
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Thanks guys for all the great info!!!! Cant wait to start on it next winter, and give it a good polishing and clean up. After reading all the info, I may stick to the HR carb swap instead of trying to figure out the dual HL’s. Maybe alot simpler to get it tuned in. But you never know, could find something before next winter,,,,,
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1967 Alouette 707 - 1967 Super Olympique 299
1967 Alpine 299 - 1968 Super Olympique E 299
1969 Nordic 371 E - 1970 Olympique 335-1970 Alpine 399R
1971 Boa Ski Mark 1 - 1972 TNT 340
1972 Olympique 399 - 1972 Nordic 440
-1974 Olympique 399
1978 Elan 250 Dlx - 1982 Alpine 640
1970 SkiBee Scout
Bones
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Re:1966 Olympique S
« Reply #5 on: May 1, 2018, 08:54:00 PM »
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Great pick up Doonut. It looks fairly good.
A few years ago that sled was definately on my "must have" list, its just too kewl.
Bones
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hotdoo
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Re:1966 Olympique S
« Reply #6 on: May 3, 2018, 01:05:17 PM »
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Got two of these, one all original with the air box,it's on rack at cabin and other one is made up to look like a racer I've seen on postcards about Munising races to island back in the day, it also has a pipe on it just to make more noise! lol
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