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Ski-Doo Super Olympique 370 - FIRST START! 1968
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- čas přidán 1. 01. 2022
- Snowmobile season has finally arrived!!!! Time to get some vintage sleds in the powder! The first project to kick off the 2022 season is this wonderful original 1968 Skidoo Super Olympique (or Olympic ... lol) with the 370 Rotax opposed twin cylinder engine. That's right folks, a Boxster engine! Purchased a few years back and never ran, Matt dives into this project head first to access what it will take to get this old survivor back on the snow. Spoiler alert, engine and track damage was detected! If you like old snowmobiles, old motors or wrenching on old vintage iron, you will enjoy this ski-doo video!
If you enjoy mechanics and working on old engines, this Rotax 368cc is a fun one. Made only in 1967, 1968 and 1969, skidoo offered these super 370 opposed engines in Olympique and Alpine models. They put out 18.5 hp at 5000 rpm. They have a single Tillotson carb mounted on the rear cylinder. This particular example, seems to have had a little water damage, but hopefully can be brought back to life. Stay tuned!
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The 68 Ski-Doo would ride over deep snow. Travel right past the Cat & Polaris sleds with cleated tracks stuck. I did it alot. I liked turning around and riding past again. I modified the exhaust to dual with round lawn tractor mufflers. It sounded really good.
I can image a dual exhaust would sound great on a 370. Especially with different length pipes to offset the “poping”! Thanks for sharing the memories and thanks so much for watching!!! Take care!
The sound of that clutch when the engine stalls triggers so many bad memories of my old sleds . Fix, ride, tow, repeat......
Lol!!!! I got the engine all apart right now (stay tuned for those vids!) so hopefully after the rebuild it will be a little reliable!!! Thanks for the comment!
This channel is a jem makes me want to find an old sled
Thanks! Really appreciate the comment!
I had the same piece of junk back in the mid 70s when I was a kid that I bought and it also had a bad track and stripped spark plug hole.. got the head helicoiled at napa and the plug blew out again as soon as I started it.. Anyway they installed the helicoil backwards so I fixed that myself got it running and the track started coming apart.. Ran ok but then I found a piston was cracked and rings were broke in back cylinder and nobody carried that and I was told parts weren't available because the machine was to old even though at that point it was only about 7 yrs old .. Well threw it back together and ran it as is cracked piston fitted with Briggs and Stratton lawn mower engine piston rings with missing track chunks for a few years then finally sold it to someone with an identical unit and moved on .. That junker ran damn good with Briggs lawn mower rings and was quite the talk of the farming neighborhood... Probably easy today with Internet to get any parts it needs but back then every part seemed to be obsolete.. Boy things sure have changed and this video brought back some silly memories of that machine ... Lol
Yeah these engines were known for having stripped plugs. Both the fact that they were hard to start and the plugs were lined up strangely contributed to that… Parts are definable not easy to find, but if you are persistent and willing to pay the price, they can be found! I never heard of using briggs rings in an engine like this, but it makes sense. Probably easier even to this day to find suitable Briggs rings vs original Rotax. Thanks for the comment, I really enjoyed reading it! Glad you enjoyed the video! Take care!!!
My dad bought his new. Allways had problems with the front cylinder often not running. It was a comon issue.
I was 9 years old and it was hard to start because both cylinders compress at the same time. Thats why the recoil is so big.
They dont like to idle they foul the plugs.
There were no NGK plugs then and they didnt like champion plugs. They ran on bosch sparkplugs.
Im amaazed you can get parts for the engine. They are super rare.
The keyway went bad in the crank for the fly wheel. The engine was scrapped .
Yeah parts are hard to find, so I buy them when they come up for sale. Also have a lot of parts motors to keep the runners alive! Thanks for the info and comment, I enjoyed reading it. Take care!
Yep had the same one and all the old timers / mechanics insisted it was a single cylinder because the 2 cylinders fired at the same time... Lol.. I tried arguing it's still has 2 separate cylinder and piston assemblies making it a 2 cylinder but those arrogant old timers wouldn't here of it!!! Lolroflmao.
Those opposeds are a neat engine, but many were damaged or ruined by water. Once the airbox came off the mess with the carb they then sat out un covered and got water in them. Pistons and cylinders are from what I understand hard to come by. I had a 370 as a teenager, ran like a scalded dog compared to my 12 horse Olympic when it ran. Probably needed crank and case re sealing. I didn't have the tools nor the skills in the day. I now have a 370 chassis running a '67 10 1/2 horse engine I pulled off a machine I parted out when I was about 14. I have a couple vids on my channel with it in them.
I don’t want to spoil my upcoming vids, but this one definitely got water in it at one point…. The cylinder with the carb is slanted down, so all the water pools in that cylinder. I am trying to save mine because the damage is not that bad. I will definitely check out your vids. Thanks for the great info and thanks for watching!!!!
Great diagnosis video! Going to check out the next videos.
Glad you enjoyed. Thanks for watching!!
Thank you for the video, your old ski-doo is a good candidate for rebuilt, have a good season !!
I'm glad you enjoyed! Thanks for watching!!!
good stuff. nice sled! I look forward to whatever comes next on it. I recently rebuilt my hirth 634 twin, it'd be fun to see you rebuild that engine!
About a 90% chance you will see this engine running before the end of the season...
Going to be a nice project for shur. You have a really nice collection there.
Thanks!!! Yeah, I'm excited to see how it turns out!
Another great video. Can’t wait to see what you’re working with next 👍
You'll just have to stay tuned and see!!! Thanks for watching!!!
I’m going to have to step up my game. Lots of nice video work on this one Matt.
LOL! Glad you enjoyed the video. Thanks for watching!!!
That cylinder head would come off relatively easy. I think. And O’Reillys, autozone… Princess auto? In Canada… Don’t know your stores. But they sell a spark plug thread insert kit. It has, the tap. The insert tool, and several inserts. They really work slick. I did a couple of Volkswagen heads. Aluminum. And they worked perfectly. I think I paid $28 for this? Maybe not more than that. But it was well worth the price. And once you have the tools. You can just buy the inserts. Cool old sled. I didn’t know that Rotax made a opposed twin. I know that Evinrude used OMC opposed twins. But I didn’t know that Rotax made one.
I don’t want to spoil the upcoming videos, but the head gave me a heck of a lot of trouble coming off!!! Two of the studs were fused to the head… Thanks for the feedback on the insert kits. I am shopping for one currently and glad to know they are a reliable fix. You are right, they are about 40$ cad. As for the rotax, its the only model that I am aware of that was made opposed. They only made them for 3 years and from what I am told, they were not very reliable….. I’ll just have to learn the hard way!!! Thanks for watching! Take care
@@mattsws 👍👍
Cool video My dad bought one of these new it was the fastest machine around that year in Dauphin MB. As a 9 year old I got in lots of trouble with it. But starting was a bugger for my skinny little arms. lol
I'm really looking forward to seeing its performance vs single cylinder models... I had a feeling that it would be a really torky machine and would haul A$$!!! Hopefully going to have it running before the end of this season. Thanks for the comment, glad you enjoyed!!
I’m looking to pick one of these super olympiques up with the 370. Located it today… sadly the motors stuck but I have also located another 370 to go in it!
To add to your 370 collection!!!! I got my Olympique first, then the Alpines!!! But got the Alpine running first. Really looking forward to finishing the olympique and trying it out!
@@mattsws I’ve got 3 olympiques but 2 are 12/3’s and ones a 335e so none are the 370 sadly but I think I have one coming and also I have a 69 alpine with the 370 and 3 more 370’s that need a sled to go in which will go in the other 2 super alpines that I’ve found out in the boonies! Those 2 need lots of work still! Just finished my 68 alpines throttle cable assembly now I should just need the belt put on!
another great video! Thanks!
Thanks!!! Glad you enjoyed!!
Nice vids ! Ride the wave ! L'engouement pour le vintage sled est fort en ce moment ! Greetings from Lac st-jean ;)
LOL! Ca fait 25 ans que je suis la dedans et la je commence a être a mode!!! Thanks for watching!!
this channel will eventually grow I believe in you
I appreciate your belief in me! Thanks
Cool sled. I got the 299cc in mine.
Cool! Probably a lot more reliable than mine!!!
@@mattsws yeah, it's one of my most trusted vintage sleds. One I can leave the farm and trust to get me back home on. But I'm interested in the 370cc engine. I've never owned one.
@@johnpetersen8238 We'll your in luck! I have a bout 4-5 videos coming up on the 370... Hopefully going to ride it this season!!!
@@mattsws Hope you can get it running good.👍🍺
@@johnpetersen8238 Thanks!
Great Video
😃
Drive axle sprockets will all shear off before it makes it out the door!
Don’t worry, they will be replace before the sled ever touches snow again!
Wicked cool bud the quality of your videos are amazing great content too.
Je savait pas que olympique avait un twin cylinder on apprend des chose toute les jour lol
Yeah it was one of the first twin cylinder engines in a production skidoo! They made limited amount in 1967, but they were officially available for the public in 1968. Thanks for the comment and thanks for watching!!!
@@mattsws Also offered in 1969, but rare! #série 6914
@@ericvaillancourt4278 Exactly. You see Alpines with 370s more often, but Olympiques not as much.
super de quebec je vous ecoute
Merci beaucoup!!!
Fun fact about the 370, it's simultenously fire engine. Je veux dire que les deux cylindres font feu en même temps.
C’est pour ca ils sont dure a cranker!!!
what do you use for old gas tanks? I thought of sand or the stuff they use in sand blasters and fill em up and find you an old paint mixer or shaker like a paint store has. old fuel tanks are a big pain to clean up or maybe carb cleaner at about twenty bucks a gallon can. Its hard unless you can find say a plastic replacement tank not just snowmobiles any type motorcycle or four wheeler or small engine. Its like a boxer engine like a subaru or volkswagan maybe crazy but you never know out of the box thinking.
The steel tanks on these sleds are part of the frame, so cleaning the rust is almost impossible without cutting them open. Usually they leak also, because they are steel… luckily this one looks good! The engine is a boxer style engine. They weren’t very good for many reasons, but I still find them cool, so I am trying to revive this one! Take care!!!
My Dad one back when It was new, but he traded it for the 1970 399cc because the apposed cylinder gave him nothing but problems. He said it would rip your glove off, when pulling the start cord.
Yeah, everyone I speak with pretty much tells me the same thing... I guess I'm gonna have to find out the hard way!!!!
Did you, or would you put some straight two stroke oil in the cylinders and also squirt some two stroke oil down the carb onto the crank and rods before you pull the engine over? Help out on the dry startup.
I didn’t, because the engine was turning over ok, but on an engine that sat for 10+ yrs, I would recommend turning it over with oil as you describe. It will smoke like heck when it starts, but you give the rings, etc a chance!
Matt, put some contact info in your "ABOUT" section so I can get ahold of you. Thanks ! --- Jason
I will be revamping my channel page shortly and will complete the ABOUT section with contact info. I should have it done in a week or two. I'll let you know when its done. Take care
Do a rebuild video on that Keihin! About to tear into mine. Just waiting on the fuel pump kit for it so if I rip a gasket, at least I can repair it. Pretty sure the needle is stuck as the sled floods out.
I am planning on making a couple carb rebuild videos. Probably going to make one for each of the 3 size Tillotsons... HD, HR, HL. The only Keihin carb I have is on my Honda CT-70... Probably going to make a vid on that this summer season. Stay tuned! Take care man!
Ski-Doo bombardier 440 looks similar
Yup, all the olympics of each year pretty much had the same frame and body, but engine and hood colors varied. Thanks for watching!
Thank's Matt for the souvenir. My dad had 2 bombardier one 1961, 9 forces and one don't know the year but 18 forces.
Do you know what this 9 forces and 18 forces correspond in term of is it a 250 or 300 or 350 ?
Hi Robert. In 1961 they made a model with a Kohler 4 stroke (7hp) and a 247cc JLO 2 stroke (8hp). Starting in 1964 they had skidoos with 247cc Rotax that made 9hp. In 1969 they made Olympiques with a 320cc Rotax that were 18hp. Maybe your dad had one of these! I’m glad you enjoyed the video. Thanks for watching!!!
hit that windshielf with some car polish n buff it out n it'll look brand new same with old golf cart windows there all plastic to
Great advice. Will definitely try that!
ay
yo
👍👍😎✌️🤟⭐️⭐️⭐️⭐️⭐️
😸🫶🤝👍👍👍🎉🎉🎉
could I have a snow mobile I cant get one because my family is kinda poor and we just bought a house
A house is better than a sled. Take care
matt's right. but keep an eye out, you can sometimes find a reliable old sled for sale for a good price.
Those engines were crap. Reason they were around for such a short time.
Yeah, that’s what a lot of people say. Makes sense, seeing as though they abolished the design after 3yrs for horizontal twins. I still think they are cool, so we’ll try to get this old thing running again! Thanks for your comment!
Just ride it then replace parts. You put me to sleep as slow as you go. You act 25 years older than you are.
What a lovely comment! Thanks…
Those opposeds are a neat engine, but many were damaged or ruined by water. Once the airbox came off the mess with the carb they then sat out un covered and got water in them. Pistons and cylinders are from what I understand hard to come by. I had a 370 as a teenager, ran like a scalded dog compared to my 12 horse Olympic when it ran. Probably needed crank and case re sealing. I didn't have the tools nor the skills in the day. I now have a 370 chassis running a '67 10 1/2 horse engine I pulled off a machine I parted out when I was about 14. I have a couple vids on my channel with it in them.
😁