I Bought a 700$ Vintage Snowmobile MYSTERY ENGINE!!!

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The title sorta says it all...
SPOILER ALERT! Keep reading if you want to know what the engine is!!!
I ended up buying a complete Rotax 245 RV motor off a complete stranger from another country ONLINE... It's the engine from a 1976 Skidoo Tnt RV 250. I was quite excited to get my hand on a complete 250 engine because they are relatively hard to find. Upon first inspection the vintage Rotax appeared to be complete with dual Mikuni carbs, Polar fire (Bosch) CDI ignition, wiring harness, belt, clutch and recoil.
The rare 245cc twin cylinder free air engine appears to be in quite good condition, except for the fact that the rotary valve was jamming at half revolution. Removing the cover solved the issue and further repair will be require. The pistons looked new, so a complete overhaul will not be likely, but a teardown, cleaning and gasket replacement will be next for this Rotax. The crank seals will also be replaced.
If you enjoy old vintage race sleds, dIY projects, mechanics, repairs and working on old junk, you have come to the right place. I hope you enjoy this video!

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7 сен 2024

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Комментарии : 51

@rumpestillskin4671 7 месяцев назад

Peter Parker is also Spiderman. You bought an engine from Spiderman !!!! That's so cool !!

@mattsws 7 месяцев назад

I sure did!!!

@shawncordeiroTerraceBC 8 месяцев назад

rotax can tell by the clutch

@mattsws 8 месяцев назад

Sure is! Thanks for watching!!!

@johnpetersen8238 Год назад

I like it.Hope you can get it running.

@mattsws Год назад

Thanks! Me too!!!

@Wantsail Год назад

Happy New Year Matt. Great video.

@mattsws Год назад

Happy New Year to you too!!! Thanks for watching!!!

@markjoudrey7036 Год назад

Awesome video Matt.Looking forward to your build.Ive got a 340 that I hope to get running .

@mattsws Год назад

Glad you enjoyed! I’m looking forward to getting this one running. Take care!

@the4thj Год назад

That is a very unique engine!

@mattsws Год назад

Sure is!!!! Thanks for watching!!!

@rictard1 Год назад

Un 250 rotary valve avec CDI en 76 ...Wow !

@mattsws Год назад

Oui! Ca va etre le fun a remonter!!!

@rictard1 Год назад

@@mattsws Si t"as pas de body de RV tu mets ça dans un Elan SS ça fait un Elan SSX.

@mattsws Год назад

@@rictard1 En effet, mais j'ai un body de 245 sans moteur, faq il va aller la dedans!!

@rictard1 Год назад

@@mattsws Wow tu vas avoir une belle pièce de collection !

@mattsws Год назад

@@rictard1 j'en ai un complet propre, pis l'autre qui a pas de moteur va avoir un pont en rubber pis ce moteur la. Ca va être une machine pour faire des randonnées!!

@jefflary5457 Год назад

great to see you posting again Matt. A friend of mine was always showing up in the neighborhood with the newest hottest Ski Doo's one was a 340 R/V CC I think that meant 340 rotary valve Cross Country. Man, that thing was fast then his dad bought the 9500 Blizard now that was unreal.. JeffinMaine

@mattsws Год назад

I think all the RV CC's were liquid cooled sleds. The 77 was the most powerful, then in 1978 (or 79) they added a HP limit in the CC class and the 340 in those sleds was a tuned down version of the trail sleds... At least that is what I remember someone telling me a while ago. Thanks for watching!!!!

@woodyWoodTimber Год назад

happy new Yrs nice old motor ,bring more

@mattsws Год назад

You too! Thanks for watching!

@lucasledford7419 Год назад

Peter Parker from Kansas thank you soo much for the shout out I did not have spark plugs for it I'm sorry and the carbs were cleaned by me

@mattsws Год назад

Thanks again!

@lucasledford7419 Год назад

No problem glad I could help someone in need for a good price that's what's its all about

@mnmarlin6074 Год назад

Nice video!

@mattsws Год назад

Glad you enjoyed!!!

@fredliperson9171 10 месяцев назад

1975! ...76 was a 250

@mattsws 10 месяцев назад

The engine tags on both the 75 and 76 245/250 rvs said 245. This one is a 76 because of the bevel on the head fins. Thanks for watching!!!

@NorthernANTs Год назад

Great video my friend, looking forward to seeing you getting it running. What sled are you going to put it on?

@mattsws Год назад

I am probably going to put it in a spare 1975 245 RV chassis I have lying around.... Shhhh, it's a secret for now! LOL!

@Stuckin330 Год назад

I love my arctic cats I like older ski doo but then older ski doo engines always had an issue the Moto ski I had with was part of bombardiar it was like the racing style engine daul carbs an pipes but never could get her to run an evrything was good . Ended up scraping that sled . Also had a 377 that thing was fast but never ran good for few rides it was always haas issues so I got into arctic cats them older Kawasaki 340 440 which were in older arctic cats now those ran great an easy to keep running then they switched to Suzuki engines an those were very reliable had few jag 340s and 440. Cheetah s and zr modles. I really loved my vintage jag 340 that had the air cooled hood style an had a Suzuki air cooled 500cc engine in her . Not fan cooled but air cooled were the top end of the engine stuck out the hood so air can flow threw the fins . An that thing would do 100mph easy an that’s fast for a vintage sled it would keep up with the newer zr modles till about 70mph then the zr would pull becouse they had bigger size engines but for a lil jag 340 with the 500 engine made a great drag sled or oval track

@mattsws Год назад

Yeah those air cooled jags are nice sleds. Thanks for the comment and thanks for watching!

@stevenbaker9327 Год назад

So whats binding? Rotary valve shaft bent?

@mattsws Год назад

There was a scuff in the rotary housing and the valve was snagging on it... Took the housing off, sanded the scuff and turns over real nice. I was very relieved!!

@stevenbaker9327 Год назад

Very nice ! Good you caught that! Wonder how that happened? Something get in there?

@mattsws Год назад

@@stevenbaker9327 I just got the engine from a guy who bought it on Marketplace. I guess I'll never know!

@jeffreyhagelin3672 Год назад

Too ;bad you don't have the 1975 black chassis. Those were wicked light and fast as hell.

@mattsws Год назад

Have a couple 1975 245 rv chassis, but they arent black… What sleds are you referring to??

@jeffreyhagelin3672 Год назад

@@mattsws The 1975 was the oval racer with a 2 gallon gas tank.. orange nose cone and an asymmetrical head light. Doesn't sound like you have the '75s I'm referring to the hoods not the chassis.

@mattsws Год назад

@@jeffreyhagelin3672 Yeah I have two of those. One is complete in pretty good shape with original small tank, engine and cleated track, the other is missing the motor, so this motor will be going into that one. They are one of my favourite sleds!

@jeffreyhagelin3672 6 месяцев назад

I would have to say you got a damn good deal.

@cybair9341 Год назад

I thought it would be a damaged crankpin. Fortunately, I was wrong !

@mattsws Год назад

Very fortunately for me!!!! Thanks for watching!!

@cjackfly Год назад

Do you know how much bad karma would come to an American person who robbed an average Cannuck?!

@mattsws Год назад

Yeah buddy!!!

@charlespicote9977 Год назад

Hey !! Je te connais toi # Loutec 😂

@mattsws Год назад

Hey! Ca va!!! Ben oui, je fais des videos RU-vid sur les projets que je fais dans mes temps libre. Ah Loutec... des bons souvenirs de notre jeunesse!!!!!