 Today, we're not going to do just one engine, but we're going to do two. I'm going to tear down 350 and a 400 two-stroke engine they're both like 96s 98s 350 as some of you might know Doesn't have the dipstick to here like the 400 has for the counter balancer Other than that most of a rest everything's the same I got the jugs torn off already One's got a bad water pump the other one's got a bad bearings in it So we're going to start tearing them down first things first Take the flywheel off and I got my flywheel puller hooked up and I'm going to pop that off Show you how to pull a stator out And we'll go from there. So sit tight and enjoy the show. All right So I got this all cranked off Sometimes you just give it a couple of wraps After you got this wheel puller tight She pops right up Put a screwdriver up here to hold the crankshaft in place. So wouldn't spin next we want to take the stator off and A lot of times those stator bolts are hard to get out. There's one here one there one there So I got a special tool It's a punch it punches and twists at the same time and breaks them then bolts free Show you how to use those Okay, so I meant to say screws before not bolts the three screws Now as you're taking the stator off The last screw that comes out There's a mark there that lines up with the case and that's your timing mark So keep that in mind. You're taking this part pull that out And there's a mark on the case and there's a mark right there so move that out of the way and You've got this goofy little nut Now I've got a special tool The socket that pulls that out. It's slotted and these are Geez look at that I'm torn 20 engines apart and I found this already a lot of these loosen up This one's looser already, so that's not good All right, so let's start this on the 350 you're going clockwise to get it off Down there at the trigger spins right out If you don't have that socket you can take a punch and a hammer and just try knocking that loose get it spin free and then Yeah, just do the rest by hand, but that tool comes in handy. Okay, so I got both of them Nuts off. The only thing you're going to need for the rest of this job now is a 10 millimeter and a 12 millimeter socket and You might need a press also Sometimes you can get the case apart with all of it being a problem And it's not the case halves apart, but sometimes you have to use a press to get everything apart So you've got five 12 millimeter bolts that go all the way around and then for 10 millimeter not to hold the water pump on and To 10 millimeters on the outside, so I'm gonna do both these cases at once And you got this they call it a Collar sometimes that comes out sometimes it doesn't at all three things Come right out our pumps glue Stator out the rest of the way bearings look good It's a good sign There you go, then you got a gasket Bearing is really good on that one. Okay, so next would be taking the water pump and pellars off once again It's 10 millimeter nut What those so there's a nut a washer and a lock washer our comes off you just pull this right off This is gonna tell you Right away bearings are bad Usually these seals go bad So that's the first thing you want to or not the first thing you want to make sure you replace that stuff And if you notice if you can see right here Just some wear on here These uh These bearings go bad and the rubber seal goes bad And I'm not usually wears on that counter balancer chef. So this is your counter balancer. It's your crank This is where you want to pay close attention so This collar came off with that side, but it's normally pull the collar off You got a O-ring Try to save that if it's still good. You have a shim. I'll go back together washer collar O-ring Then you can pull us up doesn't show up in the camera, but there's a timing mark here and when you reassemble that You assemble that timing mark up with the timing mark on that gear Just go ahead and pull out apart Just slides right off. It's a woodruff key that holds it in place and then You don't have if you're not going to do anything with a counter balancer You shouldn't have to remove those 10 millimeter bolts. That's a plate that holds the counter balancer in the case side do that 350 right now and All right on the 350 this shaft for the counter balancer that looks really good. It's nice and clean The water pump slid right off So that's good now the 400 it was kind of crusty I'm guessing part of the seals probably wore off and rubbed on to it So this is clean, this is actually really good I'm guessing there was probably a issue with just it leaking 400 this is all crusty around here If I do reuse it, I'd probably take a little sandpaper and scuff that up You got to be careful because you put your new seals in it'll just chew your water pump seals right out And I guess I'll show you what's next The next thing would be to take your woodruff key out normally holds your gear in place So either it popped out once say I pulled that out So which makes my job a little easier because them them keys are sometimes a pain to get out you pop it out You have to remove that first before you split the case sides and then the next step. Okay, so you have Five more 12 millimeter bolts those will come out and then you can split the case So right now what's holding it up is that collar that's in there Those two things you could do you could pull that gasket out Try to get the collar out Or you could do what I'm doing use the case to help pull the collar out and that's that's the way I like to do it One crankshaft removed and then you want to pay attention. Here's that collar stuck on the seal and There is a o-ring on that side the sides beveled and you got your bearing on this side This is your counter balancer and that actually looks pretty good the bearings sound good Looks in good shape That drives your water pump Yeah, we're sitting good there I'm gonna pull that seal out and Now we're gonna tear the 350 apart. So you saw how I did the 400 So I'm gonna do the 350. I'm gonna tell you what the difference is Here and you can see the collars on here That just came right out No, I don't think I need to rip that case apart, but I'm gonna do it anyway just inspect it I think this engine's in good shape. I think the water pump leaked and it fried the piston Here is the piston. That's pretty toast So this one I could probably just get away with putting the new water pump seals in and the bearings And be good to go But I'm gonna rip it apart and inspect it anyway only cuz I'm this far and see what the bearings look like It's the one thing I did want to show you speaking of bearings is These bearings were bad in here. I can't even turn it with my finger. It locks up So I'll have to take a press press them bearings. I'll put new bearings in on the 400 350 I think we're sitting good Just wanted to show you that and I had to show you this It's talking about crankshaft seals. I have never seen anything like this Crankshaft seal actually melted off or Oh my god somebody used It looks like Think of the word It looks like somebody put quark on there to try to seal the crank If those seals are bad it it sucks air into the engine and leans out the engine that might explain why the Pistons ride. This is this is hilarious. I've never seen this before somebody's makeshift way of Replacing a seal and it didn't work it failed So I thought I'd show that to you. I thought it was pretty funny. So yeah, I'm gonna split this case apart both seals out put some new seals in check the bearings and This one should be good to go. I got the 350 I'll clean up nice Now normally there's a shim that goes in here this engine didn't come with one So I'm not gonna put it back in there. The shim usually goes for end play So what I did was clean everything up nice Pull a little oil on both the bearings and I should be able to take this crank and slide it right in little shove She's in now. I'll put my sealer around the edges and Put the top on just putting a light coating of the 3m Sealer on there And the seal both case house together now. She should be ready to put back together Let's see if I can find a spot for you to sit here while I'm doing that Make sure you line up your doll pens Just kind of walk this back and forth make sure I'm gonna put a little oil on this side, too This helps everything slide together nice there I can Drive my screws through Yeah, everything back all together nice I'll just use the screws just to close it tight. So I got my two long bolts One of those here one goes here Three short ones right now. I'm just snugging that up to Tighten the case up so I'm gonna go on a crisscross pattern and that case house together nice You can see Case house wants to go went together really nice. I'm not far. I'm just gonna torque them right away. I think it's Believe it's 18 to 20 pounds. You guys ain't gonna be able to see this My crisscross pattern don't want to forget the These two bolts one goes up here one goes down here 10 millimeter and I believe those are six foot pounds. I'm just snugging them up and I'll torque those later Now we're done with that side. Okay, so if you remember when I took the engine apart This collar was it stayed on there, but no ring goes on first then this collar That shoves down and you put your new seal on. I like using oil on everything so little oil on the seal It's all the way around Some guys will use an actual sealer put the seal in I don't think that's necessary Just push it out with your fingers Now I got a new seal. That's not gonna leak Now the next step is Put your woodruff key in and bring that around Roof key goes in there and then that's gonna slide out. So on your counter balancer you have Timing mark right here and then on this guy Timing mark is stamped there So turn the crank And sell those two line up and then you'll slide them into place Set the camera down I'm just gonna get this guy started Slide right in. See I kind of had to do that at an angle Both the timing marks. All right, so now for the most important part Everybody seems to screw this up. I've done about 25 different motors I've rebuilt already and People put the collar and the O-rings and backwards. So I'm gonna show you My little cheat sheet if you can read that Hold that there for a second. Okay So once you've got this gear on First there's a shim that goes on There's a O-ring. The O-ring slides over Pull it down Seeing a lot of guys take these collars And they put them on backwards and they smush the O-ring Collar has the beveled side on one side The other side's flat That's gonna go the beveled side down Anytime there's an O-ring that bevel side goes down And Covers the O-ring So once you got that completed And you can take your Water pump. So here's my water pump Bearings in it look good yet Seal looks like it's shot so By a seal kit, there's two of these seals in there one goes in one direction this one goes in that direction Slide that on it put your impeller on Put your washer your lock washer in your 10 millimeter nut. It goes on like that I'm not gonna bolt the dongs. I still have to get my my seals Just to show you how that goes. So for video purposes. I'm just gonna show you how this goes back together I double-checked my bearings on the side of the pan. It looks good. You clean the surface of that off Clean the surface of your water pump put a new gasket on and I also take the seal out of here and And You want to put that in last and I'll show you why So now on the water pump. It has one longer stud that always goes to the right top And you'll see why once I put it together. So Go ahead throw this in here. I'll get my Water pump holes lined up That bearing goes over that seal Over that collar and then you'd put your seal over the top of this and then it would rest over the top of this collar You bolt everything down 10 millimeter bolts 10 millimeter knots go on the water pump And your two 10 millimeter bolts go here and your five 12 millimeter bolts put them in a crisscross pattern torque them down to 18 to 20 foot pounds and The last thing it would be to do Was with your seal on you put this nut on and you would tighten it Conor clockwise So I do not have my gasket kit or my water pump kit So I can't show you how to do that But this was to give you a general idea of how to disassemble and reassemble a 350-400 liquid cooled two-stroke engine. So I hope this helped you out Enjoyed making the video. I said I wish I would have had this the rest of the seals I can show you how this all went back together There you have it Subscribe to my channel. I've got plenty of Polaris repairs two strokes four strokes Whatever you got. Thanks for watching till next time