Replace Mercruiser Alpha 1 Gen 2 Impeller , outdrive service with Steve

all right so on today's YouTube vast Motorsports episode we're out in the shop here and I'm going to be working on this mer Cruiser out drive it's alpha 1 I'm going to be replacing the impeller it be the same on a gen two or a gen one either one so let's go ahead and get started on her so I'm actually doing a lot of work to this particular boat for Robbie so uh and you're welcome Robbie so I did go ahead and already drained the fluid you'd want to go ahead and drain the fluid before you separate these two halves or else you're going to make a mess because this upper unit also has gear lube in it and there's a seal on the other side where this splits so anyway you got your one big drain plug here and you've got your vent plug right here and you just pull both of those so we're going to go ahead and take out the four bolts that are going to help separate the unit there's one hiding in here and there's one on the front so I just take a they're 5/8 I had have a nice little swivel set up here that I use on my gun so I take hold the bottom nut stick this on the top zip them right on out okay makes that real simple I'm going to throw them in my magnet tray even though they are uh stainless they're not going to stick but at least it holds them and pop this little cap off if it's still got the cap a lot of times those get lost booger for me that rubber cap now that's a should be a half2 inch down in there I'm going to take I got a shorty and I've got my pretty good extension because you want this to be tight you don't want to drop your socket in there and lose it so let's go ahead and get that broke loose matter of fact I think I'll just use my gun okay now what that's doing is there's an anode on the bottom under here and that's actually what I just undone so again I'm going to pull my socket straight up and out I don't want to get it hooked on the side where it falls off the extension I'm might have to take slide this back on my rack here to make room for this to fall out that's the anode that goes on the bottom now you can see the big slot here it's why I reached under I was holding it up into place so it wouldn't just sit there and spin as I'm undoing the nut keep it up against the bottom of the out drive in that slot just kind of throw that on the bottom now that exposed another nut uh Bol up in here it's a 9/16 so I'm going to go ahead and switch them out again you'll need a 5/8 9/16 and half inch to do this procedure here that [Music] we're okay so I reached up in there and I got my 9/16 on it just going to undo this take that one out now on the front we need okay now on the front we need a half2 inch here on this one okay so I got the half2 inch undone from the front now this is a late model so it's got this little assembly here that's for the speedometer hose and for whatever reason the hose wasn't actually on this one it's it was just hanging loose but give it a squeeze go ahead and pop pop it up and off because you got to have all this out of the way in order for this upper to slide off so now she's pretty much ready to separate all right so I do have this little stand that I made up used to be an AC recovery machine back in the day so I just rigged it up like this welded some stuff on so it holds out dries really nice because I do quite a few of them throughout the years and I just like my stand take you a big Mallet give it a couple smacks wouldn't really hit on these fins or anything because you could break those off and of course she's trying to be a pain in the butt m imagine that but if you do any prying you need to be really careful you don't want to damage or break any of these surfaces it's trying to open up there we go I'm going to take this upper half lift it straight up and off find somewhere to lay it out of the way especially where the uh splined shaft is not going to be laying in dirt or sand or any of that let me grab an Old Rag and get some of this cleaned up real quick so I took the rag got most of the oil up and then I took some braid clean and spray it off little paper towel action cuz I'm reusing this uh base that metal cover so I don't want to make too much of a mess while I'm doing it all right so then we're going to grab this Rubber seal here try to get it worked up slide it off the shaft there take a 5/16 or 8 mm and zip these out take those out put them in the dish tray there now we can take and slide this assembly up take and inspect the inside of the housing there you want to check to see if there's any grooves here and there's not you want to see if there's any excessive grooving here and luckily there's not so this housing is good and reusable now the actual impeller itself as you can see the ends are not torn off or ripped off and it's still somewhat flexible so that's a good thing tell you when they sit in the water all year like this one does or at least you know six or eight months of the year stuff starts getting stuck so I don't really see any really bad cracks or anything this impeller luckily was still in good shape but it's not something that we can chance and uh especially since I had the out drive and stuff off we're not going to take any chances and this one here goes to key right here the slotted keyway it's laying on the shaft there still stuck now we're going to take and pop this gasket up here all right like so lay that to the side now I'm going to take and scrape this off I do want to show you a little something something now this is a little flat o-ring type of thing and what it does is when the upper half comes down and the lower half go together this is where the oil is going from the upper and the lower that's the only passage for the oil to go between the two so we want to make sure we pop that out okay and it's flat we're going to put a new one I'm going to take a little screwdriver and just clean inside that little Edge there to uh just make sure it's nice and clean hit it with a little brake cleaner before I put it back together just just do not forget to put the little flat washer in there before you put the two halves together and another good thing to check is the seal here there's no oil residue or anything around it uh this one didn't seem to have any like in the water you'll see the rainbow effect that's letting you know you're either leaking dear Lube oil or fuel out of the engine or just really if you got excess blowby or something in the motor it could do it too but when you're just sitting in the water chilling or whatever you see that rainbow effect you've got to leak somewhere on your out drive and this one luckily was not doing that and everything looks good there so we're going to leave this one alone you can replace this whole assembly here if you spring a leak same with up here on the shift shaft but thankfully like I said everything seems to be good and sealed so we're not going to bother with that just going to take my scra and clean this surface off pretty good got my new little kit here got the impeller and the plate some O-rings new guide for where the tube comes into the bottom half go ahead and get this out of here I like to go ahead and match it up make sure see it's off offset that's the way this one was on like this so you don't want to try to put it like that we need it this way so it matches so same thing with the gasket you wouldn't do it this way you need it this way okay so we're going to slide the gasket on first Slide the plate on next and then we're going to have see these should be these are the same give it a little different for uh because it'll fit a couple different models so now go ahead and undo this don't forget about the new kit those coming a new one take a little bit of Vaseline put it right there that way it'll hold the key in place you don't have to worry about it falling or dropping or anything you're going to go ahead and take oops put a real thin coat in here too that way on that first initial startup or spinning of the motor it's not completely dry that's what damages these impellers is trying to dry start you never want to run your boat without at least having ear mus or being in water okay so we got that now what I'm going to do is I can see the impeller it was on this way and the fins are bent this way so I'm going to picture in my mind I want this on here so I'm going to have have to twist it this way tell you what this is a lot tighter than the little Johnson outboard I did recently okay all right so now that will be correct now what I'm going to do is I see I've got my shaft over here on this side or the keyway I'm going to spin this around right in that position drop it down on here like that okay now this kit being cheaper I've got couple layers of gaskets to try to line up the holes if you've got one of these rubber coated it makes it a little bit simpler of course I usually would use some thread sealant but of course I don't see I mean uh Annie sees but I don't see it over there my my box right now so I'm just going to use a little vaseline because these were T pretty difficult to take out they were uh acting like they were trying to seize into that aluminum because like I said it does sit in the water a lot they're nice and clean I'm not too worried about that but you know anything will try to sees into the aluminum as it sits in the water and gets electrolysis corrosion see if I can get that started okay sometimes you want to start stuff by finger finger tape but the gun actually helps me hold it straight CU it was not going in straight all I did was just zipped on my hair just to make sure they were starting good don't want to strip anything that way it keeps it all centered because this pump is so offset it kind of fights you a little until you get everything tighten down and started actually the gun is pretty much dead anyway so don't let that fool you how noisy I wasn't um stripping anything now that I got them run down I'm going to take by hand and make sure they feel good okay that's that I do want to take and clean this little Groove out back here where that flat o-ring gasket is going to sit make sure that little Channel's cleaned out okay show you what we got actually I'm going to go ahead and slip this one on first you can see how it's mushroomed we want that down against this housing take slide this down till it makes contact and then just push down a hair more doesn't need much you don't want to wear it out and it'll it'll help uh reset itself when it's on the boat and starts running but you want to push it down a hair to make that mushroom flare out a little and that's creating a good barrier there to push the water up this tube and to create more suction coming in the fins on the bottom there okay so what else we're going to do here is this one stayed stuck inside the upper unit obviously it's it's on the pipe in there this acts as a guide that's why it's so big here it'll help guide the it there's overrings in here and it'll help guide the tube into this if it hits on the side it's shamp down so we want to take this make sure this is clean here and dry it's working all it has to do is guide that tube up into it the pipe there so it comes with these three smaller O-rings now these two the ones that match those are going to be for your drain and fill plugs the one that we're on on the bottom here and on the side up top the vent plug um those are your new seals for that and I really like these style these are the nice rubber coated metal and then this smaller flat one here this is for over here where I was talking about the gear lube goes from the upper and lower unit now I'm going to go ahead and put a little bit of Vaseline in there like so just to hold this and not let it go anywhere so we're going to drop that in place and push it in nice now see this one I can feel now with the new one is sticking up protruding higher than all this metal around that's what we want the other old one was smooshed flat that's no good that won't make a seal anymore all right so now we're going to take try to set this down on here straight like so now if you was trying to put it down on there and it didn't want to seat quite properly you could spin the prop well then it would have to be in gear or you can reach up here and just give us a turn a little normally if you just wiggle a little like I did and then let it drop down there's a pin here to hold it straight so now we're in place everything is good time to start putting some bolts we're going to put some bolts in you got your four nuts and bolts go along the sides two on each side let get them started by hand got our long one with the half inch head that's going to go right here in the front just kind of get it started by finger then we got our our smaller one here that's uh the 9/16 head it goes in the back so what I'm going to do is go ahead and put it on the extension like this just going to get it where it's a little snug not tightening it yet I want to get all of them in and seated first all right so now that I have all of them in I'm going to go ahead tighten the four main bolts first not trying to break them off this is a big very powerful half inch gun not trying to crack any housings or anything just getting her nice and tight now I'm going to take tighten this 9/16 on the bottom [Music] here put on that switch it over and put my half inch on here I want to do this front one nice and tight there slide it on back to where I can get this uh put my half inch back on the long extension so I can reach through with the anode I'm going to keep this to the uh back side here it's deep so we just kind of stick it in like that very carefully stick your socket Down in the Hole wiggle the bolt just a little get it straight I actually dropped the ano just a little bit to where I can try to get it started straight want to make sure we're not stripping anything all right just snug it on down being careful when you pick your socket up out of here like I said don't don't catch that Ridge and make the socket drop down in there I mean you could get like a magnet or something and get it back out but it's just a pain in the butt cuz the hole is so small and just take your little plug and get it pop back into place there all right that's how you successfully change change your impeller in the alpha drives doesn't matter gen one Gen 2 very similar bolts are little not even really that much different or anything I think yeah the the uh gen one I don't think has the nuts on the bottom just screws all the way through all right so the last thing you'd want to do but I'm G to wait until it's on the boat because uh this one does have the little check valve over here with the reservoir overflow Reservoir but uh and you can do it right here on the stand but you just take your top plug out right here for the vent take your bottom plug out have your pump screw the pump in with the lube pump it all the way up until you start seeing it trickle out right here grab your vent plug and screw it in and that creates a little vacuum where it won't just pour out as fast but you want to be quick at the bottom when you unscrew that uh little fitting out with the hose on it to use pumping in have your finger ready just to put it over the hole and have your drain plug handy where you can grab it real quick tighten that up plug it off then your out Drive is full and it's serviced with all new Lube it holds about a quart a quart and three4 so almost two quarts but if you have two quarts on hand that'll do it and then you're going to need to refill this little Reservoir jug I always like to run the motor in the out drive a little bit because there is a air pocket up here and the line itself you know Lube's pretty thick the line is probably three four or five foot long on different boats so I always like to run it and then come back and double check the reservoir up on the engine and then top it off from there how you need to but all right I hope you learned a little something and if you enjoyed the video give me a thumbs up please and I hope you sub subscribe hit that Bell notification that way you can keep up with the upcoming videos check out some of the older videos I've got a lot on there we're always working on something whether it's boats cars trucks bikes golf carts like I don't care what it is I work on it all pretty much do anything we might be going uh Adventure hunting on the I jumping islands and Out on the Ocean or running up and down the inter Coastal waterways are on this beautiful South Carolina Lakes so anyway y'all have a blessed day hope you enjoyed

Channel: Vassmotorsports

Views: 3,635

Keywords: mercruiser, outdrive, alpha, alpha one gen 2, impeller, diy, #trending, #viral, #viralvideo, #mercruiser, replace, replacement, repair

Id: 604HfoxxVW8

Length: 31min 14sec (1874 seconds)

Published: Fri Mar 15 2024