 Might as well do a little video. So for an impeller change on an old Yanmar 15 like this one QM I think this one is if I remember correctly the the pump sits like sits like this on these bolts And to get to the impeller you got to take the pump off to get to the back there to open it up So you know you don't even get an advantage from having a speed seal plate on it because you've got to take the pump off Anyway, just to get to the back Obviously on modern designs. They've Reversed it so that you can you can open the the seal without taking the pump off, but you know 1980 90s late 70s this engine so Let's continue and as I suspected the impeller is fine So it's just the inlet which is a bit crusted up, which is why it doesn't quite get enough water all the time But I think I might change this impeller anyway I'll just check. I mean I've got plenty of spares. I'm just not quite sure if I've got the right one. Let's have a look Yeah, I've got four spare Impellers and they're all the right ones But I really don't think I need to change this because it's in perfect condition. There's no cracking on any of the arms I'm gonna leave it But you know at least we've had a look Think I've got a seal to go around there. Let me just check All cleaned up with some wire wool got a new paper gasket for it. So now let's try and get it on without ripping the gasket There we go. All done. Now, of course the way to tighten these is Opposite opposite opposite like you would on a car wheel and the torque spec is you tighten them up until one of them Shears and then you back the others off half a turn Perfect. I just got to fit it back on the engine Use the lugs on the engine to mount the pump so that when you attach the pipe It's in the right orientation and you don't end up because if you if you attach the pipe or the pumps not on the engine You might have it twisted, but you don't want so very easy Just put it in the right place first then attach the two pipes then take it off Put the belt round and then put it back on Now before I put the pump back on I'm going to take this opportunity where I've got a bit better access To just take the strainer out of there check that it's clean And maybe poke something down and see if I can de-crust the inlet pipe a little bit So this is the strainer which goes inside that body there Can you see? There we go. Yeah So this strainer goes inside that body there So all the water that comes up comes up the inside of this and then into the engine and You know, that's not bad. There's hardly anything in there. So I'll give it a quick wash and a rinse And then I'll poke something down the floor So it's all back together Pump is back on belt tightened Now I do have a problem. This is a pencil anode into the engine There's one on the back as well, and I checked them two years ago And they were fine But I obviously tightened it up too much because I can't get it off And I tried some percussive engineering, but that did not work either I don't want to bash it too hard So I'm going to wait Until I get back to Valencia having run the engine for some time getting in It'll be hot then And I'll try and take them off when the engine's hot. I'm also going to do the oil change then as well But you know 19 this stop making these engines in 1980. So it's at least What's that for 30? It's very old