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yes I’ll get those pics, how can you tell it’s the larger diameter?

Oops I just read through the rest of these posts and saw that you said earlier the old sn couplers had a smaller thread diameter. That must be what the problem is, I think I'll just try to plug that hole somehow rather than buying an entire assembly.

Here's a picture of the housing and a pic of the splines that you recommended posting here before I grease them.

My new coupler came in so I removed the midshaft and when I went to put the new coupler on it is to big (large of a diameter to screw onto the shaft). The midshaft housing says 63M on it and from what I can tell after looking online that is out of a wave raider or wave venture. So I am assuming...

Oh sorry one last question, do you know if it’s possible to get the mid shaft assembaly out with just moving the engine forward a few inches or does the engine need to come out? -thanks for all your help

Will do thanks, now off to find those parts

Sorry I’m not sure what you mean when you say “op”. So sounds like what I need to do is take the entire assembaly with housing off, replace the o rings and coupler with an updated one, grease the splines, then put it back in?

Ok, so coupler half as in put a new coupler half in the old housing which is what is not easy? And if that’s the case would it be easier to just find the entire assembaly with the housing and replace that? Thanks

Sorry so what you’re saying is I just need to replace it with a newer coupler? Or are you saying I should replace those o rings and put new grease on the splines? Or both? And if so can you do it by just pulling off the mid shaft and housing? Sorry I’m pretty clueless about this I’ve never...

I tried pulling that housing off once, I took off the three bolts but it wouldn't budge, is there something else I'm missing to take it off or do they just get stuck on there pretty good?

I filled the hull with water and it was dripping out pretty quickly where the drive shaft goes into the hull, I’m gonna assume that this means that hole in the coupler needs to be plugged. I just don’t know if they make a part for it or if I have to jerry-rig it

I will try that, do I need to worry about water wrecking anything?

Maybe but the hull is lined with carbon kevlar so it seems unlikely

I could try, but the engine is in right now so I was thinking if I could just disconnect the exhaust and remove the gas tank I could move the engine forward a couple inches just to plug that hole without taking the engine out and hopefully solve the problem. I'm just not sure how to plug it

I've had my superjet for a long time now and it's always leaked in water. I have never been able to figure out where the leak is so I've always just ran the bilge pump while riding. Now it's time to sell so I need to figure this out. I think I have an idea, attached is a picture of a hole in the...

Cool I'll give that a shot, thanks

Thanks, do you happen to know if I can buy one on its own or if I need a whole new coupler?

I am wondering if there is something that goes in the circle hole in the drive coupler in the picture which I am missing that is causing my ski to leak in water. It only leaks when it's running and I don't beleive its a leaky water line, any help would be greatly appreciated. Thanks

If there is a way for you to scan that manual that would be awesome. Ill also look and see what can find online.

Minnesota