impellor on blueband merc 50 cant split lower unit

[Dino89]

hi
helping brotherinlaw with old blue band 50 merc got all the bolts undone and the lower unit drops slightly but cant get apart is there anything up top that has to be released because it feels like its a postive stop not like its just stuck on crud build up ,or is it just a bit of gentle persuasion thats required.
the impellor is shagged so need to change it ,thought i saw a strip down guide on here last year with photos of merc ,but cant find it now any advice appreciated
thanx

[Nos4r2]

Nothing up top has to be released on the 50 bluebands. Has he remembered to undo the bolt under the trim tab anode?

Assuming he has then just wiggle it a lot and eventually it'll drop off.

[Richard B]

Originally Posted by Dino89

thought i saw a strip down guide on here last year with photos of merc ,but cant find it now any advice appreciated
thanx

I did this thread on my Yamaha Impeller change if this helps: Yamaha Impeller change

[jwalker]

Originally Posted by Dino89

hi
helping brotherinlaw with old blue band 50 merc got all the bolts undone and the lower unit drops slightly but cant get apart is there anything up top that has to be released because it feels like its a postive stop not like its just stuck

Did you disconnect the gearshift?

[Nos4r2]

Originally Posted by jwalker

Did you disconnect the gearshift?

You don't have to disconnect the gearshift on these motors it's a splined shaft that seperates when the leg drops.

[jwalker]

OK, how does that work? It must rotate to change gear, I guess.

[Dino89]

thanks for replies , will be looking again at weekend beleive all bolts have been removed so will double check! then try a bit of persausion
will post what occurs!!

[Nos4r2]

Originally Posted by jwalker

OK, how does that work? It must rotate to change gear, I guess.

Yeah, nice and simple. Can be a bit of a bugger to line back up though.

[gavin]

Jwalker is right the gear shift, is not the rotational drive splined shaft, its the gearcase drive, when the casing splits slightly, look in and open the screw coupling holding the gearshift, up and down rod together the coupling needs to be opened to let the unit drop off, watch for the seal and spacer on the top of the shaft as the unit comes away, they often fall off when dissambelling

[Nos4r2]

Originally Posted by gavin

Jwalker is right the gear shift, is not the rotational drive splined shaft, its the gearcase drive, when the casing splits slightly, look in and open the screw coupling holding the gearshift, up and down rod together the coupling needs to be opened to let the unit drop off, watch for the seal and spacer on the top of the shaft as the unit comes away, they often fall off when dissambelling

No, he's not. There is NO SCREW COUPLING ON THESE ENGINES. I OWN 2 OF THEM and have removed the lower units MANY TIMES.

This is what the lower unit looks like when it's off-the short splined shaft at the front of the unit is the gearchange shaft.