Ariadne
Well-Known Member
I know its been covered here many times, and all the info tells you that it its a big job and involves taking half the engine apart. I also know its a bad engine 'cos I have one!
But changing the the impeller is easy. So if you have one of these things and its only blowing hot steam from the piddle hole don't worry, its a simple job.
The inpellers are cheap and reasonably easy to get hold of.
Put the engine on suitable bracket and tilt it up as far as it will go, you should now have good access to the bottom of the shaft. Look under the shaft, above the prop' and you should see 2 x 12mm bolts, undo these and place in a box (you'll need these to put it back together again).
After you've drawn the bolts, locate the rubber plug half way up the shaft and remove it. Loosen the nut holding the gear shift bars, but don't remove the clamp as its a bit of a bugger to re-locate insitu. The clamp nut has been known to sheer off, so don't be supprised if it does. Then ease the whole assembly (gearbox and prop) off the shaft.
On the top of the gearbox you'll see 4 nuts & washers, remove these (put them safe) and ease the impeller cover off. Take care not to loose the half-moon key on the shaft!
Make a note of the direction the impeller is turning, clean up the area and fit the new impeller.
Re-assemble in reverse order. Make sure the gear shift bars are linned up and the shift works, you may have to play about a bit to make sure it goes from ahead to astern nice and easy before nipping up the nut.
Thats it folks, its as easy as that.
PS
Take the opportunity to do a complete service at this time as well, its worth it. My engine is working again now after many months of frustration and anger. /forums/images/graemlins/smirk.gif
But changing the the impeller is easy. So if you have one of these things and its only blowing hot steam from the piddle hole don't worry, its a simple job.
The inpellers are cheap and reasonably easy to get hold of.
Put the engine on suitable bracket and tilt it up as far as it will go, you should now have good access to the bottom of the shaft. Look under the shaft, above the prop' and you should see 2 x 12mm bolts, undo these and place in a box (you'll need these to put it back together again).
After you've drawn the bolts, locate the rubber plug half way up the shaft and remove it. Loosen the nut holding the gear shift bars, but don't remove the clamp as its a bit of a bugger to re-locate insitu. The clamp nut has been known to sheer off, so don't be supprised if it does. Then ease the whole assembly (gearbox and prop) off the shaft.
On the top of the gearbox you'll see 4 nuts & washers, remove these (put them safe) and ease the impeller cover off. Take care not to loose the half-moon key on the shaft!
Make a note of the direction the impeller is turning, clean up the area and fit the new impeller.
Re-assemble in reverse order. Make sure the gear shift bars are linned up and the shift works, you may have to play about a bit to make sure it goes from ahead to astern nice and easy before nipping up the nut.
Thats it folks, its as easy as that.
PS
Take the opportunity to do a complete service at this time as well, its worth it. My engine is working again now after many months of frustration and anger. /forums/images/graemlins/smirk.gif
