Need help with Johnson 3.5 hp outboard please

[ReefMagnet]

From memory, the impeller is held in place with a small plastic key. There should be a new key included with the replacement impeller. You should be able to jiggle the old impeller off relatively easily. Maybe try a squirt of wd40 or the like if it puts up a bit of a fight.

 

[gianenrico]

Yep, there is a new key with the new impeller; so I'll try and wiggle/jiggle the old one out.
A beer on me down under this evening!

 

[gianenrico]

Mmhh, let's make it a six-pacK!!
Job done!
I actually had to cut the old impeller along the shaft: I feared that inserting a scrw driver between impeller and base plate of the pump may damage the latter.

The original is rubber over plastic, the new one rubber over metal ; the key is the same so no prob.

TKS again for the help.

 

[gianenrico]

Just to keep You informed: this summer the clutch did seize and I had it fixed by a mechanician.
Unfortunatly who carried the engine to ne in Corsica, had it upside-down for three days.
Strating the engine (which have allways been a "first pull go!") become erratic and, worse, there was a small but constant peeing of fuel from the carb.
Last month I dismounted the carburettor and found:
a dried out carb gasket,
a cup full of metallic powder (which probably was distributed to any and all small hole in the carb),
a small pin seized by some of the same powder.

Cleaned ans changed the gasket, reassembled everything at its place, now it works again as a swiss watch!