Briggs and Stratton engines

[Potash123 26]

I have been told by a second hand lawn mower engineer that all the smaller B & S engines are interchangeable and have the same drive shaft fittings. Any views would be appreciated.  

[nigel 1,877]

You have been told right

[pmackellow 2,738]

Thanks chaps, that's worth knowing

[Potash123 26]

Thanks Nigel. I am thinking of upgrading the Hayterette. I have the aluminium disc with four small blades. Is the drive connection to this disc hard to split. Did not want to start a new thread on this as there are

so many members on this section. Thanks lads.

[nigel 1,877]

you might have a problem there geting it off alloy against steel dont mix, some times your lucky some times your not, i have had to cut the boss off in the past

[Wristpin 400]

Don't recall the Hayterette as having an alloy disc, normally steel. However they can fight. With the retaining bolt removed there is a thread in the disc to take a puller bolt or more correctly a " pusher" bolt to force the disc off but if the disc has fought in the past that thread is probably stripped . It's then a question of drilling two holes in the disc just clear of the boss and fabricating a puller .

if the crankshaft oil seal has been leaking you may be in luck and be able to draw the disc off without too much of a fight  but if not it will need a lot of heat on the boss while protecting the sump with a pile of soaking wet rags. To get sufficient heat into the boss you really need oxy- acetylene .

Should say, remove the fuel tank before you start!

[Bronzegreen 7]

As Wristpin said 

I've not seen an alloy disk on the hayterette only pressed steel 

the 21 and osprey had alloy disks