Ferris 23 Hp B&S Engine Vibration

[bertsmobile1]

I have found that threading with a standard tap makes for a loose fit if you are using the std self tappers
So I use my air ratchet to prethread the holes before fitting.
It is near impossible to push up hard enough to cut the threads when you are under the mower and there is nothing holding the engine down
also use nickel ( silver suff ) anti sieze to lube the hole
And always use NEW bolts
Old bolts are not sharp on the edges and may cause the mounting lug to split
Double ditto on not using a rattle gun I tried that with an old bolt and it split the lug as well
I normally put a 1/4" thick washer on the bolt so the thread is not fully pre cut so there is enough thread for the bolt to screw in and finish the last 1/4" during installation.

 

[Skippydiesel]

Ah! so you do the self tapping, before installing the engine - good plan.
Thanks for the tip on not using the old self tappers - thats exactly what I would have tried to do.

 

[bertsmobile1]

Te bolts are about $ 1 a piece from all of the aftermarket places like Stens, Rotary, Prime Line
Usually either one jug fractures ( not a problem 3 will work fine but 2 won't ) or one of the bolts breaks