After 3 days of farting about something rotton, i've finaly got my generator
starting, running and making power reliably.

You may recall i've got a briggs and stratton 3.5 horsey vertical shaft
lawnmower engine driving a 70 amp alternator, my cordless battery charger.

where it's mounted i can't get at the fuel tank on top of the engine, and
dont want to run it on petrol anyway, i cary enough fuels on board as it is
(diesel, bio-diesel, lpg and parafin)
and as i had a redundant gas line going right past the generator, i
converted the engine to run on gas.

Got a gerretron low pressure fuel regulator, and found out they dont do a
carb mounted mixer for this engine, all i could get was a 'spud' pipe in the
carb mouth thin.

Well that spud was absolute crap, the engine was way down on power, it'd
stall before the alternator hit 50 amps, on petrol it would max out the
alternator and still run, starting was hit and miss, half the time miss, it
was surging, bogging down, would only start on full throttle, and had to
come up to speed for 5 seconds before it'd stabilize.

I'd tried the spud in all sorts of positions, right in the carb, right out,
and all ways inbetween, in the air filter box, blocked up the engine
breather pipe to the carb, everything, and it just wasnt happy on the damn
thing.

I knew the americans convert small engines differently, they pull out the
main jet and emulsion tube and screw a gas pipe up there, so the carby is
turned into a gas carb.

So in desperation i thought i'd try that, unbolted the float bowl, pulled
the emulsion tube out, and i had to drill the carb out to accept the spud
fitting, no worry's as the engine will never run on petrol again anyway,

screwed the spud up into the carb so it's ejecting gas where the petrol
should be ejected, just after the venturi.

Put it back together, operated the starter and she fired up straight away, i
found out i dont need half the restrictions i'd put on the air intake now,
it's still pretty sensative to the air intake, but no where near as fussy as
it was before,

i adjusted the mix for best running, and she was running faster than before,

Tried a full power test, turned the inverter on, ran the microwave.. that
pulls 90 amps from the batteries, so the 70 amp alternator will max out, and
the engine stayed running... woohoo, that's something that just wasnt
possible before with the spud in the intake.

shut the load off, and knocked the engine to idle, was running a bit fast,
but before the damn thing wouldent idle well, i managed to knock the idle
speed right down to a barely audiable engine sound, and she stayed ticking
over.

shut the engine down, she wont start up with the throttle on idle, but
quarter throttle and she will fire straight up,

So at last, i can stop pulling my hair out and wishing i'd never heard of
lpg, the darn thing is working.

So if you have a briggs and stratton engine you want to convert to lpg, get
a spud, but shove it in the bottom of the carb, effectively turning the carb
into a lpg carb, it works so much better than trying to get the gas into the
air flow before the venturi,
i origionaly wanted the adaptor that let me put the gas in that way, but no
ones heard of it in england, they all use mixers on the end of the carb...
if there's one made for your engine that is.