my 130202 is labelled 5hp..
(was tbh.. the sticker's gone by now
)
And afaik briggs are the only ones not listing hp any longer.. (they now only mention torque...and also exaggerate with that)
Honda Subaru KOhler etc.. all give a power rating and so do all chinese copies (rato, lifan ducar etc...)
Anyways...
in some downloaded (1989) 130200 manual I found this:
NOTE: Engine power will decrease by 3-1/2% for each
1000ft (305m) above sea level and 1% for each
10° F (5.6° C) above 60° F (16° C)
maybe an addendum for liability reasons *shrugs*
Anyways.. the 5horse I have is a beast.. not fast by any means (governor in place ZERO mods),
but when I got the kart it came with a rusty cent clutch and a crappy 4.8:1 gear ratio (11" wheels btw)
and it pulled me up a rather steep incline in the PO's driveway and while the clutch wasn't too happy about that
it did just fine....
the fresh out of the box true clone (6.5hp allegedly) doesn't have anything like that torque
(well it does on paper... but IRL... nope!)
So frankly.. whatever the paperwork claims isn't really important (to me anyways)
what the tiny little engine can do is what matters..
and a 5horse briggs is a great little engine no doubt about it.
for a fun kart it's all you'll need really.
'sid