The Honda GX390 shares the same dimensions with the GX340. If you need more power
from your machine, swapping out a GX340 for a GX390 is an easy install.

Industrial Use
11.7 HP at 3600 rpm
19.5 ft lb torque at 2500 rpm
389 cc
69 pounds
6.4 quart gas tank
Dual element air cleaner
Electric & Rope Start Available

Most common specs:
E Type Tapered shaft (metric)
H Type reduction pto (1" gear reduction)
L Type reduction pto (25mm metric gear reduction)
P Type threaded pto (SAE) 1-14" (some water pumps)
Q Type 1" straight shaft (most common)
R Type reduction pto (22mm gear reduction)
V type tapered shaft (some generators sets)

Give us a call at 480-838-7472 We stock replacement GX390 engines for airless paint
sprayers, water pumps, generators, plate tamps, Honda power equipment. We can
supply replacement engines for Wacker, MultiQuip, Atlas Copco and others.

Our address is
412 W Gemini Dr
Tempe, AZ 85283