Briggs & Stratton 6388-00, Operator'S Manual

Horizontal Fan

Vertical Fan

Figure 3

E

D

Figure 4

F

Figure 5

G

Paint too fine

Correct

Paint too coarse

Pattern Consistency (Atomization)

Figure 6

6-12 in.

Figure 7

5

NOTE

   The fluid adjustment knob (G) can be adjusted 

either clockwise or counterclockwise to finely adjust 

pattern consistency. Before spraying on workpiece, 

practice a few minutes on a cardboard target to ensure that 

the pattern size and consistency are set correctly.

NOTE

   During normal use, the air cap (D) is adjusted to be 

horizontal. This provides a vertical fan-shaped pattern 

which gives maximum and even material coverage as the 

gun is moved back and forth parallel to the surface being 

finished.

NOTE

   Always keep spray gun (A) moving parallel to the 

surface being covered while spraying. Stopping gun move-

ment in mid-stroke will cause a build-up of paint and will 

result in runs. Do not fan the gun from side to side while 

painting. This will cause a build-up of paint in the center of 

stroke and an insufficient coating at each end. (See Figure 8)

●

 Test the consistency of the paint by making a few strokes 

on a cardboard target. If paint still appears too thick, add a 

small amount of thinner. Do not exceed paint manufac-

turer's thinning recommendations.

1. Adjust the direction of air cap (D) to be either horizontal or 

vertical as required by loosening air cap ring (E) 90 

degrees with hand. Hand tighten the air cap ring (E) after 

adjustment. (See Figure 3)

2. Set pattern size for desired shape. For full pattern, open 

spray pattern adjustment knob (F) counterclockwise. For a 

round pattern, turn spray pattern adjustment knob (F) 

clockwise. (See Figure 4)

3. Turn the fluid adjustment knob (G) fully clockwise until 

closed. (See Figure 5)

4. Holding the gun 6-12 in. away from workpiece depending 

on material and atomizing pressure, spray a short burst 

while turning the fluid adjustment knob (G) until desired 

pattern/atomization is obtained. If the spray is too fine, 

    which is caused by too much air from amount of paint 

being sprayed, reduce the air pressure or open the fluid 

adjustment knob (G) more to spray more paint. If the spray 

is too coarse/spitting blobs, reduce the amount of paint 

with the fluid adjustment knob (G) or thin the paint more. 

    (See Figure 6)

5. Keep spray gun (A) at the right angle of 90 degrees to the 

surface being covered while spraying. (See Figure 7)

Thin coat

Heavy coat

Thin coat

INCORRECT

Figure 8

Not 

for 

Reproduction