Miller Big Blue 400D, Owner'S Manual

Page: 35 / 68

OM-463 Page 31
7-5. Adjusting Engine Speed
ST-045 768-B
Engine speed is factory set and
should not require adjustment. Af-
ter tuning engine, check engine
speed with tachometer. See table
for proper no load speed. If neces-
sary, adjust speed as follows:
1 Plastic Cap
2 High Speed Stop Screw
3 Lock Nut
Remove plastic cap from screw.
Loosen nut. Turn screw out (toward
front of engine) several turns.
4 Linkage
5 Lock Nuts
Loosen nuts. Start engine and
move linkage until engine runs at
weld/power speed. Tighten nuts.
Stop engine.
6 Speed Control Lever
Turn screw in until screw touches
lever. Tighten lock nut on screw and
reinstall plastic cap.
Close side door.
1
3/8 in
2 4 3
5
Right Side
6
RPM
1850
Tools Needed:
Engine
Speed
(No Load)
Weld/Power
7-6. Servicing Optional Ether Starting Aid
ether2 7/96 − ST-153 382-A / Ref. ST-180 933-B / S-0692
Stop engine.
Improper handling or expo-
sure to ether can harm your
health. Follow manufactur-
er’s safety instructions on
cylinder.
If engine does not start in cold
weather, check ether cylinder as
follows:
Remove cylinder from valve.
1 Ether Cylinder
2 Valve
3 Scale
Weigh cylinder to see if it is empty.
Be sure atomizer is not plugged and
valve fitting is clean.
Replace cylinder according to
Section 4-7.
1
2
15 oz 33 oz
(935 g) (425 g)
3
Full Empty