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PARTS-SERVICE
DATE: Sept. 20, 1984
MODEL: H60-110E
GRAM
H110-150F, S60-120E
Governor
SUBJECT: IMPROVED VELOCITY GOVERNOR
An improved velocity governor is now available for the G.M. 6-250 engine.
The following parts are required to change governors on the listed models.
P/N DESCRIPTION H110-150F H60-110E S60-120E
GAS LPG GAS LPG GAS LPG
355510 Governor X X X X X X
355505 Gasket X X X X X X
358369 Bracket* X X
358368 Tube* X X X X X X
181761 Bulk Hose X X X X X X
79511 Bulk Hose X X X X X X
17343 Hose Nipple X X X X
*These parts can be altered to fit.
INSTALLATION INSTRUCTIONS FOR H110-150F, GASOLINE AND L.P.G. EQUIPPED
1. Replace governor P/N 321732 with P/N 355510 governor.
2. Install with the governor speed adjustment towards engine valve cover.
3. If ignition distributor does not have vacuum advance, plug the  carb and  dist ports in governor with original
governor port plugs and omit steps 7-8-9 in these instructions.
4. Replace the throttle plate bracket, P/N 175318 with P/N 358369, or reuse the original by trimming away
any interference points.
5. Use gasket P/N 355505 between throttle plate bracket and governor.
6. Use gaskets supplied with governor, below the governor and above the throttle plate bracket.
7. Replace the vacuum advance tube P/N 321747 with tube P/N 358368, or reuse the original tube by
cutting 2.25 inches from the carburetor end.
8. Replace vacuum hose (to dist. line) P/iV 181442 with P/N 181082 hose by using 9 inches of bulk hose
P/N 181761.
We reserve the right to make changes in design or add improvements without incur-
ring the obligation to make such changes in equipment previously manufactured.
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9. Trim vacuum hose (carb to governor) P/N 190421 to fit, or replace with 12 inches bulk hose P/N
181761.
10. Replace the hose from governor vent tube to the carburetor air duct by using 16 inches of bulk hose P/N
79511. Trim to length as required.
INSTALLATION INSTRUCTIONS FOR H60-110E AND S60-120E, GASOLINE EQUIPPED
1. Replace governor P/N 321732 with P/N 355510 governor.
2. Install with the governor speed adjustment toward engine valve cover.
3. If engine distributor does not have vacuum advance, plug the  carb and  dist ports in governor with
original port plugs and omit steps 5-6-7 in these instructions.
4. Use gaskets supplied with governor.
5. Replace the vacuum advance tube P/N 321747 with tube P/N 358368, or reuse the original tube by cutting
2.25 inches from the carburetor end.
6. Replace vacuum hose (to dist. line) P/N 181442 with P/N 181082 by using 9 inches of bulk hose P/N
181761.
7. Trim vacuum hose (carb to governor) P/N 190421 to fit, or replace with 12 inches bulk hose P/N 181761.
8. On air inlet of S60-120E replace hose nipple, P/N 16746 with P/N 17343, 4 x 2 hose nipple. On air inlet
of H60-110E, replace nipple P/N 175347 with P/N 17343, 4 x 2 hose nipple.
9. Replace carburetor to air inlet hose P/N 296605 with 9 inches of bulk hose P/N 79511.
INSTALLATION INSTRUCTIONS FOR H60-110E and S60-120E L.P.G. EQUIPPED
1. Replace governor P/N 321732 with P/N 355510 governor.
2. Install with the governor speed adjustment toward engine valve cover.
3. If ignition distributor does not have vacuum advance plug the  carb and  dist ports in governor with
original port plugs and omit steps 5 and 6 in these instructions.
4. Use one of the two gaskets supplied with governor between governor and intake manifold. Use gasket P/N
355505 between governor and carburetor.
5. Replace the vacuum advance tube P/N 321747 with tube P/N 358368, or reuse the original tube by
cutting 2.25 inches from the carburetor end.
6. Replace the vacuum hoses to  dist and  carb ports on governor with two hoses, P/N 181442, which are
9 inches of bulk hose P/N 181761 each.
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7. Trim hose (governor to air inlet) P/N 193772 to fit, or replace with 10 inches of bulk hose P/N 79511.
ADJUSTMENT: Follow instructions included with governor, or use procedure on last page of this gram.
INTERCHANGEABILITY: Parts are directly interchangeable.
Parts stock: Use up
Effective S/N: C4D-
D5D-
D6D-
INSTRUCTIONS FOR ADJUSTING VELOCITY GOVERNOR Page 4
Service Notes:
I. Ensure that engine systems, mechanical, electrical and fuel are within serviceable limits and unit is at
operating temperatures.
II.
Tachometer should be accurate and compatible with ignition system. Ref. Parts Service Gram FF-21.
III. Air filter element should be clean and air filter connected to engine.
ADJUSTING SCREW (B)
ADJUSTING BUSHING (A)
IV.
R.P.M. Adjust*: Remove locking screw from adjusting bushing (A). Hold adjusting screw (B) stationary
and turn adjusting bushing (A) clockwise to increase engine R.P.M. and counterclockwise to lower engine
R.P.M. Set to service manual specifications. Replace locking screw in closest hole, recheck R.P.M. load
engine by using tilt function and check for engine surge. If okay, install lockwire.
V.
Governor Surges: To adjust R.P.M. fluctuation (surge) turn adjusting screw B 1/4 turn clockwise. Turn
adjusting bushing (A) counterclockwise to adjust no load governed R.P.M. Repeat until R.P.M. is stable.
VI.
NOTE: If governor control is not sharp enough it can cause too great a variation in engine R.P.M.
between load and no load. If this is encountered performance may be sharpened by turning adjusting
bushing (A) 1/4 turn clockwise. Then turn adjusting screw (B) counterclockwise to aajust no load
R.P.M. Repeat this procedure until performance is satisfactory. If surging develops return to previous
settings until governor stabilizes. Recheck and lockwire adjustment.
*Normally only adjustment required.