Engine Machine Specialist

Mission Statement

Engine Machine takes great pride in building the best engine possible that will give our customers many years of dependable life. We want to share one, simple technique with you to keep your engine running for years to come.

Gas adjustment is one of the easiest, yet most crucial techniques to extend valve life. 

Gas Adjustment Procedure

(Non-Turbo Engines)

1. Before starting engine, set gas pressure at 5-6 oz coming out of the gas regulator. Increase gas –turn gas regulator clockwise. Decrease gas –turn gas regulator counter-clockwise
2. Start engine and slowly bring engine to desired speed (ex: 1800 rpm)
3. Go to gas regulator and slowly decrease gas until engine loses about 20 RPM. This is slightly lean of peak and our best engine life and economy.
4. Open throttle to regain lost RPM.

G8.9

Spark Plug:  41629 A/C

Spark Plug Gap:  .018

Valve lash:  Intake .016 / Exhaust .032

Filters: Luberfiner

Air:  LAF1863

Oil:  LFP3000

Water:  LFW4073

G3306

Spark Plug:  R43XLS A/C

Spark Plug Gap:  .018

Valve Lash:  Intake .016 / Exhaust .032

Filters:  Luberfiner

Air:  LAF1863

Oil:  LFP3191

Water:  LFW4073

G855

Spark Plug:  R43XLS A/C

Spark Plug Gap:  .018

Valve Lash:  Intake .016 / Exhaust .032

Filters:  Luberfiner

Air:  LAF1865

Oil:  LFP670

Water:  LFW4073

G3406

Spark Plug:  R43XLS A/C

Spark Plug Gap:  .018

Valve Lash:  Intake .016 / Exhaust .032

Filters:  Luberfiner

Air:  LAF1865

Oil:  LFP4005

Water:  LFW4073

1. Pull off all valve covers. Note: Front of engine is fan belt side. Cylinder #1 is at front.
2. Rotate engine until piston on #1 cylinder is a top dead center on compression stroke. There is a mark on accessory drive marked T/C. Cylinder #2 exhaust valve open.If not rotate engine 360 degrees.
3. Start counting rocker arms from front of engine going to the rear and adjust the following rocker arms. If it is an Engine Machine Engine they will be painted white.   (#1 .032)  (#2 .016)  (#3 .016)  (#5 .032)  (#7 .016)  (9 .032) For cross head adjustment, see below.
4. Rotate engine 360 degrees to place piston #6 cylinder at (TDC)  on the compression stroke. 
5. Start counting rocker arms from the back of the engine going to the front and adjust the following rocker arms: (#1 .032)  (#2 .016)  (#3 .016)  ( #5 .032)  (#7 .016)  (#9 .032).
6. When done adjusting valves, check all lock nut adjustments are tight 
7. Finally reinstall valve covers with new gaskets and o-rings for spark plug adapters.  

• Spark plug gap:  .018
• Intake valve clearance:  .015-.016 
• Exhaust valve clearance:  .030-.032

Cross Heads

Cross heads should be adjusted annually or when valve adjustments has changed considerably. To adjust crossheads, the rocker arm must be in sequence to be adjusted (loose). Loosen nut on cross head and back out adjusting screw. Now holding finger pressure down against cross head, adjust screw back down until just touching firmly on valve. This will be zero lash; No preload and no clearance. Hold adjuster screw with screw driver and tighten jam nut to 35 lbs.  Now adjust the rocker arm.

Engine Machine (EM) warrants our Remanufactured or Overhauled industrial engines to be free from defects in parts

and workmanship for a period of: 1 year from original invoice date or 6 months from start-up: whichever occurs first. Subject to the following provisions:

1. This warranty extends only to defects in parts and workmanship supplied by Engine Machine Failures caused by the operating environment or conditions are not warranted by Engine Machine. Exclusions from warranty includes but are not limited to: Over speed, overheating, lack of lubrication, damaged or engine failure resulting from detonation or pre-ignition, ingestion of dirt, poor quality natural gas, lack of valve adjustments, or other maintenance items.
2. Cylinder heads or valves are not covered by warranty.
3. Minor Oil leaks are not covered by warranty.
4. Repairs made under this warranty are only to be made by Engine Machine’s service department.Transportation of the engine to and from our location will be at the owner’s expense.
5. Engine outside our service area EM will supply replacement parts but will not pay labor. If it is a major failure engine will have to be returned to Engine Machine for repair in our shop.
6. Owner must notify EM within 5 days following the occurrence of any failure or other operational difficulty subject to this warranty. Failure to give such information will release EM from any liability under this warranty.
7. Excluded from this warranty is damage or failure caused or aggravated by the operation of engines or equipment after a failure or defect has occurred.
8. Excessive oil consumption as per manufactures specifications is: Over 2 gallons of oil used in a 24 hour period.
9. On all overhauled engines, any components reused are not covered by warranty.
10. All warranty repairs must be made during warranty period. They cannot be postponed until watering season is over.

Limitations:

EM will not pay warranty claim by outside service departments. Warranty covers repairs to engine only. Warranty does not provide for a replacement engine. Warranty repairs will be scheduled in with our normal service call rotation and will be handled on a first come, first serve basis. Repairs or replacements do not extend the term of this limited warranty. Warranty does not cover loss of usage of engine or loss of crop. Warranty does not cover any other components connected with this engine. There are no other warranties expressed or implied beyond this description.