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| Home / Engines / Kohler Engines / Kohler M18 |
Kohler Magnum M18 Maintenance
| Engine Model: Kohler Magnum M18/M18S |
| Engine Type: 4-cycle twin-cylinder horizontal shaft gasoline engine |
| Total Displacement: 42.2 cu.in (691.3 cc) |
| Rated Engine Power: 18 Hp (13.4 kW) at 3600 rpm |
| Fuel System: Kohler or Walbro carburetor with adjustable jet or fixed jet |
| Engine Oil and Filters |
Engine Oil Type (Summer Time) .............. SAE 10W-30
Engine Oil Type (Winter Time) .............. SAE 5W-20, 5W-30
Oil Classification .............. API Service SG, SH, SJ, or higher
Oil Capacity (without filter), L (qts) .............. 1.6 (1.7)
Oil Capacity (with filter), L (qts) .............. 1.4 (1.5)
Air Filter Element Part Number .............. 45 083 02-S
Air Filter Pre-Cleaner Part Number .............. 45 083 01-S
Engine Oil Filter Part Number .............. 52 050 02-S
Engine Fuel Filter Part Number .............. 25 050 07-S
| Carburetor Adjustments |
Main Fuel (Kohler Carb) .............. 2-1/2 turns
Main Fuel (Walbro Carb) .............. 1-1/4 turns
Low Idle (Kohler Carb) .............. 1 turn
Low Idle (Walbro Carb) .............. 1-1/4 turns
Low Idle Speed, rpm .............. 1200±75
High Idle Speed, rpm .............. 3600±50
| Ignition System |
Spark Plug Type .............. Champion RV17YC
Spark Plug Gap, mm (in) .............. 0.89 (0.035)
Module Air Gap, mm (in) .............. 0.2-0.3 (0.008-0.012)
Spark Plug Torque, Nm (ft-lb) .............. 13.5-20.3 (10-15)
| Service Intervals |
Service Precleaner Element .............. Every 25 hours
Clean Cooling Areas .............. Every 50 hours
Change Engine Oil .............. Every 50 hours
Replace Oil Filter .............. Every 50 hours
Replace Air Cleaner Element .............. Every 100 hours
Check Spark Plug Gap .............. Every 100 hours
Change Oil Filter .............. Every 200 hours
Replace Fuel Filter .............. Every 200 hours
Check Carburetor Adjustment .............. Every 200 hours
Check and Adjust Valve Clearance .............. Every 500 hours
Replace Spark Plug .............. Every 500 hours
| Tightening Torque Specs |
Cylinder Head, Nm (ft-lb) .............. 20.3-27.1 (15-20)
Connecting Rods (New), Nm (ft-lb) .............. 15.8 (11.7)
Connecting Rods (Used), Nm (ft-lb) .............. 11.2 (8.3)
Flywheel Screw, Nm (ft-lb) .............. 54.0 (40.0)
Manifold Screw/Nut, Nm (ft-lb) .............. 16.9 (12.5)
Fuel Pump Mounting Screws, Nm (ft-lb) .............. 4.2-5.1 (3.1-3.8)
Ignition Module, Nm (ft-lb) .............. 3.6 (2.7)
Spark Plugs, Nm (ft-lb) .............. 13.5-20.3 (10-15)
Oil Filter, Nm (ft-lb) .............. 5.7-9.1 (4.2-6.7)
Closure Plate, Nm (ft-lb) .............. 16.9 (12.5)
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| Engines Technical Specifications |