MTD 78 Series User Manual

Crankshaft, piston and connecting rod
119
Engine torque values chart
Fastener Torque 78 83 90
Blower housing 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm)
Carburetor drain bolt 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm)
Carburetor mounting nuts 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm)
Connecting rod cap bolts 106-124 in-lbs. (12-14Nm) 106-124 in-lbs. (12-14Nm) 106-124 in-lbs. (12-14Nm)
Crank case cover bolts 195-221 in-lbs (22-25 Nm) 195-221 in-lbs (22-25 Nm) 195-221 in-lbs (22-25 Nm)
Drain plug 106 -124 in-lbs.(12-14Nm) 106 -124 in-lbs.(12-14Nm) 106 -124 in-lbs.(12-14Nm)
Flywheel nut 66-81 ft-lbs (90-110Nm) 66-81 ft-lbs (90-110Nm) 66-81 ft-lbs (90-110Nm)
Head bolt 38-41 ft-lbs step
(52-55 Nm)
38-41 ft-lbs step
(52-55 Nm)
38-41 ft-lbs step
(52-55 Nm)
Module 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm)
Muffler 159-195 in-lbs (18-22Nm) 159-195 in-lbs (18-22Nm) 159-195 in-lbs (18-22Nm)
Rocker jam nut 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm) 80-106 in-lbs (9-12 Nm)
Rocker stud 16-18 ft-lbs step
(22-25 Nm)
16-18 ft-lbs step
(22-25 Nm)
16-18 ft-lbs step
(22-25 Nm)
Spark plug 15-18 ft-lbs (20-25 Nm) 15-18 ft-lbs (20-25 Nm) 15-18 ft-lbs (20-25 Nm)
Starter (recoil) 53-71 in-lbs (6-8 Nm) 53-71 in-lbs (6-8 Nm) 53-71 in-lbs (6-8 Nm)
Starter (electric) 15-18 ft-lbs (20-25 Nm) 15-18 ft-lbs (20-25 Nm) 15-18 ft-lbs (20-25 Nm)
Valve cover 62-80 in-lbs (7-9 Nm) 62-80 in-lbs (7-9 Nm) 62-80 in-lbs (7-9 Nm)

MTD 78 Series Specifications

General

Brand	MTD
Model	78 Series
Category	Engine
Language	English