Generac Power Systems TXP User Manual

Page 7

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Spark Plug Gap.................................................................................... .............................................. 0.030"

Crankshaft End Play............................................................................................... ........ 0.002"-0.008"

Governed Idle Speed Adjustment............................................................................................... 1400 rpm*

Valve Clearance (with springs installed)................................................................Intake .005"-. 007"

Exhaust .007"-.009"

Valve Seat Angle...........................................................................................................Intake - .30

Exhaust - 45

Valve Seat.Width.................................................................................................................. 3/64"- 1/16’

Valve Seat Margin................................................................................................Not less than 1/64'

Valve Clearance (springs not installed).,...............................................................Intake .007"-.009'

Exhaust ,009"-.Oil'

Crankshaft Reject Sizes.........................................................................................PTO Journal 1.376'

Crankpins 1.622'

Cylinder Boi'e Standard Diameter......................................... ................ .......................... ..... 3.4375**

Ring Gap Reject Sizes (Top and center compression)...................................................................... 0.035'

(oil Ring)................................................................................ .......0.045'

Ring to Ring Groove Maximum Clearance........................................................................................ 0.007'

Maximum Piston

Pin Out-of-Roundness....................................................................................,0,0005'

Crankpin Bearing Hole Rejection Size...........................................................................................1.252'

Piston Pin Bearing Hole Rejection Size...;,.......................................................,,,,.,.,,.....0,802'

Camshaft Rejection Sizes (Gear and. Shaft Journals).......................................................................0,623'

(Cam Lobes)......................................................................... 1.124'

Cylinder

Bore Maximum Out-of-Roundness,.............. ...........................................................0,0025'

0,010" above standard

Cylinder Bore Oversizes when honing.......................................................... 0.020" above standard

0.030" above standard

E N G I N E S P E C I F I C A T I O N S

*Adjust carburetor idle screw to 900 rpm

**Resize if worn 0.003" or more

1.4

Issued 6-78