Service Manual
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Table of Contents
General
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
GENERAL SERVICE INFORMATION
Service Reminders:
1. Only use genuine Toro parts and lubrication products.
2. Always install new gaskets, o-rings and seals when reassembling.
3. Always torque fasteners to specication and follow recommended sequences.
4. Always lubricate friction components with clean engine oil or engine assembly lube when assembling the
engine.
Engine Model/Serial Number Location
The engine model and serial numbers are engraved into the crankcase (Figure 1). At the time of production, there
is a disposable paper tag located on the blower shroud, above the emission label.
Example of engine model and serial number:
127-XXXX
XXXXXXXXXXXX
Top Row: The seven digit number is the engine model number formatted three digits, a hyphen, then four digits.
Bottom Row: The 12 digits are the engine serial number, rst four digits are the date of the engine manufacturer,
two digit year, two digit month.
Engine Model and
Serial Number
Emission Label
Figure 1
Engine Model Number
Engine Serial Number