Service Manual

8-3

Table of Contents

Inspection

Twin Cylinder Engine Service Manual

February 2017 - Digital Edition

ENGINE INSPECTION AND RECONDITIONING

Upper End Inspection and Reconditioning

Cylinder Head Cleaning Inspection

1. Remove the carbon deposits.

2. Clean the cylinder head of any remaining gasket material; intake, exhaust, valve cover and head gaskets.

3. Inspect the cylinder head for cracks, specically around the following (Figure 1):

-Spark plug threads (A)

-Valve seats (B)

-Exhaust Port (C)

-Intake Ports (D)

-Coolant Fins (E)

4. Inspect the cylinder head for warpage using a straight edge and feeler gauge. Measure and compare to specifi-

cations.

Cylinder Head

Service Limit 0.002 in.

5. Inspect the intake and exhaust ports mounting surface for warpage.

Figure 1