Service Manual
8-15
Table of Contents
Inspection
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
ENGINE INSPECTION AND RECONDITIONING
Lower End Inspection and Reconditioning (Cont.)
Crankcase (Cont.)
2. Recondition the cylinder bore:
- Hone cylinder bore to obtain crosshatch
- Clean bore after honing with hot soapy water
- Remeasure bore to specication in previous step (1c above).
3. Clean and remove all gasket material. Inspect all gasket surfaces for nicks and deep scratches.
4. Inspect the upper crankshaft bearing.
- Remove and discard the upper crankshaft oil seal.
- Inspect for surface wear, pitting and scratches.
- Measure and compare to specifications.
Crankshaft Hole Diameter
Standard (Height) 1.5751-1.5758 in. (40.009-40.025 mm)
Service Limit 1.5778 in. (40.075 mm)
5. Inspect the upper camshaft bearing.
- Inspect for surface wear, pitting and scratches.
- Measure and compare to specications.
- Inspect upper camshaft bearing.
Camshaft Hole Diameter
Standard (Height) 0.6299-0.6303 in. (16.0-16.018 mm)
Service Limit 0.6326 in. (16.068 mm)
6. Inspect and clean oil lubrication passage to upper crankcase bearing (Figure 14).
NOTE: Replace complete engine assembly if any issues are found with the crankcase assembly.
Figure 14