INSPECT (Figure 6-5)

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MATERIALS/PARTS REQUIRED

TM-5-2010-205-14 Propelling Unit Outboard NSN 2010-01-251-2227 Manual

Figure 6-5. Camshaft Lobe

TM 5-2010-205-14

INSPECT (Figure 6-5).

1. Inspect camshaft lobes for pits or scuffing.

2. Inspect gears for damage.

NOTE

Camshaft bearing journals have a diameter of 2.4995 inch to 2.5005

inch and the minimum diameter worn is 2.4970 inch.

3. Inspect camshaft bearing journals.

4. Inspect camshaft lobe height by:

a. Measure lobe height (B) of one exhaust and one intake lobe.

b. Measure base circle (C) of one exhaust and one intake lobe.

Subtract base circle (C) dimension (Step b.) from lobe height (B) dimension (Step a.).

NOTE

Specified new lobe lift (A) is

.370 inch for exhaust lobe and

.367 inch for intake lobe.

d. The difference is actual lobe lift (A).

NOTE

Maximum permissible differences between actual lobe lift (A) and

specified lobe lift is .010 inch.

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