Excessive Power Loss (Above 10 kW) at Full Load

07.1-88071 Excessive Power Loss (above 10 kW) at Full Engine 601, 602, 603 Revised 10/88 7/88
Load

Note:
Engine does not shake at idle speed, no noises are noticeable, compression and cylinder leakage tests are within specification, fuel filter is not-plugged.

Cause:
Intake or exhaust valve spring is broken.

Remedy:
Replace valve spring.