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SERIES 50 LOW CRANKING SPEED

To determine if low cranking speed is causing starting difficulty, perform the following steps: ‪

  1. Install a tachometer to the engine and record engine revolution while cranking the engine; refer to OEM for guidelines.
    1. If the cranking speed is greater than 100 r/min, check the fuel supply valve; refer to Section .
    2. If the cranking speed is less than 100 r/min; refer to Section .

Low Cranking Speed Repair

Perform the following for low cranking speed repair: ‪

  1. Drain the engine oil. Refer to Section .
  2. Remove oil filter(s); refer to Section .
  3. Install new oil filter(s); refer to Section .
  4. Refill the lubrication system with new oil; refer to Section .
  5. Verify low cranking speed repair; refer to Section .
Test Engine with Replaced Oil

Perform the following to determine if the replaced oil resolved starting difficulty: ‪

  1. Attempt to start and run the engine.
    1. If the engine starts and runs, no further troubleshooting is required. Shut the engine down.
    2. If the engine fails to start and run, check the fuel supply valve; refer to Section .