Series 60 – STARTING DIFFICULTY – ENGINE ROTATES – LOW CRANKING SPEED

To determine if low cranking speed is causing starting difficulty, perform the following steps:
1. Install a tachometer to the engine.
2. Record engine revolution while cranking the engine; refer to OEM for guidelines.
[a] If the cranking speed is greater than 100 rpm, check the fuel supply valve;
refer to section 4.7.
[b] If the cranking speed is less than 100 rpm; refer to section 4.6.1.

4.6.1
Low Cranking Speed Repair
Perform the following steps for low cranking speed repair:
1. Drain the engine oil; refer to the appropriate service manual, preventive maintenance engine chapter.
2. Remove oil filter(s); refer to the appropriate service manual, preventive maintenance chapter.
3. Install new oil filter(s); refer to the appropriate service manual, preventive maintenance chapter.
4. Refill the lubrication system with new oil; refer to the appropriate service manual, preventive maintenance chapter.
5. Verify low cranking speed repair; refer to section 4.6.1.1.

4.6.1.1
Test Engine with Replaced Oil
To determine if the replaced oil resolved starting difficulty, attempt to start and run the engine.
1. If the engine starts and runs, no further troubleshooting is required. Shut down the engine.
2. If the engine fails to start and run, check the fuel supply valve; refer to section 4.7.

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