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Yamaha Outboard Technician Study Guide
1. What are the last two digits of the Yamaha part number?
The paint code
2. What are anodes?
High-grade alloys used to control and minimize the effects of saltwater
3. What number is used to register an outboard?
The PID
4. When does Yamaha recommend using a water pressure gauge?
When the anti-ventilation plate is positioned above the bottom of the boat
5. What is the recommended battery type for Yamaha?
Marine cranking batteries or lead-acid batteries
6. According to Yamaha, what is the most important gauge?
The tachometer
7. What is the break-in oil mixture ratio?
25:1
8. The PBS oil pump is driven by what?
A brass worm gear that is mounted on the crankshaft
9. What is the purpose of the trim position sensor?
It prevents automatic oil transfer to the engine oil tank if the engine is trimmed beyond
30°
10. The SMART system allows what?
Oil transfer only when the engine is running (except for initial service)
11. What type of ignition system is used on Yamaha 70HP engines?
CDI ignition