2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 303Get this manual
ii) LOW OIL PRESSURE WARNING CONTROL If the oil pressure dropped to 49 kPa (0.5 kgfcm2, psi), the CDI unit starts immediately misfiring to limit the engine to approximately 2,000 RPM, and lights the low oil pressure warning indicator (red LED)The low oil pressure control can activate under the following conditionAfter 10 seconds elapsed after the engine has startedAND While the engine is operated at 2,000 rpm and overThe low oil pressure control will be cleared under the following conditionThe oil pressure switch became OFFAND The engine has stopped iii) OVERHEAT WARNING CONTROL If the engine temperature exceeds 80C (176F), the CDI unit starts immediately misfiring to limit the engine to approximately 2,000 RPM, and lights the overheat warning indicator (red LED)The overheat control can activate under the following conditionAfter 120 seconds elapsed after the engine has startedOR After 25 seconds elapsed while the engine is operated at 2,000 rpm and overThe overheat control will be cleared under the following conditionThe overheat switch became OFFAND The engine speed has dropped to 1,200 rpm and belowThe overheat switch can become OFF when the engine temperature dropped to 70C (158F) once the switch was ON80C (176F) 70C (158F) ON OFF