Starting a Yanmar diesel

[Dave]

1 cylinder Yanmar, 9 hp - Instructions say to turn on key, wait until light and buzzer turn Off, then push Start button. However, the buzzer and light did not want to go Off so after a minute or so I pushed the Start button and she started up. Does anyone wait until the buzzer turns Off?

 

[Bill Thiers]

Mine's the reverse

My buzzer comes on (sometimes with a delay), at which point I press the start button. Per the manual. 20 HP 3 cylinder 3GMF.

 

[Miles]

You'd be waiting a LONG time...

I think the buzzer you're talking about is the oil pressure low warning buzzer. It will normally be going off when you have the key on but the engine isn't running since there won't be any oil pressure. Once you start the engine it pressurizes the oil via the oil pump and the buzzer goes off. Unless you've got some sort of external electric oil pump I'd just push the start button and the buzzer should go off in a few secs...

 

[Andy]

It is the same for us.

I too questioned the inconsistancey between the manual and the real world. Our 82 H27 functions as you describe. There seems to be no harmful effect/affect. Andys/v Baroque

 

[David Foster]

And us

We just crank away.David

 

[Dave]

Thanks from Dave about Yanmar buzzin

Thanks to David, Andy, Miles, and Bill -I think Miles is on target as to the root cause of my minor problem. The writer of the manual didn't describe it correctly. The buzzer and Low Oil Pressure light do go Off when she starts up. On a more pleasant note - My first sail in my 27 Hunter ('82) was last Saturday on L.I. Sound - beautiful day with sun and maybe a 10 knot wind - we sailed out from Cedar Island Marina and around the 8C buoy - great sail, great boat, (left a new Hunter 290 and a couple of others in our wake!)

 

[Buck Harrison]

Starting a Diesel

If you guys turn the key on, then press the start button and, at the same time, hold the kill switch, the engine will crank (without starting) and the low oil pressure warning buzzer should go off within 5-10 seconds. THEN release the kill switch. The engine will start.But by doing it this way, you have just pre-lubed your engine... this is good.You only need to pre-lube the engine this way if it has not been run within the past (approx) 48 hours; and when you do pre-lub this way, make sure to close your engine raw water intake thru-hull, while cranking with the kill switch engaged, to prevent (raw) water from backing up in the exhaust manifold and potentially getting into the cylinder. DON'T FORGET to open the intake thru-hull once the engine starts, or you will burn up the raw water impeller....