Engine Alarm--"Check Engine"

[hal4cal]

I have a ranger 27 with the standard Yanmar 4BY2-180 engine. It has been running beautifully until the last time out when the engine warning light came on (accompanied by the ear-piercing audio alarm) at 4000 RPM. Oil pressure seemed normal at 73 PSI as did engine temperature at 197 F. The engine sounded fine and there was no obvious signs of any distress. I throttled back, shut the engine down and restarted it. The warning light did not go back on until I again reached 4000 RPM. All guages were normal and there was no evidence of distress. I repeated this procedure a few times and everytime I hit 4000 RPM the alarm mysteriously went off. The only message on the engine data screen was "check engine". Any ideas, thoughts or suggestions would be appreciated.

Hal Teasdale
Tug-a-Bear

 

[John Shea Jr.]

I had the same problem. I contacted my Dealer, Winter Island Yacht sales and he sent a technician to read the trouble codes. The info was forwarded to the regional YANMAR service provider. The service center dispatched a technician who replaced a defective sensor. In my case there were three items on the engine that gave the same alarm code. Of course, the third and hardest to reach sensor was the defective one. The issue was completely covered by the warranty. Good luck and I hope this helps.

 

[knotflying]

Although it may not be the same problem I have had an alarm a few times for the same thing; check your hose running to the waste gate. Mine keeps coming off and I get the alarm. The hose is a 3/8 inch OD hose and if you look under your Air filter that is where it connects. The clamps are those squeeze clamps and the barb on the connection is small so they don't hold on well. When I get a chance I am going to get a screw clamp and put a little gasket seal on to hold it in place.
I hope this helps!
Mike

 

[Kenny Marrs]

Hello Hal,

John is correct. I would have a Yanmar technician come hook up a computer to the engine to read the alarm/code. Any alarm that goes off will be stored in the engines memory.

-Kenny