Beep when starting port engine

aero3113 · August 13

I get the normal beep on port and starboard engine when turning the keys to the on position. When I go to crank the port engine I get a beep and it goes away during the start. Does not do this on the starboard engine. I think this is new or just never noticed it. What do you guys think?

PickleRick · August 13

Isn't the beep during start up like a CEL on the dash of a vehicle, it activates for a split second upon start up then goes away? An indicator that the system is functional.

Perhaps I read this wrong

aero3113 · August 13

@PickleRick , on a Mercruiser I believe that test is when you turn the key to the on position not when you crank.

YYZRC · August 14

My boat has always done that. Never figured it out.

aero3113 · August 14

@YYZRC , just one engine like mine or do both of yours do it?

YYZRC · August 14

Just one engine. I tried swapping the starter batteries and it didn’t change anything. Hopefully you figure it out, it’s annoying!!

aero3113 · August 14

@YYZRC , I unplugged and looked at the connector for the water pressure sensor. There was some corrosion on the plug, I plugged it back in. Went to start the port engine and now no extra beep. I did change the fuel pressure regulator on the port side, thinking this could be my plug issue. Not sure if the water sensor or fuel pressure fixed it 🤷🏻‍♂️.

aero3113 · August 14

Not sure how this happened but could be the cause of my issue.

YYZRC · August 14

I think it would be odd for the water pressure sender to be the issue since the water pressure would be zero when starting the engine.

aero3113 · August 14

Is it possible it would know it wasn’t making a good connection, thinking it was a bad sensor?

YYZRC · August 14

I have full VesselView (not mobile) and it shows the water pressures. Mine are consistent between engines so I know my senders are good. Maybe I will swap them just for fun.

aero3113 · August 14

It’s possible it was my fuel pressure while cranking that caused the beep and the regulator cured it. But curious if it follows if you swap.

YYZRC · August 15

Is this the regulator in the cool fuel module? Does it just pull out?

aero3113 · August 15

Yes, 2 8mm bolts then it pulls right up.

YYZRC · August 15

Well, I just started her up and no extra beeps today (!!). Go figure.

aero3113 · August 15

That’s funny!
So you don’t monitor fuel pressure, Just fuel flow? Do Mercruiser even have fuel pressure sensors?

YYZRC · August 16

I don't think VV can output the fuel pressure. For sure its in the PCM but I don't have a scan tool.

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Beep when starting port engine

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