Mercruiser 8.1 Help.
 

We own an Epic V23 boat that has a mercruiser 8.1 motor.

Apparently no one can help me .. Ive called multiple people in multiple locations.

I found this forum doing research.



When I hook up the computer the error codes I get are the following



Fuel LVL2 CKT H

5VDC pwr 2 L

We have been trying to get this boat to work for 3 months!!!!!!!!!! and Ive had it, i need to figure it out. Can you pleaseeee help me??!

The boat starts fine, when we take it out as soon as we go over 3300 RPMs the alarm stays on until we go back to neutral. The message on the screen says "Sensor power supply voltage is low" when I select more I get . STBD system failure 217.

Is it possible for you to guide me ? Thanks in advance

member bup can help you.he is a wizzard with merc efi and knows his chit.he will no doubt reply to this thread when he has time.

thank you !

There is a temperature sensor on the Stbd side exhaust manifold. The sender is either faulty or the exhaustanifold is corroded to the point that it is not flowing enough water and is truly overheating. Your coolant temp could be fine and still have a high exhaust manifold coolant temp. Most likely a faulty sensor.

Thank you Vortec, do you know where the sensor is located? or How I can find it?

The fuel level code is nothing to be concerned about. Will not cause an audible alarm. The 5vdc code is showing a short in a sensor. The only sensor on that motor with a Stbd designation would be the exhaust manifold temp sensor.

http://www.mercruiserparts.com/Show_...lbow+and+Riser

Look at #16. Behind the riser where the riser bolts to the manifold.

How can you tell it's on the starboard side?

Stbd system failure. That's the only sensor with a Stbd designation on that motor

The wizard is here. just kidding and thanks Mike for the compliment.

Code 217 is a fault that supplies any or all the smartcraft sensor 5 V reference signal. What that means is there is current draw on the 5 V circuit. So what I need to know is year model, engine serial # and do you have the paddle wheel, do you have DTS ?

There can be a lot more involved here including the smart transom circuit / harness. Engine serial number is important here as well.