Red = direct battery connection
Red/Purple = battery voltage after 50 amp breaker
The Red/Purple goes to several places, and then to thru other fuses (changes colors) and on again
Its the shift switch on the shift plate, it needs adjusting or replacing
The in gear switch is telling the ECM that the boat is not in gear, and beeps starts above 3500
That just doesn't sound right. On the negative side of the coil there should only be a gray tach and another gray that goes back to the TB ignition module
Here is a 4.3 but wiring is the same
On a 3.0 the temp switch applies a ground to keep the TKS module extended. If the temp switch does not stay closed then the module cools down and retracts the post, which would cause the motor to draw in more fuel then needed. From what your talking about I think this would be the issue
Measure the dipstick tube
Standard 24 inch
Closed 30.5 inch
This brings up another issue which does not make since
Standard dipstick 21.5 and tube 24 = 2.5 inch above the tube
Closed dipstick 30.25 and tube 30.5 = .25 inch above the tube
Probably another misprint
From manuals 32 and 25
Have to have the right fittings.
The path for fuel supply is filter, pump, Regulator and fuel rail. Anything over 30 psi goes back to the filter and repeats.
Not real versed on VP steering but think they have the need to be setup as Mercs to get the valve channels in correct alignment. In the pic not the flats need to be straight up and down once the steering cable is aligned
Het Scott Danforth
The pic only shows the ignition side, which the purple wire also goes to the alternator and choke
Power from the motor comes up on the red/purple wire going to the key switch. The purple wire is ignition which goes to the kill switch and then to the gauges and back to the motor. The...
The Red/Purple wire comes from the motor thru the ignition switch and then to the gauges. If disconnecting the gauges stops the drain then then I would see if the key switch is the issue, or something has been connected to the wire. Could also be that the wire coming from the motor
Here is what I found using your serial number (item 19)
Closed cooling uses a dipstick of 30.25 inches
Open cooling uses a dipstick of 2.50 inches
https://www.mercruiserparts.com/bam/subassembly/31492/11812/140
Electrical things heat up because of current. A coil should not get much beyond warm. The manual does list 1.8 to 2 ohms for resistance wire, but may want to try a 3 ohm balast resistor based on coil findings
Measure the coils and see if they conform to the pic
MFD is Microfarad and is the capacitance measurement of the condenser
Condenser is old term for Capacitor
Advance is 10 to 13 degrees
Here is the OEM manual
http://boatinfo.no/lib/mercruiser/manuals/mercruiser2.html#/674
