2009 Mercruiser 4.3l engine wiring diagram

[peglowskialex]

Hello,
I have a 2009 Mercruiser 4.3l in my tracker Tahoe q5si. It is having a starting/running issue in the electrical system.
Does anyone have the wiring diagram for this engine that they could share with me?

Thanks in advance

 

[Fun Times]

Carb or MPI?

Starting in 2007 you won't find much in a normal service manual when it comes to detailed wiring schematics...The following is what you'd find in a general Merc service manual regarding Wiring Diagrams.

MerCruiser Color Wiring Diagrams:
Large scale, oversized color wiring diagrams are available in the MerCruiser Diagram Binder. The initial distribution of the MerCruiser Diagram Binder was delivered to MerCruiser authorized repair facilities in June and July of 2007. As new diagrams are developed they will be distributed along with a revised, comprehensive index for addition to an existing binder.
The MerCruiser Diagram Binder features:
• An index that identifies the diagrams by harness number, by engine group and drive, and by engine size and type
• The diagrams are printed on an extremely durable, coated synthetic paper and can be wiped clean of grease and oil after use.
• The larger diagrams are easier to read. The diagrams will come in two sizes, depending on the complexity of the related harness.
• Removable pages are easier to reference and allow the technician to take only the required diagram to a repair site instead of a complete service manual.
• Dry erase markers can be used directly on the diagrams for tracing circuits or for training. They wipe clean after use.
• Harness number headings make the drawings easy to find. The accompanying MerCruiser Diagram Binder Index speeds lookup when the harness number is not known.
For information about ordering additional copies of the MerCruiser Diagram Binder or binder updates contact:
• MerCruiser Authorized Dealers, Repair Centers, or OEMs can order service literature on MercNET.

• Consumers can order service literature through the Mercury Dock Store (www.mercurydockstore.com), contacting Mercury MerCruiser publications at 920‑929‑5110 or by contacting their local MerCruiser Authorized Dealer or Repair Center.

Contact Us! MerCruiser Customer Assistance | Mercury Marine

www.mercurymarine.com

Here's only an example of what it could be like,

Mercury Mercruiser Diagrams Binder. Contents sheet is dated March, 2007.

Sometimes you can find binders on Ebay too...Either try searching Ebay merc wire binder / your engine size or if you can get the Merc part number for your engine model should help too.

 

[Bt Doctur]

helpful if you describe the problem your having

 

[peglowskialex]

The problem is difficult to describe. When I started the boat the other day I reversed 20 ft or so then moved to forwards and the thing stalled. After that all electronic that are operated through the key were dead. Found that there was not power to the key so jumped it from the batter and it would start. Ran for about 5 then would stall and not start. It would turn over but not start. Let it sit for half an hour or so and it did the same thing. Did some other tests on the various electrical components like the ignition coil, solenoid, and the key. All of those tests came back fine went to start it again and it ran for about 10 minutes, I then talked to my neighbor about it but he is not sure either. With him we started the boat and it ran for over half an hour. We drive it in the lake, revved it in neutral and it performed fine. Went out to it this morning and it started up no issues. Took it out fishing without any problems and made it back to the house. So the problem suddenly stopped. Not sure what to think.

It is a carb engine

Thanks again

 

[nola mike]

Gauges working or no?

 

[peglowskialex]

They work with the jumper, but not in the original wiring configuration

 

[nola mike]

And you're jumping to the I terminal of the switch (purple wire)? So you should have power to the red/purple on the ignition switch. If so it's either ignition switch or the purple wire (if you have no power to purple with ignition switched on). you need to trace it back to the coil (TB ignition I'm assuming), especially pay attention to the large cannon plug.

 

[Dillusion808]

Try just pushing on the plug for the harness at the motor.

My original one the plastic was hard and warped. It would not stay on good even with a hose clamp. Sometimes engine would start and sometimes I had to push the plug back in a little.

I ended up heating it with a heat gun a little and shoving it on to reshape it and it was solid.