50hp efI. Not charging and no tach

[gadams1388]

I have a new to me 50hp mercury. Model number is 50ELPTEFI. I had to replace the electric fuel pump to get it running. It runs good but now I noticed my tach is not working and it doesn't seem to charge the battery. Even when running the volt gauge set on about 12. I am knew to the boat thing. Especially a fuel injected one. Anyone else have this problem.

 

[gm280]

You need to test the rectifier and/or regulator which every setup you have. If they test good, check the stator. If all those test good, you have a wiring issue...

 

[gadams1388]

I don't think it is a wiring issue. The boat ran good before it was parked. How do I test the regulator rectifier.

 

[gadams1388]

I am thinking the regulator rectifier is bad. Will run some test this evening. Is it possible that my stator is bad as well? Would the motor crank and run fine with a faulty stator?

 

[Texasmark]

I am thinking the regulator rectifier is bad. Will run some test this evening. Is it possible that my stator is bad as well? Would the motor crank and run fine with a faulty stator?

Yes you have 2 independently wired and operated circuits, the charging circuit and the trigger circuit. The charging circuit is fed from the two yellow wires from that stator. The tach counts the rectified pulses from the rectifier part of the rectifier/regulator module. If the stator is not sending AC power to the rectifier, or if a diode or two failed in the module you would have no charging and no tach operation. I'd say the stator would be more to suspect than a full wave bridge rectifier unless you have been fooling around with the electrical circuits and may have overloaded it.

 

[gadams1388]

Is there a way to test the regulator or the stator with an ohm meter. Before I just start buying parts.

 

[Texasmark]

Is there a way to test the regulator or the stator with an ohm meter. Before I just start buying parts.

You can subscribe to the Seloc service manuals from this site....check the top of the page "Boat Parts and Accessories". You can subscribe online for a fee and get immediate access to a comprehensive manual for your engine (which is what I did and liked it) or you can buy one and have it shipped to you. Your answers are in there and the manual is good for other things you will probably be wanting to know. Money very well spent.

 

[Georgesalmon]

The stator is just a coil of wire and the magnets in the flywheel spin around and make AC in the coil. Disconnect the yellow wires and test each yellow wire to ground, they should read open. Then check between the yellow wires and there should be a few ohms. No manual here to tell you how many but its again just a coil of wire. If it seems OK then put your meter on AC to the yellow wires and run the engine, there should be some AC voltage maybe 50 vac?. No manual here to tell you how many. If that's OK then 90% sure its your rectifier. The rectifier can also be tested with an ohmmeter, but you need someone with a manual to help with that. Basically it will have high ohms one way and low ohms the other way unless there is a built in regulator which changes stuff. Get yourself a manual.

 

[gadams1388]

I have a manual on the way. Mine does have thre regulator built in. Thanks for all the help. I ordered a new regulator . Will post if this solves my problems.

 

[gadams1388]

Ok so I finally got the regulator in. It is still not charging and no tach. While idling I can unhook the battery and the motor dies. So am I to assume that my stator is bad.

 

[gadams1388]

Ok so I got the ohm meter out today and did some test. I'm only getting about 10-11 vac between each of the yellow wires and ground. What would cause it to be so low. I was thinking it would be much more.

 

[Georgesalmon]

I don't think you should get anything from yellow to ground. There should be AC between the yellow wires. Did you disconnect the yellow wires from the engine before measuring? That's important.