As soon as the key to the 115 yamaha fourstoke is turned the unit shuts down instantly I have checked for voltage drop at bus bar with voltmeter and doubled up positive cables to battery switch. boat is aluminium and i havent grounded unit to it. It has only one battery
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check the operating rpms
the rpms determine the voltage and frequency and can be adjusted at the governor spring setting
adjust it until the voltmeter reads the required voltage
set slightly above to allow for rpms drop under load
for example if 240 volts set around 250 volts and that will drop back to 240 volts under load
if 110 set around 115 and that will drop back under full load
both frequency and volts are dependant on rpms
Hi, Anonymous after you disconnect the battery, remove the starter solenoid cap and break away the contact plate from the shoes and clean/dress all electrical arc residue. In order to diagnose the starter circuit, you must start with a fully charged battery, 12.5 volts or better and be able to pass a proper load test if necessary. The battery cables and terminals must be clean and tight. The "NEGATIVE" cable is famous for corroding and or breaking inside the harness, check the connectors at both ends. Check your starter relay with a test light for continuity, it could be faulty due to corrosion and sticking in a closed configuration, another claim to fame. Finally, there is the starter solenoid, low battery voltage or faulty battery connections will cause extremely high amperage at the plate and contact shoes and rob the hold in coils of much-needed voltage. In extreme cases, the solenoid plunger plate will literally weld itself to the contact shoes, keeping the circuit closed and thus permanent engagement. Another scenario is unacceptable voltage drop to the starter solenoid from the ignition switch to the starter relay to the starter button, and finally to the solenoid. Remove the green wire from the starter solenoid and hook up the positive lead of your voltmeter to the green wire connector and ground the negative lead. Turn on the ignition switch and depress starter button, the voltage reading should be no more than .5 volt less than the battery voltage. If it is more than .5 volt you need to backtrack that part of the circuit with your voltmeter until you find the voltage robbing offender. Next, remove the 3 screws that secure the solenoid cover and remove the plunger, dress the plate and the contact shoes of arching residue and make sure the contact shoes are tight and secure. If you have done all of the above, replace the green starter button wire, hook up your voltmeter to the battery and check the voltage drop when you start the engine, anything below 9 volts could indicate a faulty battery and a proper load test should be performed. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day. Yamaha R6 Forum YZF R6 Forums View Single Post Does your R6 make noise... Starter staying engaged 2008 2009 Yamaha YZF R6 Service Manual R6 Moto Data Project OEM parts for Yamaha http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals
Ensure battery cables are clean and tight,
Check that the main fuse is intact...should be close to battery.
Hook up a voltmeter to battery and monitor voltage when you turn on the key and press starter button. If voltage dives down, battery is bad. No change in voltage....incomplete circuit....main fuse, ground cable...etc
not enough information on the motor. what year and model? but all yamaha outboards are shut down by the C.D.I. being grounded by the key switch or the emergency kill switch. the cheapest thing to test or replace is the key switch and the emergency kill. with more info on engine I can help you further.
It has an internal problem. Just received an RX-V2600 back from service for the same issue. It took a voltage drop then a spike. It takes out 5 caps and a few other parts. The repair will run roughly 250-275 depending on who does the service. Hope this helps
You can try this to verify that the starter is good or bad.
StarterTestingStarting System Voltage Drop TestsNOTE: The battery must be in good condition and fully charged prior to performing this test.
There are three area of the starter motor circuits that voltage drop test can be performed on. These include:
Disable the fuel system by removing the fuel pump fuse or the fuel pump relay.
Verify that the vehicle will not start.
Connect the positive lead of the voltmeter to the case starter B+ terminal.
Connect the negative lead of the voltmeter to the lug (the starter M terminal) that connects the starter solenoid to the starter motor.
Turn the ignition key to the START position and note the voltage displayed on the voltmeter.
Ideally, there should be no more than 0.2 volt drop across the starter solenoid displayed on the voltmeter.
In general, there should be no more than a 1.0 volt drop throughout the entire starter motor feed and ground circuit. Any voltage drops measured in either the feed or ground circuits after connections have been cleaned will require replacement of the affected battery cable. Typically, any voltage drops measured in the solenoid are repaired by replacing the starter motor.
I looked at all the steps for replacing the blower motor...they should not have messed with anything that would have affected the operation of the starter.
first check the condition of all circuit wiring for damage. Inspect all connection to the starter motor, solenoid, ignition switch, and battery, including all ground connections. Clean and tighten all connections as required
Check the voltage drop between the negative battery terminal and the vehicle frame by placing one lead of a voltmeter on the grounded battery post (not the cable clamp) and the other lead on the frame. Turn the ignition key to the START position and note the voltage drop.
Check the voltage drop between the positive battery terminal (not the cable clamp) and the starter terminal stud. Turn the ignition key to the START position and note the voltage drop.
Check the voltage drop between the starter housing and the frame. Turn the ignition key to the START position and note the voltage drop.
If the voltage drop in any of the above is more than 1 volt, there is excessive resistance in the circuit. Clean and retest all cables not within specification. Replace as necessary.
let me know what happens