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Starter troubles

623 Views 1 Reply 2 Participants Last post by  tomw0
Hello MTF,
I need a little figuring out my starter issue. Short story..... bought used Branso 4220 with cracked head. Replaced with new head - replaced oil - replaced hydro oil - replaced all filters etc installed new battery and checked all cables.

Turned the key and nothing. Poked around and saw a couple of jumped out terminals close to the starter. I’m assuming previous guy jumped out safeties. Still poking I find a push button under the dash..... well I pushed it and bingo motor turning. Got a little excited and cranked way too long and starter got real hot and nothing after that!!!!

Took starter off filed contacts flat cleaned all crud off everything. Put it back together and bench tested ?? back in business. Installed and nothing not even a click. I have 12v going to starter and up to the push button. However when I push the button nothing???? What the heck?? Checked the button and I have 12 coming in but not out. Removed solenoid trigger wire and tested again.... I have 12 still coming in and now coming out through the button, so button is good.

Now I’m thinking poor ground right? I placed negative jumper directly from the battery to the bolt holding the starter. All I get is a weak click, not like a solenoid click more of a tick than a click.

Take it off again using jumper cables from battery and using the button.... bingo works great!!! No hesitation no ramp up all appears to good with the starter. I should mention I turned the motor by hand thinking the worst, but it turns over just fine.

What the heck am I missing here? Does anyone have any suggestion or ran into this before? Any help would be greatly appreciated.

Thanks in advance
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FWIW, this area seems to be 'long time ago, when I was a boy... uphill both ways' story area. You'd get better response in the engines area or by the brand of machine.

That said, you are measuring voltage with the relay 'in circuit', which will give confusing results.
For example, with the battery connected, the button(starter) pushed, you will get 12V on the supply side of the button, and, if the relay is NOT connected, 12V on the relay or load side of the button switch. Connect the relay, and the relay uses the voltage, directly through the winding, to ground... so volts will be ZERO or close, depending on resistance of your meter and that of the winding. Disconnect the relay power side control wire, measure voltage at the wire, and you will see the 12V from the battery, fed through the button. Re-connect, disconnect the relay winding 'other end' from ground, or the relay ground mounting bolts(float the relay), and you'll see 12v on the 'out' end of the relay winding. Connect the winding end to ground, and it should flow juice, and close the relay.
If you supply 12v and the relay does not click, either it is not getting enough voltage/current(dirty connections, dirty contacts, ???) to operate the relay, the relay winding is broken, or the relay winding other end is not grounded or has a poor ground.
Some relays have two small control terminals. One would be ground, and the other the 12v from the switch. If there is only one, generally the relay mount is the ground for the winding. If it is not grounded, mounted on a painted surface, or has corrosion, relay operation will be tentative...
Separate the relay from everything so you don't get 'things' happening, and operate the control by grounding and applying 12v. If it does not click, take it apart or get another. Re-install. Test.
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