Briggs and stratton 18hp help please

[wiggy]

Hi Guys
Still working on my Max II, does any one have a picture of were I should look for the wires that stops the engine? mines a 2001 model, it starts fine but will not turn off on the key, posted this a bit back, but not had time to sort it again untill now.
Richie

[wiggy]

Hi Again.
Been trying to find the fault why it will not shut down, after raseing the top, now its not starting!! tried a screw driver cross solioid and nothing! checked wires seem ok, now totally lost!
Richie

[wiggy]

Briggs and stratton 18hp help please

Hi Guys
I been trying to find why I cant turn my engine off on the key, raised the top, now it will not start on the key!!! ehhh tried a screw driver across the solinoid and nothing just trys to weld the screw driver down lol, check wireing seems to be ok, but now totally lost any help would be great thanks
Richie

[amphibious drew]

Sounds like a bad ground maybe. Or your key switch pulled out of the wiring.

[JoeMeg]

Hi Wiggy, sorry I don't have anything conclusive to offer but I'll say what i think.

1) I think you have 2 separate problems.

2) I'll guess the elec circuit is not providing the ground to the ignition to stop the spark. Why,IDK,just have to follow wires.

3) Again,just a hunch,but I'll guess the starter is seized or worn to the point that the brushes are each touching two commutator plates at the same time. This tries to run the motor in both directions at the same time. A stalled DC motor looks like a dead short in the circuit. That's why it wants to use your screwstick for an arc welding electrode.

Again,sorry I don't have anything more certain to tell you. Best wishes,hope ya get it figured out.

[wiggy]

Thanks for replying, can I do any checks befor removing the starter motor? seems funny it was working ok till the top was raised?
Richie

[JoeMeg]

Unfortunatly,I don't think so. The screwdriver is already showing us that there is little,if any,resistance value. I don't think the helix on the starter is very accessible without removing it to see if it turns freely. I will go out on a limb here and say that I don't think it had anything to do with raising the hood,lol. Been around industrial equipment almost 40 years and have seen many similar "coincidences".

[ARGOJIM]

Make sure you have a good connection at the battery and the solenoid. Is your battery charged and good? Are you sure? A dead cell can drop off instantly.

There are wiring diagrams on the home page in the manuals section. Trace your wires if needed, as Drew stated, wires may just be off at switch to shut down and excite the solenoid.

[wiggy]

Thanks guys, so the starter needs to come off? are they serviceable? or a bin job? I have new battery coming tomorrow for my other max II,so I can check with that one, I did have a look at the wiring diagrams but was not 100% sure which was mine

[akcrawler]

I am not sure what problem you picked up when you raised the top. It sounds like you may have disturbed a power termination somewhere. I was going to recommend that you check all of the wires going in and out of the ignition switch. I found a loose one on my Max IV after just a few hours of operation. One of the female clip connectors had backed off of the blade on the switch body. I don't know if I caused it when I was looking around in there or it was just not seated all the way when they built the machine.

It probably wouldn't hurt to go through your machine and check all of the connections from the battery, through the ignition switch, and out to the end devices. Make sure you check your ground connections too.

[wiggy]

P.S Been looking at starter moors on ebay and they sell back plates with the brushes built in? when I get chance I will remove the starter motor to see if its dead or not , and let you guys know, also been looking at Solenoids on ebay for WESTWOOD TRACTOR, looks sames as the ones Max fitted , but it has two spade connectors at the bottom, I know one goes to the green wire, but whats the other for? and can I use this one ( ebay item number 390931066324)
Richie

[wiggy]

Hi again, I put the volt meter on the green wire (spade) on the solenoid and the other end of the volt meter on the earthing strap, got the wife to start the engine and it fired up right away!!! so am I right in thinking this is an earth problem?

[wiggy]

Hi akcrawler, I put the volt meter on the green wire (spade) on the solenoid and the other end of the volt meter on the earthing strap, got the wife to start the engine and it fired up right away!!! so am I right in thinking this is an earth problem?

[ARGOJIM]

If I understood what you're describing it now sound as if some Brit has been playing with your wiring. Could be because of the standard parts that are over there compared to here.
To me ,if I understood you, when you ground the small terminal on the solenoid it starts? If so you will need to get a power excited starter relay, the ground(earth) excited starter relays have not been used for sometime over here. Your switch may have also been changed.

Next there are 2 types of switches used in the Max machines a 5 wire and a 7 wire here;

http://www.6x6world.com/images/recreatives-industries/Switch-Conversion-5-pin-to-7-pin.pdf

Both the switches are Indak switches that ground when shut off, one has a off/run/start set up and the 7 wire has a off/run/accessory,start setup. Generally the 7 wire will have the headlights hooked to the acc. position, the 5 wire will either always have the headlights on or need a separate headlight switch.

The shut down wire will run from the switch to the engine where it connects to a very small stud on the upper side of the engine shroud.

[wiggy]

Will check tomorrow, going to change the solenoid too, as its not bolted down, is the green wire positive or a ground? just when I had the volt meter on it ( red clamp on volt meter) and the black clamp on the ground) then turned the key and it started, this fault only just started since raisingthe top.