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2019 T-Boss 410 Will Not Start

onealmck
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onealmck Newbie

onealmck

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I have a 2019 T-Boss 410 that died one day after we parked it. It had been getting harder to start (had to hold the throttle down) for some time but would not start. The starter clutch seized while I was trying to start it. I replaced the starter clutch and it will not start. It appears to have solid fuel pressure and solid spark. It "fires" but will not actually run. The exhaust gets hot after cranking so I know that's actually firing but it won't fully start. Any ideas?

Joe Breaux Experienced

Joe Breaux

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You have air, fuel pressure and spark..and won't run...must not be happening at correct time.. Camshaft...Timing chain?  Can you verify the valves are opening?  Compression test?

onealmck Newbie

onealmck

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I did run a quick compression test and I seemed to have decent compression. It's been a few weeks ago so I can't remember the number but I'm thinking it was in the range of 145 psi. The plug is covered in soot very quickly. I replaced the mass air flow sensor as it appears that the fuel mixture may be way too rich but I'm not sure. 

onealmck Newbie

onealmck

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I've run just about everything in it but when I started running into issues I put 91 octane non-ethanol gas in it. I don't think bad fuel is the issue. I have had several people tell me they are finicky with gas. Just the same I might drain the tank and put fresh fuel in it and see what happens. Can't be worse!

 

Joe Breaux Experienced

Joe Breaux

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Mine runs fine on 93 octane even when it's a few months old.I assume you checked for water in the fuel?   ..maybe you just have a bad plug. Have you tried a different plug?

onealmck Newbie

onealmck

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I put a new plug in it as well as a new coil actually. The parts are relatively inexpensive and even though my spark seems strong I am tired of messing with it. In any case, I'm using an NGK plug. Same as what came in it from the factory.

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Greg Kilgore Collaborator

Greg Kilgore

Posted
Posted

Could try this. Simple and easy to do.

Make sure the battery has a good charge. Since you've been trying to start with no luck. I'd charge overnight with a 2 amp trickle charger. Then.

Reset the ECU. Easy to do. At times, my machine is hard to start and I have to hold down the throttle a little to get started. I reset the ECU and I'm good for 1-3 months.

With the machine off.

1. Turn machine on but don't try to start. Just so the fuel pump kicks on. Leave key on until fuel pump builds up pressure and kicks off.

2. Cycle the key off and on 5 times within 30 seconds. Make sure the fuel pumps runs each time.

3. After the 5th time in on position. Turn back off and wait 30-60 seconds. 

4. Turn key on. Wait for fuel pump to kick off. Try and start machine.

 

Joe Breaux Experienced

Joe Breaux

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Posted
11 hours ago, Greg Kilgore said:

Could try this. Simple and easy to do.

Make sure the battery has a good charge. Since you've been trying to start with no luck. I'd charge overnight with a 2 amp trickle charger. Then.

Reset the ECU. Easy to do. At times, my machine is hard to start and I have to hold down the throttle a little to get started. I reset the ECU and I'm good for 1-3 months.

With the machine off.

1. Turn machine on but don't try to start. Just so the fuel pump kicks on. Leave key on until fuel pump builds up pressure and kicks off.

2. Cycle the key off and on 5 times within 30 seconds. Make sure the fuel pumps runs each time.

3. After the 5th time in on position. Turn back off and wait 30-60 seconds. 

4. Turn key on. Wait for fuel pump to kick off. Try and start machine.

That's new to me.had not heard that👍

 

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