NH Boomer 25 won't turn over

[ThurstonM]

I tried to start my Boomer 25 yesterday. The starter clicked but the engine didn't turn over. I've been using it for months after getting it from my brother.
The battery is good and the cables look fine. Not sure what else to check. Hope you can lead me to the right direction, Thanks!

 

[purpl3mountains]

This happened to my uncle's Boomer. We found out that the safety switch under the seat was loose. Gave it a wiggle and it fired right up. Also try checking the PTO and neutral switches. These little things are sneaky!

 

[P1nacolad4]

The starter clicked but the engine didn't turn over. I've been using it for months after getting it from my brother.

I had the same issue before. That click is a classic sign of a stuck starter solenoid. The solenoid is getting enough power to click and engage, but it's not sending the full juice to the starter motor to turn the engine over.
A simple trick that often works is to have someone hold the key in the start position while you tap the side of the starter motor with a hammer or a wrench.
It's a bit of a classic hack, but it can un stick the gear and get it going. If that works, you'll know your starter is probably on its way out

 

[n_h_l_david25]

I tried to start my Boomer 25 yesterday. The starter clicked but the engine didn't turn over. I've been using it for months after getting it from my brother.
The battery is good and the cables look fine. Not sure what else to check. Hope you can lead me to the right direction, Thanks!

Since you're sure the battery is good and the cables look fine, the problem is almost certainly a bad connection or a failing solenoid. Thoroughly clean and retighten all connections from both ends of the positive cable and both ends of the negative ground cable. Corrosion loves to hide where you can't see it, and a loose ground is the number one cause of this symptom. If cleaning every connection doesn't solve it, the solenoid itself is likely bad, as its internal contacts may be burnt, blocking the full current.

 

[Jan_Sauer]

What I would try is grab a multimeter and check if you are getting voltage at the solenoid when you turn the key. If there is no voltage then the ignition switch or wiring upstream is the problem. If you do see voltage but it only clicks then the solenoid itself or the starter is likely bad. You can also jump the solenoid carefully to see if the starter spins at all.

 

[Alan]

Don't forget to take a look at that ground strap connecting the engine block to the frame. It might seem like a minor detail, but if it's loose or corroded, it can really throw you off and make it look like the solenoid's the culprit when it’s not.