cliffhodges

Yeah it was unexpected.  The engine was basically operating at half power (1 good ignition coil, 1 bad one).

In case anyone is following:  we finally diagnosed this issue.  It was an ignition coil.  Pretty much fried out under the heavy load.  Was not the belt (or the wet clutch as the mule doesnt have one). Thanks everyone for your time and input!

I dont need to check in under load because the problem perists regardless now. It started because of a heavy load, but now the problem happens whenever driving, load or not.  So I'm wathcing the belt as I drive - I've got the bed tilted up and the clutch housing off, so I can look directly at it as I drive. Not slipping.  I'm totally stumped.

Thanks @Azul - I wish it were the belt because I'd know how to fix that.  I've checked the belt like 10 times now - not slipping at all.

thank you @Travis ! I'll work on this and report back.  thank you!

Thanks @motojoe - unfortunately I don't think I know where that is or how to work on it.  Might have to take it to a shop.  But any tips?  On hoe to access the wet clutch on mule?

Hi All- Long time reader, first time posting.  I have a 2016 Mule 4010 (model: KAF 620V).  I am having an issue since overloading the payload a couple days ago (yes I'm a dummy).  I live on a very hilly property and I was trying to move some large oak rounds for firewood splitting.  I put WAY too much wood in the bed and when I started driving, it sputtered, kicked out of gear, and then cut out.  I unloaded all the weight and started it again - appeared to be running fine when idling and/or driving on flat ground at slow speed.  But when try to go fast or uphill, the RPM's rev high and it sounds like the motor is fine, but it has ZERO speed or power at all (literally creeps uphill at like 2-3 mph and won' go faster or take any weight), and has no power at all.

Other info: 3 weeks ago I did a belt replacement.  So I was worried I perhaps screwed that up somehow. But I just opened the clutch housing to check and the belt and clutch appear to be working just fine.... sooo.....

Any ideas what I screwed up by overloading payload and immediately trying to drive uphill?  Any tips would be greatly appreciated!