my Honda 160 GC motor a failure?

[getting kart smart]

I bought a honda 160 gc engine at a flea market. It looked brand new and i paid 40 bucks for it. I put it on a kart and it started right up. Ran beautifully. But it was like it wasn't revving all the way up so I temporarily bypassed the governor. It hardly moved on flat pavement. I think it came off a pressure washer. Anyway, I have the exact same setup on this as the previous one i just built except the other one was a 5.5 HP Briggs. That one ran like a raped ape. Plenty of torque. Good top end. They are both live axles. Both have a 60 tooth axle sprocket and 12 tooth clutch on 35 chain. Both have 410 X 350 x6 tires. The whimpey cart is actually lighter than the 1st one. So I guess my question is
WHY??? Do they reduce rpm on pressure washers to prevent the pumps from going out? Does anybody have any advice or ideas?

 

[Russ2251]

Do they reduce rpm on pressure washers to prevent the pumps from going out?

Short answer...No.
I use a gc160 from a pressure washer as a beater engine. It will run circles around my B&S 5hp.
The gov has been removed but is otherwise stock.

 

[r_chez_08]

Maybe your clutch is gone?
Edit: sorry no it worked fine with the brings.
Sounds like it could be starved of air or fuel

 

[gixxerkart]

Worn out rings? How much use has the engine had? Does it smoke a little? Check compression first, then carb

 

[Doc Sprocket]

I mighta looked new, but looks can be deceiving. In fact, that may have been a hint. A low-hours engine that looks new but is not, may have sat for a long period of time. Try cleaning the carb. While you're there, do the regular maintenance items- Clean and gap the plug, service the air filter, perform an oil change.

 

[OzFab]

I recently had a problem like this on my 3hp B&S, what happens when you adjust the mixture?