I have a jx75, and when I move the throttle lever to fast in order to start, the throttle lever feels tight and is hard to move. I'm afraid to keep pushing it so hard, thinking something may break. As you can probably tell from my question, I know very little about mowers, so any advice is much appreciated. Thank you.

Hi,
The most common thing causing a JX75 cable being difficult to move is the crimping of the casing at some point in the cable, using occurring when it gets caught whild folding the handles. There are two part numbers depending on the model and engine. Serial #200000 and before is part #AM117518 and after is part #GX21549. Engines are the FC150V and FJ180V.
Peace,
Clarke