D dfbrown Well-Known Member Jun 6, 2020 #12 With a wire or wireless tachometer for small engines. Get one on amazon pretty cheep. Hrx217 should be 3,100 with blades engaged. Off the record you can cheat it a tiny bit like 3200-3250 and be safe for sure.
With a wire or wireless tachometer for small engines. Get one on amazon pretty cheep. Hrx217 should be 3,100 with blades engaged. Off the record you can cheat it a tiny bit like 3200-3250 and be safe for sure.
