TACHOMETER, WIRELESS-SMALL ENGINE TEST Pacific Bay Equipment Sale! from $195.00 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Small Engine Test Equipment Terrific service aid for 1-cylinder engines Just hold built-in antenna near spark plug Two scales: 0-5,000 RPM or 0-15,000 RPM Solid-State Electronics Requires 9V Battery (not included) Excellent for setting GPM on pressure washers; accuracy within 2% of full scale