14 tooth small gear by 43 tooth large gear.
.Tach Gear for Ford Holland Tractor - C5NF17373B , Ford/New Holland - 2000 Series 3 Cyl 65-74, 2150, 2300, 2310, 3000 Series 3 Cyl 65-74, 3055, 3110, 3120, 3150, 3300, 3310, 3330, 3400, 3500, 3550 Indust/Const, 4110, 4140, 4330, 4340, 4400, 4410, 4500 Indust/Const, 5000, 5340, 5500 Indust/Const, 5550 Indust/Const, 7000, 8000, 9000, 9200 Description : Tach Gear , Notes : For various Delco generators and 10DN-10SI alternators w/cable operated tachometer-proofmeter.