Page 9 In-line hydraulic engagement gearboxes Make VELVET DRIVE PRM ZF MARINE ➀ Short term, low power use only, except PRM boxes which will take full power in both directions ➁ High power variants available, 72LH 19.0, 72LHP 26.7. Dimensions change to W=39, J=323, C=241, F+77 ➂ Output rotation is opposite to input ➃ Also available as an integral Vee-drive, request information * Pleasure boat rating ➄ If fitted with MT0530 adaptor, H=5, J=452, W=98 All gearboxes may be operated with single lever remote controls, and will accept propeller shaft thrust. Always fit a flexible coupling. G H C J F Installation parts available include:- Flywheel housings and adaptors, flywheel drive plates, oil coolers, shift cable connection kits, flexible couplings,shaft half couplings, C.V shafts and thrust bearings Electric shift available (aftermarket on PRM) Model 71/71L ➃ 72/72L/72LX ➃ 72 ➃ 260C 750C ZF45C ➃ ZF63C ➃ 301-1C ➃ REDUCTION 1.00 1.00 (1.52) (1.09) 1.00 1.00 (1.00) RATIOS :1 (1.88) ➂ (1.46) 1.24 IN FORWARD (2.10) 1.96 1.94 1.41 (AS ENGINE) 2.57 2.56 1.86 ROTATION 2.91 2.94 [2.90] 2.69 REDUCTION RATIO ➀ 1.00 1.10 +10% SAME AS FORWARD 1.03 1.03 SAME AS IN REVERSE FORWARD Weight W Kgs 43/28 49/32 69 63 93 31 32 87 Length J  mm 267 291 452 360 400 267 267 344 Depth C mm 144 144 144 117 155 145 145 200 Spigot F mm 209 209 209 209 209 209 209 SAE 1, 2, 3 Shaft G mm 65 65 65 65 65 65 65 SAE11½, 14 Flange H ins 4 5 5 5 5¾ ➄ 4 5 5¾ TD Max Diesel HP/100* 5.7/7.8 8.6/4.9/14.2➁ 8.6(7.1) 3.6 (10.5)9.5[8] 7.4 9.6 19.4 (15.0) MAX RPM 6000 6000 6000 4500 4500 5500 5500 3000 Cooler size (min) 1 2 2 2 3 1 1 2 Lubricant ATF Dextron Engine Oil ATF Dextron Made in USA Made in England Made in European Community