We're looking for some advise;Purchased a new ZF Gear
Box to replace one that died. On our test run (on a slack tide) we were getting only half our normal cruising speed. At about 1500rpm we get around 5 knots, on the test run we were getting 2.5kn. Our old gear
box didn't have a description plate however we left the gear box with the supplier for a week pre purchase
. They told me then and there that it was a 2:1 ratio after turning the shaft.Invoice description was 3305 052 102 ZF Gearbox
. (Haven't got a photo
of the new gear box with me to show the plate but it does say ZF12M)
Any ideas what could be the problem? Note: I cleaned the bottom the day of the test run.
Does anyone know what the numbers are on the Nanni name plate?