Ford Lehman's are an exceptionally robust (lots of weight for the hp) eng. I have 2 -120's in my 49RPH Defever. Rebuilt the starb. one this Jan, darn thing only had 20,007 hrs on it. It had 4 pistons with broken rings, a wiped cam , and lots of wear on the bearings. At tear down it was still running, just had a lot of excess crankcase pressure (oil,
oil leaking everywhere). Anyway enough with the dry
humor. The eng was manufactored in
England, and used in european farm tractors. Nothing metric on it, everything is standard. All
parts are available here in the
USA and competively priced. All maintance is straight forward, on mine the stbd
engine oil filter and the on eng
fuel filters are
outboard , and a little ackward. But it is all do-able. We figure 2 miles per gallon at 1700
rpm spd 7 kts slack
water. This figures out to a
fuel burn of 3.5 gal /hr. Will be rebuilding the port eng this summer, so will have 2 fresh ones when heading south this fall. Would highly recommend these eng, and since I just noticed that you are in the UK
parts should be cheaper as you can buy them at a farm
equipment dealer, lucky you.