SeamanStaines
Well-Known Member
That is a very light weight (J4?) kelvin, the ones I was referring to are K2 or 3 which tick over at 140 rpmish.
I used to have a J2 in a canal boat, I don't think you would describe it as very lightweight!
The old bolinders are two stroke Diesel engines with hit and miss regulators, a particular fun feature is no gearbox so to get reverse you stop and restart the engine running the other way using a side injector. This sometimes works but you normally just get silence (temporarily before the inevitable crunch). Kelvin J and K's are four stroke diesels with a separate petrol system to start them (with an entertaining governor that relies on being kept full if fuel or it fails with the engine racing until it blows up!). The K series is identical to the J's just everything is twice the size and four times the weight!