TPD1317e Chapter 6 Fuel Systems Design and assembly faults in the fuel system are responsible for many problems with marine diesel engines. A good system is not hard to achieve, being largely a matter of avoiding obvious pitfalls. 6.1 Fuel Connections A common reason for service problems with fuel systems is the use of poor or incompatible connectors, where the pressure tightness depends upon the use of sealing compounds, hose clamps, fibre washers trapped between inadequate and unmachined faces, or compression fittings which have been over-tightened to the point where they no longer seal.
Cleanliness during initial assembly is also of vital importance, particularly when fuel tanks are installed, as glass fibres and other rubbish may enter tanks through uncovered apertures. Thread details of the connections on the engines for fuel pipes It is strongly recommended that the flexible fuel pipes available as an option with the engine are used, which are as follows: Fuel Feed - M300Ti & M265Ti (Pt No 34051) The free end of the flexible pipe has a 3/8” BSP cone ended fitting, and is supplied with an adaptor, nut, and olive to suit 10mm OD steel or copper tube.
- M225Ti / M215C / M185C / M135 / M130 / M115T / M92B & M92 (Pt No 34055) The free end of the flexible pipe has a 1/2” UNS male thread, and is supplied with a nut and olive to suit 5/16” OD steel or copper tube. Fuel Return - M300Ti & M265Ti (Pt No 34052) The free end of the flexible pipe has a 3/8” BSP cone ended fitting, and is supplied with an adaptor, nut, and olive to suit 10mm OD steel or copper tube. - M225Ti / M215C / M185C / M135 / M130 / M115T / M92B & M92 (Pt No 34054) The free end of the flexible pipe has a 7/16” UNS male thread, and is supplied with a nut and olive to suit 1/4” OD steel or copper tube.
Page 33 Model M300Ti / M265Ti M225Ti / M215C / M185C / M135 / M130C / M115T / M92B / M92 Fuel feed 3/8” BSP 1/2” UNS Fuel return 3/8” BSP 7/16” UNS