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Check that fuel is reaching the injectors by unscrewing the pressure pipe on the injector, and then turn
the engine over using the starter motor. If no fuel appears it may mean that the filter is blocked, the fuel
pump is defective, or that there is air in the system. Change all the filters and vent the system. If not fuel
appears after this, either the feed pump or the injector pump maybe defective.
If fuel does come out of pressure pipe when you carryout this test, it may mean that one of the injectors
is defective. Change the injectors and try to start the engine again. If the engine still will not start the fault
is probably in the injector pump. You should take it to a professional. Check the position of the stop cable.
7.3
Uneven running or excessive vibration
Most interferences in engine running are caused by defects in the fuel supply system, which in turn are
often the result of water, air or impurities getting into the fuel. You should therefore change all the filters
and vent the system, and perhaps change the injectors. Check that all fuel pipes are properly connected.
Rather more infrequently, it may be that the trouble is caused by loss of compression in one or more of
the cylinders. Compression should be checked by professional.
7.4
Engine over heats
If the engine is overheating, check to see if:
The impeller is defective
The cooling water intake or jackets are blocked. (If yes, dismantle and clear them)
7.5
Engine does not attain full revolutions
If the engine starts properly and runs smoothly, but does not reach the same revolutions as previously,
this does not necessarily indicate a defect in the engine, but may mean that there is fouling on the
bottom of the boat, or that it is over loaded. It is also possible that the propeller maybe defective. If all
these causes can be eliminated, there may have been a loss of compression in one or more of the
cylinders. Compression losing should be checked by professional.
7.6 Aligning engine and gearbox
Once a season or after launching, the alignment of the engine with the propeller shaft should be check
and if necessary adjusted. To do this:
Unfasten the screw union for the propeller shaft flange. Using a 0.10mm thickness gauge, check the that
there is not enough room to insert it between the reverse gear and propeller shaft flange any point when
the propeller shaft is pushed forwards. Turn the shaft through 90, 180 and 270 when carrying out this test.
If the gap is more than 0.10 mm the alignment should be adjusted. If a non-adjustable rubber suspension
is fitted, the thickness of the padding should be adjusted.