Bmc engine problem

[chell]

Bleed engine boat boat will run anything from hr to 2 on tickover. Any higher revs. Moving dies within a hr. Thinking air in fuel lines. But beside that now all of a sudden getting a lot of black smoke. Any advice much appreciated. Fuel Filters changed. Oil filter changed. New oil. Checked for any obvious leaks none detected. HELP

[WotEver]

Something around the prop?

 

One of the prop bearings partially seized?

 

Stern gland too tight?

[chell]

Nope none of them. Thanks for quick reply though.

[70liveaboard]

Perhaps the fuel injectors, if old, can be a problem.

[ditchcrawler]

Black smoke could be lack of air

[chell]

Bleed engine. Getting good at it now. Engine runs perfect no miss beats. But will then revs up a few times n die. Then have to re-bleed. Which makes me think àir in pipe.

Black smoke has only just happened. Checked air filter. Pancake type. Then breather pipe n cap all looks ok.

[Boater Sam]

Water in fuel

Tank vent blocked

Lift pump drawing air - diaphragm - check for fuel in oil

Fuel filter/s blocked/water

stop solenoid worn

Overheating

Air filter blocked/wet

Engine consuming its lubricating oil - potential run away

Edited June 20, 2018 by Boater Sam

[Tony Brooks]

0.5 mm hole in the banjo bolt in top of filter bocked so air builds up in the filter rather than leaks back to tank but the black smoke does not seem to fit.

[chell]

This has been checked and looks ok. 

 

[Bee]

First thoughts re. black smoke is air filter, remove the thing and see what happens. One way to isolate a stack of odd problems is to get a container full of nice clean diesel, 2litre milk containers are good, bodge up some sort of plastic tube, place it above the height of all the pumping gubbins on the engine, bleed it and see what happens, this will obviously cut out dirty tank problems, filter problems and maybe lift pump problems.