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Re: MF35, starting & diesel quality?

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Author  [Modern View]

03-24-2013 17:09:04

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Thanks for the reply Wellmax99. It has two heater plugs in the intake manifold, the manifold gets hot, I can even hear a flame front some times when I'm preheating the intake so I know its working. I was told that's how this system works, it introduces diesel and heat to start a small fire in the intake manifold to aid in starting.

Air filter is the oil bath type which I cleaned out and put fresh oil in when I got it(it was in poor condition before this). Haven't checked the fuel filters but the previous owner said all the filters were fresh.

The battery is good, its a truck battery. I keep it on a solar trickle/maintenance charger during the week. It has no trouble cranking the engine over for many minutes if its being difficult to start.

I put 20w50 oil in it as the engine is a little tired, but it has had this oil in it for weeks and has been starting fine with it. I don't use starting fluid - haven't needed to as it was starting first go until the last fuel up.

The only thing I can isolate as having changed is the fuel? Was originally a pig to start, put some fresh fuel in and it was starting fine, now all of a sudden another new tank of fuel and its being a pig again! I'm in Australia and we're in Autumn but the temperatures are still warm (20C+). The fuel was purchased a couple of months apart from different sources.

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03-24-2013 20:42:11

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 Re: MF35, starting & diesel quality? in reply to OzMF35, 03-24-2013 17:09:04  
I doubt fuel quality is the problem here but adding fuel to the tank can stir up any crud in there and cause problems.
AT 20C, it should start easy but since it is most likely a Standard 23C diesel they are notorious for being hard starters. Does pre-heating help? If it doesn"t and the engine is in reasonable mechanical condition(good compression, good valves, etc) I"d suspect the fuel delivery. While I"m not familiar with your specific intallation, the fuel delivery system includes the tank, a shutoff valve/strainer fuel line to the filter filter to pump fuel line and a return to tank line from the injector pump to the tank.
Check for full flow through the filter by removing the fuel connection to the pump and checking on the flow. An unrestricted fuel system from tank through to the filter should allow a CONTINUOUS gush of fuel. If it dosn"t, then suspect a restricted filter or a clogged strainer in the tank bottom, and make sure the tank vent is not clogged. Check all your fittings for tightness so they cannot suck air. Throughly bleed the fuel sytem starting at the fuel filter, through the pump and to the injectors. See if that helps.

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