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sailalibi · 16-06-2015, 12:11

After sitting for 2 weeks my engine cranks but won't start. I changed racor and secondary filters, bled the secondary filter and the injector pump. Still no fire. I pulled all 3 injectors and reconnect ed them to the feed pipes and all spray patterns looked as per specs. I had compression checked and get readings above 300 all cyls.I sprayed wdt into intake manifold while cranking with no start. I even held a gas soaked rag at the intake still nothing. I am waiting on 3 new glowplug as 1 is bad...what else can I do?

l2ridehd · 16-06-2015, 12:29

How is the battery? There is only a very small difference between how a diesel engine will crank over and not start and when it will. If everything else looks good after you change the bad glow plug, get a new battery. I have seen this fix this exact problem several times.

sailalibi · 16-06-2015, 12:53

The l2, yes I replaced the start battery with a 680 CCA one. It is the biggest one they had...I'm in the Bahamas now with no engine...lol

keepondancin · 16-06-2015, 12:59

Any chance the compression release is open just a small amount? Fuel shut off pushed in all the way?

sailalibi · 16-06-2015, 13:08

I verified that the shutoff lever actually stops and starts fuel flow at the injector pump and the decompression lever is shut..my compression test shows good compression.

boeing1 · 17-06-2015, 08:09

have you checked your fuel, possible water in your fuel, from everything else that you checked it should start, in your location do not think the glow plugs are the issue,

seasick · 17-06-2015, 08:31

The glow plugs are more important than some might think on this particular motor that has a pre-combustion chamber. I would pull all the glow plugs and test each straight to a known, good 12VDC source.

You will find a greater variety of info on this motor by searching the Kubota D11 sites.

seasick · 17-06-2015, 10:02

Further to my previous post. I meant the Kubota D-1101 and later the D-1102 block.
A good initial test is to check the voltage at the glow plug wires with the circuit energized before going through the hassle of pulling these plugs.

MarkSF · 17-06-2015, 10:45

There are two things that I have experienced, cause a non-start condition on my 5424 :

1) Glow plugs not working for some reason.

2) Some trapped air in the injector pump.

So back to basics :

A diesel engine needs :

Fuel
Air
Compression / ignition
and glow plugs help when cold

So far I don't think you have eliminated the air factor, and the glow plugs.

Have you checked that there is nothing blocking the air intake? Did some mice set up a nest while you were gone?

A blocked exhaust would have the same effect as a blocked intake. Did a hose collapse?

While doing all this cranking, I hope you've had the raw water intake closed?

hamburking · 17-06-2015, 12:32

Here's one that stopped my engine...a spider nest in the fuel tank vent. With no vent, the fuel tank soon became a vacuum. So even though everything worked, no fuel would flow...so no go. When I finally "blew out" (with my mouth) the vent line, suddenly everything worked again.

My bet is a fuel problem. Try fresh fuel in a gerry can, using a spare hose directly to the engine.

Please let us know what happens.

As a last resort...just sell the boat where it sits.

NCboatrx · 18-06-2015, 05:10

Sailalibi, if your compression test only provided 300 lbs, I suggest that the first thing to do is adjust the valves. This may help a bit if they are too tight.

Your engine should have 448 PSI compression if all is 100%.
The minimum compression for ignition is 337 PSI.

MarkSF · 18-06-2015, 07:11

Quote:

Originally Posted by NCboatrx

Sailalibi, if your compression test only provided 300 lbs, I suggest that the first thing to do is adjust the valves. This may help a bit if they are too tight.

Your engine should have 448 PSI compression if all is 100%.
The minimum compression for ignition is 337 PSI.

The specification for compression ratio is 21:1, which is 305 PSI.