Volvo Penta 2001 engine

[Quirk]

I have a dehler 28 with a Volvo Penta 2001 engine. The engine cuts out after about 20 seconds if I set to the throttle to the maximum setting. This does not usually happen if the water is dead calm, however, once it has happend on any particular day, the symptoms can be simulated while moored up on a pontoon with the engine in gear at maximum revs. Does anybody have any idea what could be causing the engine to cut out.

We have tried all of the obvious things; the fuel line and filters have been replaced and the lift pump has been replaced.

 

[kspirit53]

It is almost certainly fuel starvation which can be caused by any single component of the fuel supply system not functioning effectively at maximum revs. Given that you have checked/replaced filters, pump and fuel lines, it could be the injectors which need cleaning. Personally, I would not go to this expense given the problem only occurs at max. revs. Suggest you keep revs down instead although I accept this could be a concern should max. revs be necessary.

 

[Kawasaki]

When the engine is at max revs it is asking the fuel system to deliver at max capacity.
Agree with kspirit. Possible air been drawn into the system.
You mention fuel filts etc have been checked.
I would double check the parts that have been removed are "sealed/seated" correctly.
Choppy conditions making the symptom more pronounced would suggest that movement of a fuel pipe or connection is dodgy.
Is the fuel tank vent(presuming you have one) clear?
If rough conditions stirred up muck in the tank or filters, one would think said crud would still be present somewhere in the system when calm.
After the 20 second burst when She cuts out ,how difficult is the restart?

 

[pvb]

Another thought...

I don't know whether Dehler use the Volvo fuel tank connection plate, but if so the fuel pickup pipe has a fine mesh metal strainer at the end. In roughish conditions, sediment stirred up in the tank could partially block this strainer, leading to fuel starvation under load. It looks like this:-

 

[BobOwen]

I had similar problems with a 2001 earlier this year.
The engine would start (Though not as well as previously) and would die as the throttle was wound to max.
As mentioned, it really can be almost any element of the fuel system. I checked every element including the lift pump too, but in my case it was finally sorted with a complete clean and re shim of the injector.
Cost was around £50 for the injector clean / setup if I remember correct.

 

[andy_wilson]

Most obvious answer is something to do with all the bits you have disturbed.

What you describe could well be atributed to an air leak on the suction side of the fuel supply.

At normal throttle it manages to self bleed small amounts of air, at full throttle more air is sucked in until the bubble is so big it is not pushed through, it just compresses.

Can be quite intermittant. Often it can lead to a serious falter or loss of power, followed by recovery.

Re-check all fuel connections prior to the lift pump.

 

[Quirk]

There is no problem in restarting the engine after it has cut out in this way.

The reason that I need the extra revs is that there is a very strong tide in Poole harbour entrance and an awful lot of traffic at weekends - it can be very unnerving to be only making 1 knot over the ground when others are charging through at up to 10 knots.

 

[Rustyknight]

[ QUOTE ]
it can be very unnerving to be only making 1 knot over the ground when others are charging through at up to 10 knots.

[/ QUOTE ]

10kts plus in many cases!!!!

Having kept the boat in Poole for 15 or so years, I find I quite enjoy it sometimes.... /forums/images/graemlins/laugh.gif (and I can only manage 5K through the water)

Of course, the easy answer, if you really don't like it, is to time your entrance to avoid the mad rush out to Studland, or the mad rush back in. Both events seem to be tied to the times that Poole Bridge lifts.