Checked all the fuel pipes, bleed screws, filters etc and no signs of leaks elsewhere and after motoring a short distance I can see a trail under the engine that does seem to be emanating from this part of the engine.2020.
#Yanmar 8 hp diesel fuel series#
But I'm surprised at the amount of fuel that leaks out. MARINE DIESEL ENGINES 8LV-320/350/370 Series NOTE: Fuel condition: Density at 15☌ 0. Like all mechanically injected diesels, the STP should not be run continuously below its maximum torque band or excessive injection advance could glaze the cylinder bores through unburned fuel. Traced it (I think) eventually to the lift pump where the flange/gasket at the middle of the "clam shell" feels wet. Yanmar recommends specific diesel engine sump oil at SAE 15W40 for all ambient temperatures and I’d suggest changing the oil and filter every 100 running hours or annually. On one occasion I spent a night moored to a buoy in rough conditions and although the engine was not running the fuel tank fuel tap allowing fuel to the engine was left open and in the morning the entire tank of fuel had leaked out under the engine! If an engine model does not have the Y in the beginning, the engine has a vertical cylinder or cylinders. Our generators create outputs of 4.5 to 10.2 KW.
Our water pumps boast a 550-1750 L/min output. So, when it comes to diesel water pumps and generators, we know what you are looking for. For a 2GM20 turning 2800 rpm with a 14dx12p prop cruising 6.3 knots, I burn just over a gallon in 2 hrs. We know diesel engines, tractors, CE equipment, industrial equipment and energy solutions.
The rule of thumb that Ive used is that you have 18 hp-hrs in a gallon of diesel. It will be shown to the Australian public for the first time at the Sydney International Boat Show. A persistent diesel leak of significant proprtions whereby after a day of motoring there is a fairly large puddle of diesel under my Yanmar 2GM20F. Yanmar 2QM15 fuel consumption Jump to Latest Follow 1 - 10 of 10 Posts. Yanmar has announced the arrival of the all new Yanmar 8LV series in Australia this is a V8, 4.46 litre diesel engine that will astonish boaters with its acceleration, fuel economy and low noise. So your total fuel consumption at 9 kts will be 6-8. So you will be pulling 100-150 hp from those engines which probably make about 18 hp per gph of diesel. I found it by searching as this seems to be the same problem I am having. I checked the curve for the 34T with a single Yanmar 370 against the propeller hp and fuel curve on Yanmar´s site and they were within 10 recognizing that the tests were done with a. Sorry to resurrect this long dead thread. Lastly is it best to just use a new gasket or also use a flexible gasket sealant? I have replaced the copper washers on the pipe (both washers both ends of the pipe) - still leaks - I have tried using a flexible sealant as recommended on this site also with the washers- still leaks - I am wondering now if the leak is actually coming from the gasket of the lift pump and if the leaking fuel then dribbles from the pump onto the connecting pipe which is why my toilet tissue test was showing diesel on the pipe (lift pump side only) - has anyone replaced the main gasket to the lift pump and is that likely to be the source of the leak?įrom what I can see the lift pump is secured to the block by 2 bolts and is operated by a lever so I guess should be easy to remove and replace (even with the tight access to that side of the engine) - the top of the lift pump appears to be held in place with set screws so again guess should be easy enough to take apart - replace gasket - and reassemble but before doing so wondered if anyone has experience of this as a leak point and if replacing the gasket is likely to be as easy as I am hoping (and most importantly fix the leak) The leak does not stop the engine starting or runnning but after running for a few hours we get a few drops of diesel fuel under the engine and by wrapping toilet paper round various pipes I thought I had narrowed down the leak to the fuel lift pump connecting pipe running to the yanmar fuel filter close to it, Our boat has a yanmar 3gm which we find superb - except - for one irritating thing - our engine has a very minor fuel leak which I am struggling to find and cure!
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