Mountains of Colorado and Montana | At first it quit cranking but that was caused by a bad battery cable. Fixed that issue. Cranks fine now.
Plenty of clean fuel in the fuel tank, clean fuel filter. The electric pump is working. Checked the flow to the injection pump. Battery fully charged. Air filter clean and no obstructions in the air filter housing. Engine has strong compression and plenty of engine oil. Radiator is full of coolant.
This is a three cylinder Yanmar. I don’t have the engine technical info or tag photo to display.
This engine ran fine before when it was put in storage in a building approximately five to six years ago. I’ve found no signs of rodent damage.
I’m of the opinion that the problem is inside the injection pump. Engine has around 800 hours on the meter. Only getting flow to two of the three injectors.
Would a strong penetrating oil sprayed through the top of the injection pump where the three injector lines connect possibly help if left to soak several days and sprayed daily?
I’m not brave enough ( nor experienced with injection pump disassembly) to risk taking the injection punp apart to free up whatever is possibly stuck.
We did try holding a wooden stick against flat areas of the pump and tapping the stick with a hammer to set up vibrations with the hopes of it unsticking whatever inside the pump. So far it hasn’t helped.
When the engine is cranked, there is sign of smoke in the exhaust as it does nearly start. This engine has glow plugs so I don’t dare use any starting fluid. Prior to this present issue it always started and ran well before.
Edited by Tractor Mountain 11/25/2023 08:48
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Yanmar engine no start —need some help
