The 2GM does not have a drain plug in the oil pan, end even if it did you probably couldn't get to it easily.  Over the past few years on Rhapsody, I've labored with a hand pump trying to coordinate keeping the suction tube in the dipstick hole, keeping the discharge in the 2 liter soda bottle, all while pumping the hand pump to extract the oil.  More than once I got oil all over because of my lack of coordination keeping everything in place.

 

The recommended solution is a hand operated vacuum pump that has a plastic covered flexible steel suction tube.  I fount this on eBay - the "Pela 2000 Oil Extractor"  and you can buy it for around $30.  This holds 2.5 liters which is adequate for the 2GM. 

 

I used shrink sleeve to mark the suction tube so I know it is inserted to the bottom of the oil pan and not hitting the oil sump pickup.  This distance is 8.25" from the surface of the block in a straight line where the dipstick is inserted to where the tube hits the oil pan.  I used a 1/2" length of both Black & White shrink sleeve with the transition between the two shrink sleeves positioned 8.25" from the end of the suction tube.

 

 

 

 

The next picture shows the suction tube inserted in the block.  The white/black shrink sleeve transition is visible at the dipstick hole. The plastic covered flexible steel tube easily inserts in the dipstick hole and reaches the bottom of the oil pan.

 

 

Doing an Oil Change on the Yanmar 2GM

 

Tools Required:

• “Pela 2000” Oil Vacuum Pump with dipstick suction
• Rags

Note: oil filter should be hand tight only, but if it is too tight, you’ll need an oil filter wrench to loosen it

 

Parts Required:

• Oil - (2) Quarts 10W-30 Oil.
• Oil Filter Yanmar Part No. 119660-35150  (Fram PH3593A, Purolator PL14459,  AC  PF1127, Motorcraft  FL-810, Castrol CMP3593A, Quaker State   QS3593B)

Note: Oil Viscosity should be as recommended in Yanmar Service Manual for outside temperature ranges – SAE 10W-30 will cover you for most of North America for year round use.  If the water temperature is above 95 degrees, use 50W oil.  The service grade should be SAE CB or CC for moderate duty diesel engine service.   

 

Procedure:

1.      Operate engine to ensure block and oil are warm (not too hot, as you don’t want to melt the oil collection container)

2.      Remove engine access cover and slide to forward part of cabin

3.      Loosen Oil filler cap on top of engine for venting.  Remove crankcase dipstick and insert oil vacuum pump suction into dipstick pipe.

4.      Operate hand pump 5 to 10 strokes to create vacuum.  Oil will collect in pump holding container. 

5.      Pump should drain crankcase dry, then remove suction tube dipstick hole

6.      Put rags under oil filter (port side of engine) to catch oil drips and unscrew filter.  Remove old oil filter.  Clean up excess oil.  Apply thin film of oil to the gasket on the replacement filter, and install new filter.  Hand tighten only, approximately ¾ turn after rubber gasket contacts seating surface

7.      Fill crankcase with 1 quart oil.  Check oil level to make sure it is in acceptable range (see this Oil Dipstick Link from Yanmar Manual). And add oil as appropriate. 

8.      Insert and seat dipstick.  Tighten Oil Fill cap on top of engine.

9.      Start engine and let it run for 2 minutes – check for oil leaks and correct as necessary.

10.  Stop Engine and let sit for 2 minutes so oil drains to crankcase, then check oil level.  Top off oil level as necessary (probably ~ 1/2 quart additional).  Note the crankcase capacity is specified as 2.0 Liters (1 Liter = 1.05 quarts).  The oil filter also has some volume that needs to be filled that is not included in the crankcase capacity.

11.  Replace engine access cover

12.  Dispose of oil in a proper waste oil collection facility