Day 184, Engine base inspection and cleanup. Engine check at home, compression check.

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Freezing morning ans surprise ;)

Freezing morning in Texas

Little frost on the boat ;)

Engine mounts inspection 

Engine mount blocks was glassed to hull only on one side, and now completely de-laminated. glasswork was very dirty.

Engine was  screwed down to wood with lag bolts, water and vibration did their work, all 8 bolts was not hold and engine literally danced on the blocks.

Glass on cross member i just took out by hands.

One corner rotted for about 1/2" from the bottom. Will need to cut damaged wood and feel the gap before re-glassing blocks to hull.

Spent 3 hours in boat yoga positions to cleanup old fiberglass and prepare area for sanding.

Starboard side. (cross-member board just lay there)

Port side

top view. black wood is not a rot, there just surface contaminated with oil.


Engine

Assembled engine to state when i can start it. I just want to be 100% sure it still working after move and also check the exhaust smoke i saw on the boat.

Video of the motor running in the garage.

What I found:

Test with no load,  

Idle  - some noticeable vibration, but looks not bad.

Instant acceleration - some black smoke puffs, but looks pretty ok.

Run below 2000 RPM - no smoke, exhaust has almost no smell. Nice clean work.

Attempt to run faster looks like engine misfiring and shoots isolated white clouds smelling like not burning fuel. Higher RPM - more white smoke.


Then I pulled injectors. #2 get out really easy, For #1 I spent 20-30 minutes with wrenches,and screwdriver praying it to get it out. Likely thanks to "buster" I filled in injectors cavities day before. No puller or back hammer was required.

Found some carbon deposits on the injector nozzle, but looks just normal, nothing extreme.

Measured compression. 390-400psi in both cylinders.  

Engine has compression 20:1.

From one hand -  theoretical compression pressure for 20:1 = atmospheric pressure 14.7psi * 20 = 294psi.

From other Yanmar (engine manufacture) states compression must be 300-400.

My measurements looks like compression I have - excellent.

















 

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