1gm10 yanmar

[gd7hej]

hi,coming back from whitehaven at the weekend,we lost the wind.so went to start the engine,the engine would not turn...i tried it with starting handle it would turn then stop and was quite difficult to turn the rest of the way,it would turn okay with decompression lever upwards??any ideas??seems something was stopping it.it is running okay,a couple of very stiff turns she started on the key again..please help..regards graham..

 

[chippie]

Are you sure you werent just coming against compression? The decompressor lever would enable you to go past compression . What is different from what you have done before?

 

[gd7hej]

Hi okay when i turned it normally i had to use both hands and a lot of weight on the handle.this was really abnormal,the starter would not turn it...regards graham

 

[airbubble]

Looks like some fluid (water or fuel) had entered. When turned against compression it blocked, when you opened decompression lever you pushed most of it out and were lucky. Question remains why/how did it get in ? Leaking injector is one cause for a bit of fuel, which from your story looks the most likely to me. If it was water, it is normally so much that you have to do more to get it out and running again.

 

[jfkal]

Sounds like fluids in the combustion chamber. Would take of the head and check the head gasket. Had similar problem. Leak was too small to cause major compression loss but did still suck water in after the engine was stopped.