of an o-ring kit. It will get you out of all sorts of problems on a boat
, and cost little more than ordering one o-ring from Yanmar.
I can't speak to your particular engine, but I recognize that Compass790 speaks with wisdom. It's not rocket science, and a bit of exploration on your part will pay off in understanding your engine. Just remember that you are dealing with high pressure components, so the cleanliness and assembly standards are higher than for ordinary mechanical repairs
. Be careful to learn/record the order of re-assembly as you take it apart, and safely store each little gismo as it comes off, rather than having to search for it in the bilge
. At the very worst, and it won't happen, you might end up needing a more experienced mechanic
to put it back together correctly.