Thanks Dan for your comments. BTW, your boat name is pretty funny
for people who have been to Singapore
. Seems like every sentence in Singapore
ends with Lah... I digress there.
Let me clarify the picture in my previous post is not from mine engine but someone else's picture I used to illustrate the location of pitting near the valve (I did not bring my camera
on the day I checked out the engine.) The pitting on the cylinder wall are not on the block deck. However, the pitting around the tip of the cylinder wall does surround the pitting in the head (around the valve). In both locations the pitting problem on the engine I am checking out is far better than the picture.
The owner resurfaced the head and did a valve job. I am not sure how much material was taken off the head. Hopefully not enough to cause excessive compression. The owner did not resurface the block deck. It appears to be in very good condition when I inspected it visually. I don't know the year of the engine but it appears to be in very good condition. I think the Yanmar 2GM20F were manufactured in mid 1990's.
The owner did suggest a bottom end overhaul. I will decide on my next step after I make my decision to buy it (or not).
My Atomic 4 is in a very good condition. I have always babied it. Previous maintenance
and upgrade work include -
1. Valve job (including new springs)
2. Resurfaced the head
3. New head gasket
4. Rebuilt mechanical fuel pump
5. Rebuilt carburetor (2 times)
6. Changed oil
7. Acid flushed it every 3~5 years
8. Electronic ignition
9. New alternator
10. New spark plugs and wires every 2 years
11. New primary and secondary fuel filter
and filter element every two years
12. New distributor cap every 3 years
13. New coil
14. New water pump impeller every 2 years
15. New water temperature sender
16. New water lift muffler
I am considering repowering because I am planning to do some coastal cruising in the not too distant future. I also recently added a propane
stove. Having two different types of volatile fuel
on my small Pearson
Triton makes it a little uncomfortable for me.