FF
Guru
- Joined
- Oct 12, 2007
- Messages
- 22,552
I have heard lots of arguments on why such units are unnecessary, but I haven't yet heard arguments that are particularly convincing for trawlers operating at trawler rpms.
it is just running at trawler rpms, so it has less efficient combustion resulting in more soot. Does this mean the engine is too big for the boat? No, it just means it is a trawler hull, where 40 hp is required to run at 7 knots and around 2.5 gph, but requires 240 hp to run at 9 knots burning 12 gph.
You answered your own queery , constant or long term underloading will load the oil with soot , combustion by products and increased cylinder damage.
Clean oil , weather from better filtration will help , but more frequent oil changes will still be required to remove the chemical contaminants.
Weather the rings will break free from soot lock and wear away the burnishing from the cylinder is doubtful , and even then,the oil holding hone scratches can not be restored without a partial overhaul.
FF
it is just running at trawler rpms, so it has less efficient combustion resulting in more soot. Does this mean the engine is too big for the boat? No, it just means it is a trawler hull, where 40 hp is required to run at 7 knots and around 2.5 gph, but requires 240 hp to run at 9 knots burning 12 gph.
You answered your own queery , constant or long term underloading will load the oil with soot , combustion by products and increased cylinder damage.
Clean oil , weather from better filtration will help , but more frequent oil changes will still be required to remove the chemical contaminants.
Weather the rings will break free from soot lock and wear away the burnishing from the cylinder is doubtful , and even then,the oil holding hone scratches can not be restored without a partial overhaul.
FF
