have been running my 310 with no engine problems for 10 years (500 hrs) and now i'm going crazy. engine runs for a while and then stalls. have done: rebuilt injectors, changed both fuel filters, new lift pump. got a little better with each fix but still not reliable. i'm thinking to pump out all the fuel and refill with fresh. any ideas?
M25xpb woes
- Thread starter oldguy
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How long has the fuel been in the tank?? You're probably on the right track since there's been improvement with each fuel related fix. If you empty the tank, and you have a view port make sure the tank is clean too so it is not all for naught. Any other symptoms??
left 3/4 tank in over winter. neglected to add stabilizer (my bad). filled with fresh last month.
what's a view port?
how does bad stuff get through the filter?
oldguy,
I've been running our M25 without stabilizer since 1998, only add biobor and sometimes water displacement stuff. I have found diesel fuel doesn't "go bad" like gasoline. Just my experiences.
Have you checked to see if the fuel pickup screen has been removed from your fuel fill line inside the tank?
There's a handy "Critical Upgrades" topic that covers a LOT of M25 series engine issues that you may find helpful: http://c34.org/bbs/index.php/topic,5078.0.html
One of our technical gurus has recently replaced his M25XP with a b (after over 5,000 hours on his original 1988 engine). I am sure he would be more than glad to help you out. As I've mentioned here on this board a number of times, our engine systems are almost identical. While our guru doesn't read any other boards than our C34 Forum, please feel free to join us there, post your question and I'm sure he'll respond with helpful suggestions.
Stu [just another "old guy"
]
I've been running our M25 without stabilizer since 1998, only add biobor and sometimes water displacement stuff. I have found diesel fuel doesn't "go bad" like gasoline. Just my experiences.
Have you checked to see if the fuel pickup screen has been removed from your fuel fill line inside the tank?
There's a handy "Critical Upgrades" topic that covers a LOT of M25 series engine issues that you may find helpful: http://c34.org/bbs/index.php/topic,5078.0.html
One of our technical gurus has recently replaced his M25XP with a b (after over 5,000 hours on his original 1988 engine). I am sure he would be more than glad to help you out. As I've mentioned here on this board a number of times, our engine systems are almost identical. While our guru doesn't read any other boards than our C34 Forum, please feel free to join us there, post your question and I'm sure he'll respond with helpful suggestions.
Stu [just another "old guy"
]oldguy
New woes book..............
http://www.westerbeke.com/OnlineManuals/200550%20Ed.%202%20Universal%20M3-20B%20through%20M-50B%20Operator%20Manual.PDF
paulj :troll:
New woes book..............
http://www.westerbeke.com/OnlineManuals/200550%20Ed.%202%20Universal%20M3-20B%20through%20M-50B%20Operator%20Manual.PDF
paulj :troll:
Stu:oldguy,
I've been running our M25 without stabilizer since 1998, only add biobor and sometimes water displacement stuff. I have found diesel fuel doesn't "go bad" like gasoline. Just my experiences.
Have you checked to see if the fuel pickup screen has been removed from your fuel fill line inside the tank?
There's a handy "Critical Upgrades" topic that covers a LOT of M25 series engine issues that you may find helpful: http://c34.org/bbs/index.php/topic,5078.0.html
One of our technical gurus has recently replaced his M25XP with a b (after over 5,000 hours on his original 1988 engine). I am sure he would be more than glad to help you out. As I've mentioned here on this board a number of times, our engine systems are almost identical. While our guru doesn't read any other boards than our C34 Forum, please feel free to join us there, post your question and I'm sure he'll respond with helpful suggestions.
Stu [just another "old guy"
what's a fuel pickup screen? no one but me has worked on the boat, so if it was there when i bought it (new) then it's still there. should i remove this and check it for blockage? is it in the feed line to the engine?
og, read the link, fuel pickup screen in the end of the fuel hose from the tank to the engine. Only way to know is to look. I don't know if the C310 skippers have experienced this "issue" on their boats, but it is something to check if you're gonna be down there anyway. It's at the end of the fuel line inside the tank.
They sell an access cover here
http://shop.catalinaowners.com/prod.php?15502/Tank+Access+Plate+System
http://www.seabuilt.com/demo.php
I put a 6" one in my boat.
Stu, I never saw a screen on my pickup tube. Did you remove yours? What did it look like?
http://shop.catalinaowners.com/prod.php?15502/Tank+Access+Plate+System
http://www.seabuilt.com/demo.php
I put a 6" one in my boat.
Stu, I never saw a screen on my pickup tube. Did you remove yours? What did it look like?
Attachments
On page 2 of the earlier linked "Critical Upgrades" topic is another discussion of the fuel line pickup screen.
http://c34.org/bbs/index.php/topic,1213.0.html
I can give ya the links, but I can't make you read them...:naughty:
well, after many $100 and a lot of work I finally solved this problem. The Raycor fuel filter on the bulkhead behind the engine has a manual pump in the inlet to the filter, probably for refilling the filter after inserting a new cartridge. This pump is a rubber plunger that rides inside a brass cylinder and is actuated by unscrewing a knurled plastic knob on the top of the filter and pull/pushing the knob. In normal operation the fuel flows around the soft rubber edges of the plunger into the filter. I found these edges to be covered with a sticky goo that was adhering to the brass cylinder and obviously restricting the fuel flow. Removed, disassembled and cleaned the Raycor to solve the problem.
Lessons learned: put fuel additive in before storage, maybe inspect/clean this little manual pump every couple hundred hours of operation.
other things I did before this: changed the Raycor cartridge (it was pretty dirty but not cause of problem), changed engine spin-on fuel filter, rebuilt injectors (they were dirty but not cause of problem), replaced fuel lift pump (old one probably ok), removed/inspected the two fuel tubes in the tank that led out to the tank exit valves (no screens or obstructions here.. difficult remove operation).
thanks to all for suggestions. hopefully someone will find this experience useful.
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