My first post, been following a lot of content for years. So thanks for any input!
I have a Worldcat 266 with twin Honda bf200 (2008)
on one of my motors I have a really weird 3800-4000 rpm surging like it’s starving for fuel. Falls on its face flat if you try to add throttle. But rpms slowly decrease if you just “leave it”
wierd thing is fuel pressure is at 45psi and all fuel lines/filters check out.(new) but the problem only happens after running for 45mins - 1 hour. So that rules a fuel problem/filter out in my mind. (That’s about 10 gallons gone through the system)
checking everything yesterday I pulled the plugs for curiosity and half of them the tips were almost gone. These are NGK IFR6k11 (should be compatible with IFR6F.)I replaced these plugs beginning of the year maintenance.
im going to throw the old NGK IFR6F in this weekend and try it out- but if sparkplugs are bad it would cause surging right away right?
my question why are plugs tips almost gone?and chalky white(maybe 50hours on them? Tells me it’s running to lean?)I checked the ecm by jumping the plug but no codes-—
And surging after an hour of running only? I don’t get it.
thanks for the responses.
unfortunately shops are 6 weeks out at a minimum to look at a boat. And I have a feeling It’s something easy.
I have a Worldcat 266 with twin Honda bf200 (2008)
on one of my motors I have a really weird 3800-4000 rpm surging like it’s starving for fuel. Falls on its face flat if you try to add throttle. But rpms slowly decrease if you just “leave it”
wierd thing is fuel pressure is at 45psi and all fuel lines/filters check out.(new) but the problem only happens after running for 45mins - 1 hour. So that rules a fuel problem/filter out in my mind. (That’s about 10 gallons gone through the system)
checking everything yesterday I pulled the plugs for curiosity and half of them the tips were almost gone. These are NGK IFR6k11 (should be compatible with IFR6F.)I replaced these plugs beginning of the year maintenance.
im going to throw the old NGK IFR6F in this weekend and try it out- but if sparkplugs are bad it would cause surging right away right?
my question why are plugs tips almost gone?and chalky white(maybe 50hours on them? Tells me it’s running to lean?)I checked the ecm by jumping the plug but no codes-—
And surging after an hour of running only? I don’t get it.
thanks for the responses.
unfortunately shops are 6 weeks out at a minimum to look at a boat. And I have a feeling It’s something easy.
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