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honda 225 2002 need help motor seems to be starving for fuel or surging

aristakat

aristakat

Regular Contributor
Replaced filter all replaced HP pump
Cleaned vst tank
Surges under load
Pulled lap pump didn't see anything wrong
Seems like fuel bulb gets soft when pumped motor runs better

Any suggestions where to look ?
 
Sounds like air may be getting into the fuel system.
Check all fuel line connections from fuel tank forward, especially at the external fuel water separator and the drain cock.
Remove and check LP fuel filter.
Check seals at both the onboard fuel/water separator and the LP fuel pump.
Install piece of clear hose in fuel line just in front of onboard fuel/water separator to see if you are sucking air into the fuel system.
If all that checks out and if you have access to a fuel pressure gauge and the proper fittings, remove the fuel pressure relief bolt on the HP fuel filter and check fuel pressure - it should be between 41 and 48 PSI. If not, then your LP fuel pump is likely faulty.
 
ok update
switched lp fuel pump to other motor to see if it was lp pressure pump . no change
swaped fuel lines to the other motor still port failed same issue/ no change
we checked last nigt t lp pump visual looked find . I have replaced fuel separator along w seals
 
I am stumped anyone got any ideas ?
we didn't open float in vst tank screws seems to strip,,does any one think issue in there ? we could here float move up and down
 
Jamie,

OK, understand that you switched the LP fuel pump, installed a new HP fuel pump, and switched fuel lines. Correct?

You wrote: "Seems like fuel bulb gets soft when pumped motor runs better"

So it still sounds like you are getting air into the fuel line. Sometimes that can be very difficult to find. While running with the hood off, see if you can observe the LP fuel filter bowl to see if it is staying full or nearly full. (I know that might not be possible with your cat.

Are both motors coming off the same fuel tank? If not, then check for clogged fuel tank vent and clogged pick up tube. If so, that eliminates a clogged vent or pick up in the tank. Where do the fuel lines separate? Do you have a separate fuel/water separator for each engine? If so, check connections, seals, and drain cock.

Look for air bubbles in the fuel lines by using a clear plastic hose with the same inside diameter as your current fuel line. Initially connect clear fuel line to onboard fuel-water separator. If no air bubbles there, then make a connection after the LP fuel filter to the LP pump. If no bubbles there, connect from the LP fuel pump to the next device, and so on until you get to the VST.
 
ok
1, tanks our separate per motor( problem seemed to show up after I filled tank full at end of first day us w ful
2 yes switched lp pump to other motor ,took lp pump off good motor problem didn't follow the pump
3, if get airin fuel lines wouldn't the fuel bulb collapse ?
4. Is there any filter in the VST ? ( where the float is)

thanks for imput this has got me stumped
 
You wrote: "3, if get air in fuel lines wouldn't the fuel bulb collapse ?" NO. Just the opposite - it would stay spongy. Note that when engine is running, the primer bulb will get soft, but not real "spongy." The primer bulb will collapse when there is a clogged fuel vent or a clogged fuel tank pick up tube. You should check both if you are getting a collapsed primer bulb.

You wrote: "problem seemed to show up after I filled tank full at end of first day us w ful" Normally, there is a check valve at the top of the fuel pick up tube. That could be stuck partially closed or clogged. If you have one, pull it out and shake it. If it doesn't rattle, replace it. (Not long ago someone on this forum talked about throwing away the check valve, connecting the fuel line directly to the pickup tube, then installed an aftermarket check valve further up the fuel line where he could get to it more easily.)

There is no filter in the VST that I am aware of. However, there is a screen underneath the HP filter, if I recall correctly and someone previously wrote about a screen under the HP fuel pump, but I have never had to replace mine, so I don't know for sure.

Once you have done all of that and if the problem still is not resolved, take a look at your fuel pressure regulator. If you have the Helm shop manual, take a look at pages 5-83 & 5-84.
 
Correct, there is a fuel pump insulator that has a screen on the bottom. I would be sure to check it out. Mine had a bunch of stuff in it the first time I checked it. FYI, it's a little tricky to pull it out and you may damage it. I would go ahead and plan on buying another one and the o-ring. Just a thought, could your problem be the fuel pressure regulator?
 
happy to say I decided to check o2 senor some of the issues compared to that problem once before.
seems to have fixed m problem second trip today .
 
I fought through similar symptoms for months trying to figure it out. Here is my thread, it may be helpful:
[h=3]2004 BF200 Surging/ Fuel Issues-Advice Needed[/h]
I would highly recommend splicing in some clear plastic tube right in front of the engine, my fuel system uses 3/8" and it was very easy to find and cheap by the foot from West Marine or any boating store. It will quickly and inexpensively tell you if the issue is with the engine or fuel delivery from the tank to the engine. Also, you can disconnect your fuel line after the water separator and plug it straight into a portable tank. When mine was having issues, it could run well for hours before acting up.
 
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