225HP HPDI boggimg issue

[Carlos H]

Have a 2004 225 HPDI that damn near left me stranded this past weekend on St Claire, 20 miles or so from the ramp.

Seems that when I would hit 3000 or so RPM motor would "bog" down and act like it was running really rough. Did not die, but ran BADLY..no power at all. Have major problems even getting on plane.

But, when I was sitting there thinking, I primed the buld with the cover off. I heard gas go into the two silver "pumps" that are on the side near the fuel filter. Gas was in the fuel filter and no problem there. But was odd I heard the gas going into the pumps.

Here is the strange thing. When I would prime the engire with the bulb, I could get it on plane at 3k RPM and if I did not exceed that RPM it would run ok for a mile or so. But, if I slammed the hot foot to the floor it woudl start to bog right off the bat.

I seem to remember reading something here about some sort of diaphram that goes bad?? Any ideas??

Thnaks fellas!!!


Modified by Carlos H at 9:24 PM 6/28/2006

[21XDC]

replace the primer bubl and see if the fuel pump diaphrams have holes/leak.... I bet thats the problem... Or you have water in the gas.

[Carlos H]

Mike,
Bulb was firm all the time, but will replace it, 17 boats ahead of me in line at the dealer..

Fuel filter was water free, I was able to look at that (that was my first thought also) and how do you check the diaphrams???

[Hamfisted]

Do you have a Racor installed? Was the primer ball collapsed when this bogging was happening? With the motor off can you pump up the primer ball firm? If not you probably have a bad mechanical fuel pump (there are two on the port side of the powerhead...). But what you describe does sound like one of the mechanical fuel pumps is bad. You can check the pump diaphragms by just unbolting the pumps from the block (but leave the hoses connected...) and pump up the primer ball to see if any fuel seeps out of the pump body. No fuel should leak out.
They're part number 6E5-24410-03-00 and about $35 apiece at the dealer.

Mike

Item #30 is the fuel pump(s) ....

[Carlos H]

Mike,
No racor installed.....

Ball was not overly soft or collapsed when it was bogging.

With the motor off the bulb can be pumped firm, with it running you can pump it and hear the engine make RPM changes sometimes, but still dies.

I have an extended warranty (just bought it three weeks ago) so, I hope they cover this for me...

[canadianchampion]

Had the same problem with my 250 it turned out to be the high pressure fuel pumps.If you are in Michigan call tom at Anglers marine 734-287-6180. Fixed the problem boat runs great.

[Blazenzeek]

Carlos

You've probably already checked this but when my plugs fouled, it did exactly the same thing. I know the symptoms aren't exactly typical of fouled plugs, but when mine did what you are describing, that's what it was. I have had plugs foul before on my old merc and it acted totally different than w/ the HPDI. Not sure if the HPDI can detect the misfiring and it cuts itself back or what but that's what it did. I hope your issue is as simple to resolve as mine was.

[wtgordon]

After all of my recent problems, I would have to think its a filter. Mine turned out to be part #13 in the pic above. It only takes a second to remove it and look to see if the fuel is draining out through the filter or simply dripping out. The new one cost me $27 and now I carry a spare in a zip lock bag at all times. You never know when you might get a little trash in your fuel.

[Hamfisted]

This is why I stress the importance of a Racor filter installed in the fuel line prior to the motor. You will save yourself a hundred headaches down the road by just rigging the boat correctly when the motor is installed. Dealers want to save that $50 for their bottom lines, plus it almost gaurantees you as a repeat customer in the service department. Pretty slick.


Mike

[Carlos H]

BZ, will pull the plugs and look at them tomorrow.

On advice of the filters, I went out and removed the entire filter bracket and all. Pulled off the boat to look it over, nada bad nasty in the filter at all. No muck, water, sediment, or fungus. Clean as a whistle.

But, after I pulled the filter out, cleaned it up and went to prime the filter again, no prime from the bulb...will go to dealer tomorrow and pick up a primer bulb. I swear it was working right on the water.........but seems to have failed the completly dry filter test....

Thanks again for the help fellas

[leeadams222]

mine did the same thing then blew up at shop now getting rebuild under warrenty. was shainking real bad and would only tur 3500 rpms

[Carlos H]

Hope that mine is nto goign to blow!! At the dealer now.....

[Carlos H]

update, yes the boat has been at the dealer all this time....he looked at it in the shop, no luck in duplicating the problem, took it out for a hour run/drive, can not duplicate the problem. He is going to call the Yammie folks tech line Monday to see if they know what the problem might be.....uugghhh my nightmare....

[skeeterbit]

Carlos
My 175 HPDI did the exact same thing. After Skeeter replacing the injectors, new plugs, cleaning the fuel system, turned out to be a fuel filter between fuel pump and injectors. Replaced fuel filter, no more problems for almost a year now. the computer will tell you that there is less pressure at the injectors than at the fuel pump Motor would crank fine and idle perfectly, but when you pressed the hot foot to the floor, it would bog down and almost quit. Let off and it would catch up again. Someone said that if you run it too long like this the motor runs too lean and will eventually blow. Check out this relatively cheap fix first.

[Carlos H]

skeeterbit,
Thanks for the information. Do appreciate it!

I am TAD right now, so wife is relaying stuff via email to me, but dealer said that the problem is with the VST tank. What the heck is that?? Not able to find that part other then a few cryptic references on google. They are installing a racor filter under the warrenty and I am hoping that this fixes it. But, after reading all the other google hits on the VST tank, that may be my problem.

I think they may have looked at the HP fuel filter earlier on.

Again, thanks for the help and will update this as soon as I get home.

[Bass Junkie]

VST= vapor separator

[Carlos H]

ahh thanks!!!!!

Found it, jese that looks liek the filter they were supposed toi relace on my winter service last year too....

[Carlos H]

ok, update from the Yammie shop today. Foudn out there are a total of three filters on the motor itself, and my VST was for sure contaminated. They did insall the Racor under warrrantym but on the final checkout it had low fuel pressure, was 42 PSI at idle, and supposed to be between 48 and 52. He is going to dump the ECO and see what it has been running. Getting closer anyway.

[Carlos H]

ok here we go...I paid for the Yamie YES warranty a month or so ago...yep you see where this is going.

They said they are not goign to cover the filters as it is a fuel problem and not a warranty issue...can you believe that crap?? I need call them and see why they did this, I paid lots of cash for the warranty to cover stuff like this.... the dang filter itself was 88 bucks!!!!!

Now, in Yammies defense, they did pay for the install of a prefilter. But here is the grabs for ya. it is a 10 micron filter, the filter that was clogged is a 3 micron filter.....so, if this happens again, I am hosed or what?

this ever happen to anyone else????

[EJP]

yammie paid for the pre-filter???? I have a '06 and no prefilter????