mercury efi failure problem?? please help suggestions needed
 

225 merc efi injected , runs great at idle , when throttling up to over 2k rpm it loses power and stalls. Put back in neutral and it fires right up! Go to throttle it wont even get on plane and same thing loses power and stalls

Re: mercury efi failure problem?? please help suggestions needed
 

Not sure if same. Likely yes.

In Bombardier- Evinrude/Johnson when have computer problem or overheat problems they rev limit it. Sounds like it'll rip itself to pieces if you throttle past 2500 rpms. It's a "get you home" feature.

May likely be the same thing. If so it's likely not the fuel injection at all. They have computer diagnostics will tell you problem in 60 seconds.

Try Anglers in Sea Bright if you're looking for GREAT Merc work

Re: mercury efi failure problem?? please help suggestions needed
 

Is there any audible alarm when this happens?? Is so, like Frank says, it could be going into safe mode... That limits the RPMs when the engine detects an issue like lack of oil or overheating.

If not, sounds like it might be starving for fuel. First thing I would try is running it off a portable tank. If it runs OK then you know you have an issue in your fuel system on the boat.

Once you elimate the fuel system on your boat, I would take it to a mechanic with diagnotic tools to trouble shoot.

Re: mercury efi failure problem?? please help suggestions needed
 

What year is it? Is it a DFI with the high pressure injector on top?
I had a pair of 2002s and the compressor went on top and did same thing basically.

Re: mercury efi failure problem?? please help suggestions needed
 

No alarms , at all , it revs up and shuts down , no warning ! But motor completely shuts down .....turn key and starts right back up. If i put in neutral and rev up i can get it up to 5000 no problem. If i rev up under load it shuts down........

Re: mercury efi failure problem?? please help suggestions needed
 

I would just call mercury I have a 2005 optimax I had some problems with they told me everything to check out over the phone. I ordered the part and fixed it myself saved a lot of money. They have good customer service this is my first mercury. It won't hurt to call and see if they can help good luck +1-888-427-5373

Re: mercury efi failure problem?? please help suggestions needed
 

Bassappeal aren't you local to Neptune area?? It's that or Pa I'm not sure, may have a guy with the merc puter if your close...email me for #

Re: mercury efi failure problem?? please help suggestions needed
 

D fish im located in old bridge nj middlesex county , boat is located in matawan nj close to keyport

Re: mercury efi failure problem?? please help suggestions needed
 

Called mercury , and they told me more or less its a fuel issue if no alarms are sounding ....so i have to run through my whole fuel system start to finish and check everything ....to be continued

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Dfish if you guy is local and can run a diagnostic or let me borrow the tool please let me know ...the engine is 1996 ...

Re: mercury efi failure problem?? please help suggestions needed
 

Bass
Seen a similar issue with a faulty fuel tank check valve. There was enough flow to run the engine but not under a load. The valve is normally located on the elbow of the fuel line where it leaves the tank. Good luck, hope this helps.