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I just bought a used Pontoon with an 08 mercury 25hp 4 stroke EFI. I had the issue where it would start up when cold but if you shut it off after running for any amount of time it wouldn’t restart without sitting for a long time. I got a Tupperware bin full of things with the boat and I noticed an old fuel pump in the Tupperware. I also noticed a ground was teed into the fuel pump connector. I checked fuel pressure and I had 43 psi and figured fuel was fine. If I sprayed carb cleaner in the intake it wouldn’t pop off at all so I figured I wasn’t getting spark. Checked with a spark tester and sure enough no spark. I figured my ECM was toast after ohming the pulse sensors and getting measurements within specs. If it wasn’t for your video I never would’ve realized that the previous owner must’ve replaced the fuel pump and when the fuel pump was pulling too many amps and overheating the ECU it was causing a no spark condition. I added a diode suppressed relay to power the pump and so far it has started up shut off and restarted several times. I’ll have to report back after hitting the water again. Thank you so much for your video! Life saver!!

Thanks for the info! Should the fuel pump be running when ignition is on, prior to starting?

Tjay, sent you an email on this. appreciate the video and hope to hear from you.

He is the man , super awsome video

I just changed all 3 u joints and carrier bearing. I'm concerned because the rear u joint that's held in with the straps has some play in it. Are there supposed to be any snap rings on all 4 sides?

So the ECM isnt fried???

God damn! Using centrifugal force to keep it suspended in the filter!

Thank you sir. I have to do this tomorrow. I'm taking the alternator out and the radiator fan out. I couldn't get anything on the tensioners without hitting the shroud. A word on Diesel Engineers. I used to think lawyers and politicians were the worst people in the world. Diesel Engineers give Saddam Hussein a run for his money as the worst humans.

Sorry for not understanding fully but my mechanic told me my ECM needs replaced after an issue following fuel pump replacement with a aftermarket pump. Would this work if the "ECM is bad" according to him?

Just a hot wire to the Ignition and grown your done

I have a 2003 60hp 4 stroke mercury motor with a fuel pump that runs str8 through and i can't figure out what could be causing it. The beep that should come on exactly after turning the key on the control starts after like 20 seconds after i turn the key and when it comes on it beeps for a long time stop and starts back again. the only time my fuel pump stops is when the peeping stops and that's because the beeping only stops for a second. what i'm trying to figure out is if the problem is cause by my ECM, the Vevor control i bought off Amazon or is it just my fuel pump. please can someone help me with this issue? i'm really in a bad place right now.

Mine is a 2012 df115 . Will this brush kit work? Thanks

Fantastic video. Exactly what I was looking for. Thanks buddy.

I'll try this thanks

Tohatsu outboard does not get gasoline into the cylinders. The injector, ecu, spark plugs are intact. When I pour gasoline into the pistons, it works a little. When I press the starter, oily gasoline comes out of the exhaust. Could the high pressure pump have malfunctioned? How can I test it? Greetings from Istanbul, Turkey..

Wow how am I just finding this video whit all the looking around for a used ECU? Any chance I can still get the wiring diagram? Thank you sir. You may have just saved a motor and my sanity.

What did you go with to replace it ? Like brand or oem, about what was the cost for your compressor and dryer?

I have the same problem with my Tohatsu TIDL 70Hp will this work on my motor. It also has a bad ground to ECM

Would the compressor removal/installation be easier with the radiator removed? That's also my list of things to do so I'm wondering ig doing them at the same time would make sense. Nice video. Really helpful!

How many hours on the tractor when it started to leak? Great video

im having a issue kinda like this i have 12 volt at ground when the engine is off but when it starts it goes to 9 volts then to -2 volts is this normal for these engines?

There’s not a crush sleeve in this axle.

Where did you purchase the parts from. I have a 2016 300hp AP that’s giving me some issues trim and tilting .

"promosm" 🎉

Great tip, thank you Sir! I will use this technique for oil changes on my vehicle with sideways filter mount.

Great Race !

i have the 2008 version with no starter set up. used aftermarket fuel pump and have similar problem. can this happen to my setup

Worked like a charm! TYVM!!!

Hey man I know this is an old video but I’d greatly appreciate it if you could send me that diagram of you still have it thank you!

I wonder how well this will work with 0W16 oil (my car)? Maybe I’m about to find out?

Thanks!

We’re are you located

Hi Jay, I have the same problem. Does the 12v positive wire for the pump also come from the ECU? Should the positive pass through a relay too? Thank you

Did the engines oil light and beep sound come on before this fix?

We’re are you from I’m having trouble with mine

What a POS Fords better idea

Oh, this is a walk in the park compared to the 6.0L... What a pain that one was. Thanks for the video

You should redo that video with it wired right

It lookes like both ground wire from bolt and wire to pump are on same pin, if so there is no delay on ground.

where does the wire from bolt ground, hook to on relay and the wire on the trd relay to the ground on pump relay pin?

I’m needing to replace the PCV Valve Hose. Would I be able to do that using your process? My truck leaks oil and a diesel mechanic told me these hoses fail often and people assume the oil is leaking from the oil pan. Any suggestions?

I have gotten a ton of messages about more specific questions about wiring. Cut the original plug (2 wires) that plugged into the fuel pump/VST tank. Be sure to leave enough room on both sides to allow for a butt connector. It had a blue wire and a blue/black wire. 86 on the relay should be wired into the blue wire that is on the engine wire harness side (back to the ECM). ANd 87 on the relay wired to the blue wire on the plug side that plugs into the fuel pump. The blue/black wire on engine harness side (back to ECM) will now be left bare. The blue/black wire on the fuel pump plug should go directly to engine ground (use any bolt that's grounded) as well as to pin 85 on relay. and 30 on the relay should go to your constant 12v+ power source (fused of course) and I used the hot side of the starter relay.

Just had the exact same problem show up today, 2nd time running motor after replacing the HP pump. Man I wish I knew this before buying the aftermarket pump. Was your ECM still good aside from losing the fuel pump ground?

i have a 60hp 2015 with bad pump , i wanted to bypass the original relay all together , what part number or under what name did you use to get the plug for the fuel pump ( black plug with 2 blue wires going into yellow plug) thanks

Thanks for the video! How would you conect/wire a diod inn to protect the ecu? Do you have a diagram for that?

Could you send me the wire diagram for this please , I have the same problem

Definitely a first or second place car if you started further up front or had more laps 💪🏼💪🏼

Exciting !!

Do you know where I can get one of these ECU's used?

I have 2001 Mercury Optimax and the ground wire from the ECU is bad. I had thought it was the fuel pump and replaced it. When I started it up the engine didn't fire up. Like you I checked the power wire and not the ground wire. A new ECU for mine is $1,700. If I can do what you did it will definitely save me a lot of money. So how has your customer's boat been holding up? Let me know cause if it's still good I'll be doing what you've done in this video. Thanks!