Mercury outboard ecu problems. Will fire with starting fluid in the cylinders (then dies).
Mercury outboard ecu problems The latest mechanic had two computers hooked up, and had trouble getting the engine to do it. Here are some things to check: 1. shiney. The fuel pump will build pressure with 12 bolts and a decent size wire. simonperformancetechnology. Mar 24, 2023 · In any case, it’s important to get your outboard checked out by a qualified technician to diagnose and fix the problem. Tony Brucato has been a pioneer in the outboard boating industry since 1994. I had the same issue. Motor will turn over but won't start. Sep 7, 2022 · Mercury EFI ECU Outboard REMOVAL (Could THIS be the PROBLEM?) – Still having trouble with my 1996 Mercury 175 EFI Outboard boat motor. I have power going to the ECU and comming out, I just dont have any activity or signal. Reading voltage between the two pump terminals as the key is turned on will tell you if the ECU is providing a ground. *LIFETIME WARRANTY *Free return shipping *Fast turnaround time My mechanic said I needed a new ecu for a 2000 mercury 225 efi. Mercury Mariner ECM Repair. The toughest part is that this is an intermittent problem. The repairs cost 595. Can't say I have heard of the problem (but ECU/ECM driven outboards haven't been around long enough to get a good handle on "what is likely" to start going wrong with them after 10, 15, 20 years etc), but you are correct in stating that the ECU controls the power to the electric fuel pump (and that relay or microswitch is internal - with "no user serviceable parts"). Mercury ECU/ACU/PCU Rough Idle Diagnostics Common Problems of Rough Idle: Radio Frequency Interference (RFI): Most commonly caused by use of non-resistor spark plugs. We are DFI Technologies, the industry’s leading computer module repair facility for outboard motors since 2001. The transmission may have a hard time shifting, or not even be able to shift at all. And see if the engine starts and runs normal. Starting Problem. Nov 7, 2011 · Mechanics checked everything; fuel pumps, power packs, stator, spark, injectors etc. A quick squeeze of the fuel ball and the problem is solved. Is the pressure regulator responsible for activating the ECU, and if it is not, what is. com Jan 26, 2022 · Before you do that, disconnect the fuel pump from the ECU, wire the pump to 12 volts. Poor Shifts. 5. Mercury Outboard ECU Programming: Q&A on 2000 Mercury 225 EFI and 200 EFI Problems NEW! Mercury ACU/ECU! Did THIS finally FIX my problem?? (Install & TEST!) - I've been battling motor problems on my 1996 Mercury 175 EFI for awhile now. 6 Most Common Problems with Mercury Optimax 150 Outboard: 1. www. 00 with a 1-3 day turnaround , and a 1 year warranty . So, I have listed the most common problems with Mercury Optimax 150 to help you solve yours. In fact, we’re the only manufacturer-recognized company that repairs Ficht Fuel Injection Systems, such as Evinrude, Johnson. Any help would be greatly appreciated. Have you modified your stock Mercury EFI engine by adding high performance exhaust, a bigger cam, a high flow flame arrestor, oradded a supercharger? Aug 21, 2015 · Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. Mar 29, 2024 · ECU modulates voltage to the ground side of the pump tests are outlined in the Service Manual for this circuit. *The ACU is more sensitive than some Stock Mercury ECUs, so it is imperative that Resistor Spark Plugs are used with the ACU. Jun 20, 2014 · So, I was forced to conclude that there was a problem in (1) the voltage sensing system that sends the information to the ECU, (2) the wiring between the voltage sensor (presumably inside the alternator) and the ECU, or (3) the ECU itself. If you find anything clean it w/a Q-tip and denatured alcohol. Nov 24, 2004 · The motor which is said to have a bad ECU has run fine, now and then it seems to lose it's prime at idle. I have purchased one and now the motor will not start. Mercury Mariner ECM ECU PCM. Brucato Power is the leading supplier of replacement ECUs for Mercury Outboard Motors. Will fire with starting fluid in the cylinders (then dies). Finally it lost power for them for about 20 seconds. I can ground the fuel pump and make it run and pump. Voltage is relatively low when not running or at idle. Had it running on the muffs just 2 days ago. Disconnect the battery then disconnect the plug at the ECU and inspect it. Unfortunately only Evinrude (BRP) and Tohatsu have produced motors in the lower/mid horsepowers which restricts your choices - with Merc available in the 75 horse and up and Yami producing only 2 models in the 150+ horse range. Oil Marine Mercury Brand; Oil Change Kits Mercury; Maintenance Kits 100/Hr; Maintenance Kits 300/Hr; Vessel View Mobile; Mercury | ECU | Package Quantity @ 1 | 77 Dec 4, 2023 · The Mercury Optimax 150 outboard: a two-stroke powerhouse known for its fuel efficiency, power, and legendary reliability. May 29, 2020 · A bad fuel pump, ignition problems, clogged fuel filter, bad mass airflow sensor, and bad crank/camshaft sensors are just a few of the problems that can cause an engine to not start. Idle out of boat ramp, then run WOT-5800 RPM for 20-30 miles. Second-Problem : Starts on first turn every time. New ECU fixed the problem but cost $850. 2006 Mercury 25hp 4 stroke. simonmotorsports. Conclusion: Mercury Mariner Bad PCM Symptoms Mercury Marine ECU Repair, Mercury Outboard ECU Repair, Mercruiser ECU Repair, PCM, ECM, ECU MEFI 1 2 3 4 Volvo Penta Simon Performance Technology May 13, 2013 · VST and high pressure pump are powered by the ECU. Send in your damaged ECU and we will diagnose it for free. 8 V comming from the ECU to the fuel pump. The Brucato ACU offers 15+ fuel curves that can be customized for your EFI motor application (1988-2001). I do not have 12V at the positive terminal of the fuel pump. Mercury-Mercruiser 898101T54 ECU, Engine Control Unit has been superceded to a new part number. Repair & Return. Let’s get started right away. Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor Jun 12, 2011 · I have 12. Nov 7, 2011 · Item 17 is the ECU wire harness. The ECU seems to control the pump velocity by changing the resistance to ground side of pump when running/ based on input from engine sensors. Tried new plugs. Feb 16, 2012 · First-Setup: 2001 Mercury 200 EFI, oil injection removed-using premix 50:1. thanks Aug 27, 2021 · What I did is remove the fuel pump from the ecu driver circuit, I am running the ECU wires to a small relay that pulls from the battery connector at the starter. Result speak for themselves, I did not take a pic of the ECU at 180 deg but it's a noticeable change. But even legends can stumble, and the Optimax 150 is no exception. SIA Electronics has many other repairs available. com Common Problems we can repair: Coils or injectors not working; Alarm stuck on; IAC not working; ECU not responding; Water damage; Fuel pump not working or staying on; Oil pump not working; Smartcraft not working; 2 Aug 1, 2014 · 1998 200 EFI Mercury OLD PROBLEM: motor stalled out at low RPM Since I've owned the boat in '06, the only issue I've had is debris stuck in the fuel pump, until now (emptied tank completely, replaced all fuel lines, installed inline fuel filter, replaced fuel pump & seemed to fix my stalling Jan 29, 2010 · "Absolutely, the DFI 2 strokes "Absolutely, the DFI 2 strokes are my "new" motor of choice. Auto Mechanic Jul 23, 2022 · But I have seen lots of people complaining about the outboard motor’s issues. The motor can show problems in the initial starting stage. To keep your boating adventures smooth sailing, let’s dive into the most common problems this engine faces and how to tame them: Mar 15, 2024 · We now repair every Mercury Marine ECU. Now it WILL NOT start. Still consider myself a "Marine Apprentice" after 47 years (learn something new every day). We have a new website up with more info and pricing. (800)737-0915 This is a repair & return for your Mercury Mariner ECM ECU PCM. Why is My Mercury Outboard Not Starting? If your Mercury outboard won’t start, there are several possible reasons. ) Disclaimer: These chars are for informational purposes only! For more information, please check the official service manuals. The ecu should just try to send voltage to the fuel pump as it always does. Mechanical fuel pump works fine, HP fuel May 14, 2011 · New to the forum. Mercury Mariner Engine Computer. (Applies to 4-stroke Mercury outboards with V6 and V8 engines. 2. Hoping for an easy and relatively cheap fix, I bought and installed a new alternator this past weekend. Always been cold blooded. The ECU switches power to everything though ground or negative. Was getting my 1999 Mercury efi up and running for use this spring. Fina I am out of ideas, and think I have the problem figured out, but could use some backup. Why is Your Mercury Outboard Beeping? If your Mercury outboard is beeping, it more than likely indicates a malfunction. Good battery. Several signs pointing Mar 8, 2022 · Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. Turn key, no beep and no HP fuel pump running. Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor Mar 20, 2011 · We can repair most problems in all Mercury outboard ECU's . Getting spark. The newest part number is 8M0108793 -click here- to see the newest superceded part Please note the new superceded part is a functional replacement and may look differant from the original part. I don't mind paying $1,500 for a new ECU, but would like to know what you think. If you put 12v to the pump/ VST independently the motor will run as normal. Look for corrosion on one or more pinslook different in colorburnt or darkened vs. ECM 555 Computer Re-Calibration & Monitoring (ECU) - 496 Mag and HO, 525 Non Supercharged Engines. No fuel pressure at fuel rail. Make sure the kill switch is in the “on” position. tudp fnxhp bylyow sojw qicf zpk ywdhr oobgt uglmjn luz