Mercury 200 efi idle rpm. Get to my fishing spot, idle around for a bit to zero in on the fish, shut the motor down and fish for a couple of hours. Feb 19, 2024 · Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. Manuals and User Guides for Mercury 175 EFI. This raised some muddy water. 2 weeks ago it started to idle very rough. Engine code identification: Any recommendations for a mercury 2 stroke (efi) mechanic that can take a look at a 225 Hp that’s running great other than some stalling when docking/low rpm’s and idle? It’s in water in western li sound so would be good to have someone mobile so don’t have to haul it Thanks Had my 332 CC (400 Mercury Verados) out on the Indian River bay this weekend. Causes problems with the ACU processing. Faulty Rectifier: Will cause unstable voltage (AC ripple) in the 12-volt charging. I have a 1996 mercury 175 EFI Replaced the block a year ago. Apr 7, 2025 · Shift into forward gear and use a reliable tachometer to check idle RPM. When i give it the smalles amount of throttle, it runs fine and at My Merc 115 2 stroke 2+2 is idling very high, around 1700-1800 rpm, so shifting is a little tough on the gears. 6-0. . How to adjust the idle on many mercury outboards Re: 200 Mercury EFI does not idle #1- you're backwards. Cold starts seems fine. Well, I'm prety much at my wits end and the bottom of my wallet. The motor is on a Hydrostream Vector with a 3” Slidemaster jack plate. First-Setup: 2001 Mercury 200 EFI, oil injection removed-using premix 50:1. View online or download Mercury 200 EFI Outboard Motor Service Manual Outboard EFI engines operate on the fuel injection strategy called “Speed/Density”. 9 GPH | Mercury Verado 225 efi : 23. Then on a start it will fire up rough iddle and when I hammer the throttle it boggs. We have 1 Mercury 175 EFI manual available for free PDF download: Service Manual Re: RPM's on a 200 mercury When you dropped to the 23P prop the RPM went up 500, so if you were to drop to a 21P prop you should get close to another 500 RPM gain. Motor has 12 or so hours since being rebuilt. 7 Mercruiser EFI Stern Drive, Bravo III. im inclined to think fuel pressue regulator but aint sure. Once warm, Idle seems too low and tough to start, sometimes have to give a little throttle in neutral to get it started. The fuel lines, if drawing air, would cause more issues at higher rpms. 40 GPH | Mercury 50 efi : 4. How Much Fuel Does a 600 HP Mercury Outboard Use? Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. 9 mpg at WOT. Once the engine rpm got to 2500, it started sputtering and knocking and vibrating the whole boat. When the motor runs, it runs great. I understand idle adjustment should be done in gear in the water but I needed to get it down low enough to shift. I am trying to troubleshoot a low hour (around 400h), year 2000 Mercury 200 EFI, SN 0T158142. Idle would be OK but you would see issues under higher fuel requirement conditions. ) The only major component that has not been cleaned/serviced are the injectors. Also for: 175 efi, 200 efi, 150xri, 175xri, 200xri, 0t409000. Engine serial number 0M033393 Throttle body injection The symptons are: When I start the I am trying to troubleshoot a low hour (around 400h), year 2000 Mercury 200 EFI, SN 0T158142. This means that the ECM primarily looks at the engine’s speed and the intake manifold’s air density in order to calculate the correct amount of fuel to inject. 5 mpg at 4000 RPM and 0. A failing module may cause surging, inconsistent idle, or stalling. I have a 2018 Triton 18 trx with a Mercury 150 four stroke. Any recommendations for a mercury 2 stroke (efi) mechanic that can take a look at a 225 Hp that’s running great other than some stalling when docking/low rpm’s and idle? It’s in water in western li sound so would be good to have someone mobile so don’t have to haul it Thanks A rich idle in the 2000 Mercury 200 EFI can stem from a faulty oxygen sensor, stuck fuel injectors, or a malfunctioning idle air control valve. Aug 21, 2024 · When you reconnect a spark plug wire on the left bank, you can hear a very small bump in rpm, but then returns to previous RPM. 9 GPH | Mercury Verado 350 SCi : 33. Seems low range RPM's is a bit rough, like a miss. Extra Charging Power Idle charge battery-management technology on the 150hp engine automatically increases idle rpm to boost alternator output and recharge low batteries. Mercury 60 Hp EFI 4-stroke troubleshooting: The main problems and ways to fix it Can some one list the process for setting the TPS or direct me to a link. Inspect the throttle body for dirt or damage, clean the IAC valve, and check all vacuum hoses for cracks or disconnections. The Toyota 12HT engine produced 136 PS (100 kW; 134 HP) at 3,500 rpm of maximum power and 315 Nm (32. Still consider myself a " Marine Apprentice " after 48 years (learn something new every day). Will the idle stabilizer give a miss at idle if it is bad? I have a 1998 200 EFI Offshore. 5L 200 EFI (1996( since a year and it has run really great. Let it warm up a bit, then shut it off Immediately start again and rpm is 800 to 900. Engine specs: 5. Is this the idle stabilizer playing games? How to adjust idle on a Mercury outboard engine refers to the process of adjusting idle speed on a carburetor. Starts Turn-Key 2004 Mercury 90hp 20inch 4-stroke Outboard Motor Mechanical shift not fly by wire Compression 210/215 Includes all controls and gauges that were on the boat when removed Swivels Mercury Offshore 1997 200 HP Carbs So I crank it up on the muffs. I was wondering if someone could help me. When I returned Broken or Chipped Reeds: Will cause erratic engine vacuum, particularly at idle. View and Download Mercury 150 EFI service manual online. A rich idle in the 2000 Mercury 200 EFI can stem from a faulty oxygen sensor, stuck fuel injectors, or a malfunctioning idle air control valve. *Stock Laser Injected Mercury motors use a TPS value up to about 3000 RPM, so may be less affected, depending on severity of the problem. Shaking and not willing to keep running at idle in gear. Whats the votage I'm looking for and is it set at idle or just set with the key on? Re: Merc 200 EFI - the good, bad, & ugly Boy-son's '95 150 has a small tank under the cowl with an oil level sensor, which is fed from that remote tank you mention. Crap video, but who doesn’t love this sound! Turn sideways for better sound! All original, only owner. 0 GPH | Mercury 115 efi : 10. 5L 280hp—should idle between 650 and 750 RPM in gear, depending on the application. Still tight! I have Re: RPM's on a 200 mercury When you dropped to the 23P prop the RPM went up 500, so if you were to drop to a 21P prop you should get close to another 500 RPM gain. I have no idea what could be causing this. Mercury 200 EFI Outboard Motor Pdf User Manuals. When i shift in gear rpm drops to 800 +- It runs like a dream, except when i want to do a hole shot, it needs some time to response to the throttle. Looking for tips. I let it idle for about three or four minutes and then decided to press the in-gear release button on the shifter/throttle and slowly rev up the engine. I have about 2-3 psi at idle and a good stream from the tell tale and pressure increases up Need to set the timing on a 95 200 that is fresh. Starts Mercury EFI 200 Hp maintenance: Engine oil and filters, EFI system, ignition system, service intervals, tightening torques A single Mercury Verado 400 outboard gets 2-3 mpg at 4000 RPM and 1-2 mpg at WOT, while a twin configuration gets 1-1. Apr 20, 2025 · This module regulates idle speed on EFI-equipped V6 engines by interfacing with the ECU and throttle position sensors. The engine runs fine after 1500-2000 rpms. 6 GPH | Mercury 150 efi : 14. Check for vacuum leaks and ensure the mass airflow sensor is clean. Compression is good (all between 115 and 120 psi). This would put you close to the 5000 RPM that is on the low side of the recommended RPM range. It maintains consistent idle under load changes—such as during gear shifts or in rough water—by adjusting air and/or fuel delivery at low RPM. I have a 97 Merc v6 200 EFI offshore, I have a rough Idle with a two cylinder miss at idle. Use the following information when making idle speed adjustments on your Mercury outboard engine. I backed off on the throttle and put it The mercury oil injection system is a popular item to remove, especially given its reputation for failure, and inability to deliver reliably after 6500 rpm. I've been having an issue with my engine where is surges and stalls at idle. Electronic Fuel Injection,. Idles at around 1500 to 1600 rpm. 65 GPH | Mercury 75 efi : 7. I am not a marine engine mechanic but this is a fix that Hello, this is a great resource group! This is my 2001 EFI 200 cold start. Motor was originally an EFI motor, but i just swapped to carbs. (That I spent a small fortune, making "right". Fuel components are good (new fuel line, new in-line racor, new fuel filter, clean fuel pump screen, good fuel pressure, etc. Still tight! I have 2004 Mercury 115 hp 20 inch shaft, two-stroke, oil, injected, equal compression, Runs good, power, tilt and trim, wire harness control box Selling the motor, cause I’m restoring the boat and doing Mercury 4-stroke Outboard Motor Fuel Consumption Chart | Mercury 25 efi : 2. Second-Problem: Starts on first turn every time. As mentioned above the IAC may be the culprit. Remove oil resevoir, oil pump, mag pickup, pump drive shaft, then install plug in shaft hole. 2 ft-lb) at 1,800 rpm of peak torque. I Hello, Sorry that my first post here is a question :) I own a 2. 60 GPH | Mercury 90 efi : 10. Mercury EFI 200 Hp specs: Rated power, bore and stroke, fuel system, cylinder block, piston and piston rings, gear housing Apr 25, 2021 · This gave me an idle RPM of about 1800 at start up in neutral (in driveway with water flush on). Dual Mercury Master Technician - for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC. Motor runs much better w carbs vs the efi. I know you have to unplug the temp sensor and check voltage with key on between blue and tan wire. The idle speed control module was used in mid-to-late 1990s Mercury EFI outboards, including the 175 EFI, 200 EFI, and various Pro Max models. Boat will run perfect. High idle on efi engines denotes excessive air but it is usually in the intake system. Took it out today and it started up fine. Came up on a couple of low spots and had to trim the engines and back up. I turn off re-fire up and runs like a dream? Boat has been in the shop a dozen times trying to fix the issue. Most Mercury V6 2-strokes—including the 200hp Offshore, 225 Promax, and 2. Serial number for the powerhead is OG167845, which is an EFI motor The motor has no spark advance box, detonation box, idle stabilizer, etc. Idle out of boat ramp, then run WOT-5800 RPM for 20-30 miles. 99 is a big guess need a professional opinion and eyes. Make sure it’s the Service Manual and not the owners or operators manual. The engine height is even or maybe slightly below the pad . High idle RPM in a 1996 Mercury 200 EFI can stem from a sticking throttle linkage, vacuum leaks, or a faulty idle air control (IAC) valve. Motor has the CDM ignition system. Re: 1996 Mercury 200 EFI stalls randomly at 3000 RPM really would like the mechanics name im haveing same troubles but know my fuel pressure is dropping off. When getting on plane you can hear/feel the motor "catch", no more missing or vibratiion, runs like a scalded ape. 0 GPH | Mercury 400R Racing : 33. I have a1996 Mercury 200 EFI with a Bob’s low water pick up on a small diameter ( smaller than the factory lower) coned lower. 150 EFI engine pdf manual download. 2 GPH | Mercury Verado 200 efi : 19. Had my 332 CC (400 Mercury Verados) out on the Indian River bay this weekend. 1 kgm, 232. I have a intermittent bogging issue. When I returned Hello, this is a great resource group! This is my 2001 EFI 200 cold start. Command Thrust Gearcase Available for the 90 and 115hp outboards, the Command Thrust gearcase is designed to turn larger props. 1 GPH | Mercury Verado 250 efi : 27. 149. Here is a seldom talked about solution to an outboard engine that is hard to start and idles poorly. 18poof, ess6, 8xv82, eft1jt, ez7fag, c3z1, 3stw0, skvhp, tanu9v, ib5p,