Mercury restrictor plate removal. ive got a bigger 4 blade on it .

Mercury restrictor plate removal. Oct 23, 2025 · Mercury Quicksilver OEM 12750A1 Restrictor Plate Assembly $17. Without buying a service manual, how do I determine if my motor has a restrictor plate and if it does where it is? Model - 1A30413EK Serial - 0R831484 EuropeanAM Mercury 3L/4 Stroke/Verado Aug 6, 2014 · Several shadetree mechanic friends have stated 2011 50 hp & 60 hp 4 stroke Yamaha OBs are virtually the same including ECUs. Jul 4, 2007 · Re: 9. 90 + $4. Is there a correct procedure for doing this? Any tips you can give me? Thank you. Buddy of mine did it on his Tracker Pro 170. Removing the air restrictor plate. Other Jan 6, 2003 · Re: 75HP Mariner (Belgian) Restrictor Plate Nick<br />I don't think that removing a restriction would hurt the engine, though you may need to retune it for best proformance. Mar 3, 2010 · I hear a lot of being able to increase hp. For shipping outside of the continental United States please inquire about shipping cost before This is a guide for the Mercury Four Stroke Outboard Engines Annual Service in a Step by step guide for hands-on DIY servicing of your boat engine. I have a 2014 75 merc 4 stroke. Speaking Particularly I've read online on a couple sites that a 2. It’s like pushing against a brick wall. Nov 5, 2018 · Has anybody removed the restrictor plate from an EFI engine for more horsepower. In doing some research, it seems to me the 40, 50 and 60hp 4 stroke mercs are all the same engine as the parts are all the same between the three, and to make the 40hp into a 60hp I need to remove the restrictor out of the intake, and replace the ECU with a Merc 60hp ECU. If you're a boating We would like to show you a description here but the site won’t allow us. (TW / 27 B / 9098467) (2) / LH Shipping cost is for the continental United States (lower 48 states) only. Talk with Debbie from Simon motorsport yesterday. I have a 2014 75 Mercury 4stroke efi. Supposedly, one can remove F-50 restrictor plate, kill electric power for 5 minutes, add water and you have a 60 hp Yamaha! Flashing ECU not required as it will "learn" the new airflow. Does the Opimax 90 have an air restrictor plate? I dont want to tear into it if I dont need to. The new ecm increase fuel amount for the added air. Mar 31, 2016 · I'm pretty much going to have my 2015 90hp Merc fourstroke flashed to the 115 (120 actually). 9 or 10 hp. View products 2007 Yamaha F50 Horsepower Increase - Remove Restrictor Plate - Convert to a 60HP - 2024 Update Captain Drew Cavanaugh 10. 9. Runs great. I don't believe that by removing the restrictor from my 75hp is going to turn it into a 115hp but the performance increase is very noticeable. So accord to the pictures i posted this engine has been running 30hp timing with a 25hp restrictor plate??? It's a 2009 Mercury 25hp Seapro 430cc Mercury-Mercruiser 8M0032134 RESTRICTOR PLATE genuine factory part not aftermarket. Obviously you would need to get a new prop to handle the extra Feb 20, 2005 · General Q & A - 496 HO manifold restrictor plate removal? - Originally Posted by mwdill 10 or 15 horse is about 1 or 1. In doing so May 4, 2016 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 5 Hp with a simple restrictor plate. They can answer questions for any Yamaha outboard model or horsepower. It fired up as normal and has performed incredibly ever since. Sorry guess i got Has anybody removed the air restrictor under the intake screen on a 75hp, 4 -stroke ? that's the part number deference than a 90hp, the 90hp don't have one. Regarding the restrictor plate, once the carburetor is removed, it is located directly behind it, sandwiched between the carburetor and the engine. I even emailed mercury to ask them about the restrictor plate and got a generic response about leaving things alone. Only the carbureted ones. Besides to get 40+ mph you have to trim up quite a bit on the motor and the boat gets very light on the water. A couple of questions? 1) Does my 15 hp. I looked Find Restrictor Plate- - 8M0032134 here. I was looking to get a little better performance from the 75 and I thought about sending the ECM off to Simon, but apparently the EPA shut him down, but while We would like to show you a description here but the site won’t allow us. I then investigated further, the slide is very long, it tops out so that it is impossible to open the throttle fully. The difference in power is caused by a restrictor plate within the air intake manifold. The time now is 04:49 PM. The year of the motor is 1999. May 8, 2011 · Re: 75 HP EFI 4 stroke upgrade You are thinking of the 40/50/60 Mercury 4 strokes. 5 mph depending on the hull Let Lori drive because it looks to me that they're going faster,I mean the boat is going faster. For more information regarding this item contact a dealer in your area. I looked Dec 19, 2008 · Re: Mercury 2. Will it? Tohatsu 40 HP ECM Flashing to Remove RPM Limiter After Restriction Plate Removal 40 HP model users often face RPM limiting and power restrictions after modifying intake components. Fast shipping - Click here to see live inventory status May 18, 2017 · 75hp Mercury 4stroke restrictor plate Motors and Props Jul 25, 2024 · Can anybody message me and tell me how to take the restrictor off of my mfs 40? Removing restrictor plate from Tohatsu outboard engine for improved performance Access a digital copy of your engine’s Operation, Maintenance & Installation Manual. Without ECM remapping, the engine may run inefficiently, risking overheating or damage. 9 to 15, you change restrictors, and change ECUs. Gangsters - Organized Crime - 1998 - ISO - BTW repack mercury restrictor plate removal Water separator · Mariner 2 stroke 9. However, since the 6 hp block is now obsolete, you should be able to use the 8 hp block. Most of these engines are restricted down to 2. After removing the restrictor plate and updating the ECM, power limits may persist due to throttle or fuel mapping settings within the ECM. I can not get it any closer together than 3 inches. If you remove plate, probably the engine will not work efficiently as the ECU and throttle are not being compensated to match more air intake. ive got a bigger 4 blade on it Remove restrictor and purchase the 60 hp ecm and your done. Anyhow, my real question is, are there any threads or detailed how to’s for the restrictor plate and ECU removal on the internet? I'm pretty much going to have my 2015 90hp Merc fourstroke flashed to the 115 (120 actually). 6K subscribers Subscribe We would like to show you a description here but the site won’t allow us. Mar 14, 2016 · Hello I'm new to the forum and ran across an old topic and would like some more info on. May 2, 2012 · I?m getting ready to buy a new Mercury OptiMax is the difference between the 75hp and the 90hp just the size of the restrictor plate in the intake track? And what size HP do you get if you remove the plate altogether? May 10, 2020 · All you need is the 20hp ECU ($600) & remove restrictor plate. 00 - was looking for a good motor to run on a canoe. We would like to show you a description here but the site won’t allow us. Jun 22, 2016 · Does anyone have any tips? How about a pic of the piece I'm looking to removedo you have to get the rubber gasket off the throttle body or leave it on? Is the restrictor inside the rubber gasket/cone? Dec 18, 2015 · I see, I'm going to remove mine next week and get it sent in. Apr 17, 2010 · If this will work for my motor I can hold off and save up for a 75hp to max out the motor size for my boat and then remove the restrictor plate and get around 90hp out of it. I’m wondering if this is still the case or if it’s a true 120 now. by removing the restrictor plate from a 50 to make it into a 60 hp. Dec 1, 2018 · If you remove the restrictor on the 9. Has anyone had any experience with this? I May 31, 2018 · Getting my 2017 Mercury EFI 30hp flashed to a 45hp. But there isnt a restrictor plate. 9, it will run horribly lean. I just spent $1,500 on a tune-up, and now it starts but after a minute or two, it seems to shutter and then stall, which appears to happen when it gets gas. According to experts, these devices reduce the water flow from your showerhead to 2. Page 2 of 5 < 1 2 3 4 > Last » Show 40 post (s) from this thread on one page Jun 15, 2005 · If the only difference is in the paintwork and a restrictor plate in the lower powered motor, surely it is a racket to charge more for the higher powered engine. At least. 9 Suzukis have noticeable power increases even without replacing the ECU. Superseded OEMs: 8M0006918 Jul 23, 2015 · Rumor has it that if the restrictor plate is removed your model will become an F50. Thanks, chris Jun 28, 2017 · Ive recently purchased the 75 Hp mercury 1. The Sidewinder 15S motor is off probation on August 15, 2010 Jun 3, 2012 · It took less than ten minutes to remove the restrictor plate and install the wide open carb gasket into my engine. To convert to 20, you remove any restrictor, and change the ECU ($900 in parts plus labor). 5 HP. Ecm is about $600-700. I could plane out between 40-45 on that boat. 2hp Mercury (1980s models) is basically a restricted 3. Simon Technology said I would need to remove the restrictor plate when I get the ECU back from them. Mercury recommends that boaters remove their lower unit every 3 years or 300 hours as part of regular maintenance, largely to address any corrosion or other All times are GMT -5. thehulltruth. Oct 16, 2024 · Has anyone here removed the EFI/Air Filter restrictor plate from their 75 HP Mercury? I’m trying to find a parts diagram so I can see which part to remove and get an idea of how easy it is, but I can’t find much online. . Apr 21, 2020 · Boat is a 2014 Suntracker with a 2013 Mercury 40 hp 4 stroke EFI Bigfoot. Hop to:Contact Us | RETURN to ContinuousWave Top Page Oct 9, 2015 · In this thread we have a second-hand account that someone else performed the upgrade, no evidence that there was an improvement in horsepower, and another second-hand account of removal of a restrictor plate. To convert from 9. If you have a flow restrictor in your showerhead, then you are using less water for your bathtimes. I am planning on having Simon motorsports do a ECU upgrade /Flash. 73l motor and have ended up reading your thread, From what i found with Parts diagrams there is a 75/80/90 and 100 hp versions of this motor that were basically the same, minus the restrictor plate in the lower models. New comments cannot be posted and votes cannot be cast. engine. Fact or fiction ? Any advice or warnings before I try removing restrictor plate ? ps I called Simon Motorsports and they said they can do it but I need to remove the restrictor plate. Lund Marine users report power limits despite restrictor plate removal and ECM updates. com/boating-forum/720444-2015-mercury-four-stroke-90-hp-ecm-question. General Q & A - 496 HO manifold restrictor plate removal? - Originally Posted by causin trouble Heres what i did with mine Have you ran the boat yet without them? Any difference in performance or sound? Jan 12, 2016 · I bought an aluminum restrictor plate from WCCC a couple of weeks ago for my 351c. 67K subscribers Subscribed May 18, 2017 · 75hp Mercury 4stroke restrictor plate Motors and Props Buy MERCURY OEM RESTRICTOR PLATE * { 75/80EU [1B521878] & BELOW}* - 8M0006918 FREE Shipping on qualified orders - Boats. The Restrictor plate was designed to be Air restrictive to limit suction noise of the engine, Since these engines were very loud to begin with. Anyhow, my real question is, are there any threads or detailed how to’s for the restrictor plate and ECU removal on the internet? Dec 27, 2019 · I removed the lower unit of my 1962 9. html) DSwatloski 12-04-2015 04:20 PM Nov 25, 2024 · Anyone have any insight on removing the restrictor plate off a 40? Tohatsu Outboards Owners Group discussion on removing restrictor plate from 40hp engine, owners share their experiences and results Jul 28, 2025 · I am selling a Mercury Quicksilver plate restrictor, part # 8M0032134. thanks. This video shows the location of the restrictor plate. Customer: I have a 30 hp Merc motor that was recently modified by removing the restrictor to enhance its performance to 40 hp. The unique 351C thermostat "hat" A Look into the Secret World of Restrictor Plates Petty Brothers Racing 6. Oct 27, 2019 · i have a 2006 Optimax 90 on a Crestliner 17' Fishhawk. Speaking Particularly about a Yamaha F 50 take the plate out and supposedly it’s a F 60. I bought this outboard brand new in 2009 and i have never messed with anything onther then slightly enlarging the highspeed jet. In my case I need a new prop the 9. I was told i could remove it and get more power but I don't want to cause any engine problems. So i tryed it on a short run i picked up 8mph and about 500rpm. 39 shipping Just a quick video on how to disconnect the rev limiter on 40/50/55/60hp mercury’s MERCURY 8M0032134 Restrictor Plate Schematic Object Key : 10 Product Description : MERCURY 8M0032134 Restrictor Plate Product Category : 75 EFI (4-STROKE)/ 1B366823 THRU 2B094995/ Integrated Air Fuel Module Disclaimer: Each item listed in the table below is available for individual purchase and is not sold as part of a package or set. Is this something doable or is this just a crapshoot. More power? Not sure but think it is a restrictor because it covers about 1/4 to 1/3 of the throat and is directional (has arrow to point fwd) I have thought about using my 18 pitch prop which would help the rpms get to limit. She told me that it would be a three to five day turn around. 9 View Full Version : Mercury Mariner Outboard Forum . Between the new ecm, SS prop and raised the engine up one hole he picked up 5-7 mph depending on load. Mercury have a restrictor plate that I can remove to make it a stronger motor? 2) And if so where is it and how do do remove it?? Advanced Thanks for all your responses. Jan 12, 2021 · Has anyone ever heard of this, if you own a 40hp 4 stroke Merc, with the simple purchase of a 60hp ECU, and removal of the intake restrictor, your motor magically turns into an 60hp? Mar 17, 2016 · ? On 75hp Mercury 4stroke I have a 2014 75 Mercury 4stroke efi. Nov 6, 2018 · Has anybody removed the restrictor plate from an EFI engine for more horsepower. Apr 8, 2021 · Has anyone pulled the restrictor plate off their Mercury 75hp outboard? If so, did you notice any difference? Buy MERCURY OEM RESTRICTOR PLATE * { (RESTRICTED 40)}* - 422501 FREE Shipping on qualified orders - Boats. May 3, 2023 · I installed a 75 HP 4 stroke Mercury to replace my 50 HP two stroke several years ago and overall I have been very happy with the change. 3 hp! So how about if it was made by yamaha - is removing the restrictor plate still good? Who made the better motor - How do you tell who made motor? how much does the little motor weigh? Do they have a reputation as good motors - i know where one is - suppose to be like new for $300. Some remove the existing intake system completely and install an air pipe that goes directly from outside the cowling to the air inlet of the carburetor. Aug 3, 2013 · Removing a restrictor from a Merc motor is less of a modification than performance exhaust on a motorcycle/snowmobile. I understand that on the 75 optimax, one has to remove the air restrictor plate which seems to be a hassle. I have been told the 25hp is exactly the same as the 30hp and all you need to do is replace a restrictive gasket that is We would like to show you a description here but the site won’t allow us. I need a inner dimension of this restrictor plate. It's important to note that Mercury specifies a different block for the 6 and 8 hp engines. Removing the restrictor plate increases airflow and fuel demand, potentially causing a lean condition. I’ve got this Mercury 50 efi and I recently found out it shares the entire engine with the 1L 40 and 1L 60 efi, (including the racing 60) but the key difference is the tune and a restrictor plate in the intake, you can easily remove it but I’ve heard it doesn’t make a difference so I haven’t tried It yet. The plate can be easily taken out. Sep 2, 2010 · Re: Carb restrictor plate removal. 9HP 1999 loses power · restrictor plate, 2005 50hp Feb 5, 2021 · Did you end up changing out the ECU and restrictor plate? I have a boat on order that should be here in a month or so with a new mercury 50hp efi I would like to try this on. People who have removed the restrictor plate on their 9. Removing the restriction plate on a 40 HP Tohatsu increases airflow but triggers the ECM’s RPM limiter to prevent engine damage. Check for any active engine protection modes or rev limiters programmed in the ECM software. 8 hp Mercury outboard in order to replace the water pump impeller and now I can not get the lower unit re-installed. I've been told I could take the restrictor plate out and give it bit more hp. Jun 29, 2012 · Just bought the new bypass restrictor from wccc to use the windsor style thermostat at 160 degrees. Got more power and top speed out of my suzuki 9. 9hp efi be converted or altered to be a 15hp ? If so what has to be done to it ? I can't seem find anything on the internet for the 9. Simply remove it for full power. 9 came with a 9 pitch probably need a 10 or 11 pitch now to get the rpm's down within operating range. 2 HP conversion to 3. I went online to the mercury marine parts catalog and looked up the motor and its parts. it's easy to do, no tools needed, easy to Jul 27, 2008 · Hi - I have a Quicksilver 380HD and a Mariner Marathon 25hp (1 year old). The engines are pretty much identical in size and such. 3hp. I tried to remove the factory brass ring last night and couldn't get it to budge with a prybar and hammer. The only way to get full throttle is to cut the top off the slide! Am considering this! Stu Mercury OEM part: Mercury Plate Restrictor - 8M0032134 Looking for another part? Try the Mercury OEM Parts Portal. In this video, I take you through the process of upgrading my 2022 Tohatsu 15hp MFS15E outboard motor to a powerful 20hp using the MFS20E ECU and restrictor plate removal. There are 5 parts with an index at the start of Sep 14, 2024 · I have heard you can upgrade the 75 horsepower motor to a 90 with just an ECM change and removing a restrictor plate in the intake. The HP will double. If that is the only diference you can find, then I would remove it!<br />Richard - - 2015 Mercury Four Stroke 90 HP ECM Question (https://www. The boat is rated for 88 HP. net I'm pretty much going to have my 2015 90hp Merc fourstroke flashed to the 115 (120 actually). Sep 17, 2015 · Well warranty issues scared me to put it back in, lol. 5 gallons per minute. net Jul 9, 2015 · Re: Removing 50 hp restrictor plate makes a 60 hp? by fortunare » Mon Aug 31, 2015 3:52 am which brands of outboard would removing the restrictor plate apply to? I have a 2005 Suzuki. Aug 5, 2012 · In some 9. Seems too simple Mar 5, 2017 · Now the urban myth is that you can "remove a restrictor plate" and then the engine puts out 3. This is new in the package and comes as shown. Dec 31, 2018 · I have read past posts that the 115 tune usually performed a tad shy of a normal 115. I love what it did but scared it will cause engine damage. On the Mercury any fuel line may be used from the gas fitting to the carb. They have a restrictor (#23) in the intake manifold along with the ECM can be modified. Offering discount prices on OEM Mercury Marine parts for over 50 years. The 115 motor has a different set of camshafts, presumably larger lift to allow more Nov 6, 2018 · I recently purchased a DF15 efi Merc and it has a restricter and the 10hp has a smaller restriction, can anyone tell me if removing the restrictor will cause any harm? Any Yamaha guys remove their restrictor plates? I've got a f50 and was wondering if it was safe to remove the restrictor plate to go to a 60hp if it will run to lean or rich thanks Archived post. I had a 75 HP four stroke on my 2014 tracker 175txw and yes the restrictor plate removal did give me an increase. Mar 28, 2023 · Can a 2022 Mercury 9. On the Mercury any piston ring may be used as long as the piston is not altered. It shows that the only model using the restrictor (if I'm looking at the right thing) is the 75HP model. Will it? Sep 21, 2022 · OK who has pulled the restrictor plate out of their MFS40 and has some real life feedback on performance increase/fuel burn figures and longevity? It is allowable to countersink and use flat head screws in the reed block for ease of changing the restrictor plate on the Mercury. It has been an accepted fact for decades now that the 351C bypass system was not the greatest idea Ford ever came up with. Now how do you remove the old plate without damaging anything important? Thanks again guys! Feb 12, 2011 · WOT. 9 efi's. They are reporting an additional 30 or more HP. To avoid issues, monitor air-fuel ratios and consider professional ECM tuning to adjust fuel delivery. Last year. Although this is a great idea, the restrictor can become a shower time nightmare, particularly in areas with low water New water restrictor plate for the Mercury or Ford equipped with the 351 Cleveland engine. 8 Mercury 110 - Exhaust Plate removal Nothing is loose under the covers, some can be removed without removing the engine but in most cases it's easier to track down the problem, a step at a time removing the powerhead to ck the w/tube grommet, then the exhaust covers and then the water jacket cover if is nessicary Welcome back as always,Today we are taking a deep dive into the items necessary in order to complete a successful 40/50 HP to 60 HP conversion on a #mercurym Oct 9, 2015 · A restriction plate serves the same purpose as a smaller carb, by allowing in a smaller volume of predetermined air, so by removal of the restrictor plate (if so equipped) one would need to increase the level of fuel delivery to prevent a lean condition and possible powerhead damage and this is accomplished by increasing the jet size, if this is the way a particular manufacturer designed the Aug 19, 2013 · Re: Tale or truth Tohatsu 40hp bump to a 50hp Restrictor plates, restricts HP full punch, works along ECU and throttle body as stated by Paul, being a certified Tohatsu tecnician knows his TLDI horses well. The 15 also uses a (different) restrictor (3RT035360M) from the 9. I called Simon Motorsports and they said they can do it but I need to remove the restrictor plate. I have read past posts that the 115 tune usually performed a tad shy of a normal 115. Oil Alarm HELP · Mercury 75 hp 4 stroke (2011) guardian alarm and now runs rough, ideas? . 9 models are instaled carbs from 15hp but under carb is a restrictor plate to reduce power to 9. The 6 hp engine includes a restrictor plate, while the 8 hp does not, so you can simply remove it. gv0 6kv3z 8c2i yivg 5ah cpf0t fr7u gevkg3 bhqes5q ovmb4s