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 #mercurymarine and going over their respective locations. This conversion can be done successfully on both engines AS LONG as they are 4 cylinder 995cc engines. This mod cannot be done to the smaller 3 cylinder 40 HP engines.
Items required to complete a successful 60 HP conversion free of issues:
– 60 HP PCM new or used (used is preferred as it does not require intial PCM setup at a Mercury authorized dealer and is generally found much cheaper
– Restrictor ring removal
– Propeller change out of the OE Blackmax
Propeller pitch size will vary based upon what is required for your particular load and I HIGHLY recommend a stainless steel preferably of the Mercury brand in order to stay compliant within the specified RPM range of 5500-6000 RPM. I currently run 6100-6200 with my 4 blade Trophy Sport 10.625 x 14 pitch with zero issues, and no Guardian intervention, so you will be safe to be slightly higher. Bear in mind, a jackplated setup will increase RPM by about 100 – 150 RPM of whatever the propeller would spin nominally at WOT otherwise.
The 995cc #mercury powerhead is based off the 70 HP #yamaha powerhead and the F70 is specified to make its horsepower at 5800 RPM as per the Yamaha website, so I STRONGLY recommend you stay on the hot side over the lower side of the RPM powerband. Do not be afraid of high RPM. It is required to make power and to keep from lugging your lower gearbox and decreasing its overall service life.
For help sizing your prop, I would be happy to help if you do not know what to do, feel free to drop me a comment and we’ll go from there.
I will need your CURRENT:
– Max RPM at wide open throttle
– Max speed at wide open throttle
– Current prop pitch
IMPORTANT SIDENOTE: The 40 HP 4 cylinder version model Mercury outboards come equipped standard with a 2.33:1 Command Thrust PCM. I did not realize this at the time of making this video so the requirements for your engine change. In order to successfully complete this conversion, you will need to obtain a 60 HP Command Thrusts/ Bigfoot variant PCM. Propeller pitch will also vary from what is shown in this video!
Extras:
I did not discuss this in the video, and it is optional, but for those running Champion copper spark plugs, I recommend NGK part number: BPR6EIX/ 6637 spark plugs for longest service life/ hottest spark/ easier ignitability for coils.
Resources:
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Lets get you out there!
If you enjoyed this video and the information on it, please subscribe as there will be more rolling out soon.
Follow my IG: extremeboating for more information on mods, and more frequent posting.
For all subscribers and viewers alike: This video has received a TREMENDOUS amount of views. Wow! Thank you everyone for taking the time to view this video!
I have sold the Bass Tracker Classic XL that I originally had the 60 HP mod on. That being said, I have my 60 HP mod for sale! The mod is being sold as a kit. The 60HP PCM, a custom 15 pitch Mercury Vengeance propeller with PVS holes built into it (4200-4400 RPM holeshot) and additional cupping built into it in excellent condition, and the custom made 60 HP cowl cover you see in this video.
If you are interested, reply to this comment and leave me your email so we can communicate, or leave me your IG username and I'll contact you.
– Rob
I have a 2007 40hp that I'm changing into a 60hp. When I took the boot off there was no restrictor plug in the air intake. Any thoughts as to why?
Hi
looking for upgrade of 50hp 2007
have ecm 0704 installed. but for the 60hp i can only find ecm 0401 available. anyone know if that will work?
I have a 2020 40 HP 4 cylinder Bigfoot. Do you know the correct partnumber of the 60 HP PCM? I think theres just 2 to choose 8M0168149 and 8M0168139 (which got an SP mark, so i think its for Seapro)
I have a 2009 40 3 cylinder, would I be able to convert to a 60?
Great video mate! Would this still work on a 2022 3 cylinder mercury 40hp?
If yes would the ecm need to be of the same year ?
Thanks
Ive read on a few tracker forums that you can simply remove the restrictor plate and prop it without changing the ECM. Any feedback from people who have done this successfully? Wanting to do this on 2017 merc 50 running on a 2017 tracker Pro 170.
I have a 2015 40hp I’d like to know which pcm I need todo this be big savor on my duck boat
Great video here, very concise and detailed.
Im reminded of the days of the Yamaha 150-200 2 strokes, where we just changed a few things like the carb jetting and timing curve, along with different reeds. We also could shave the heads a bit to up the compression but that was usually too much cost and effort for the 4-6 hp difference it made.
On the newer Mercs, I did wonder if the cams are different for the 40/50 to the 60, that would be something a competent marine mechanic could do if it was worth the cost and effort, Happy Holidays!!
Hey man I got a 05 tracker with a 60 efi with champion ra8hc plugs. Should I be okay running the ngk plugs u specify? I saw that the cross to ngk online is DCPR7E – NGK Spark Plug, 3932. How did you find that thT plug is okay ?
I just did this to mine and it cranks but does not start.
where did you get that motor cover ? Thats sweet
Thanks for posting this. My classic xl has the 50hp on it. I found a bargain ecu from a 60hp, that was being parted out because of damage, and removed the bushing, and changed prop. Better performance all around.
Great video, thank you. I have a 2022 60hp Merc on a 18' bennington 188sv pontoon and my max speed is 17mph making it very difficult to get to my favorite fishing holes. I desperately need to go faster but the sticker on my boat says 60hp max. It appears your engine was a smaller than 60hp but you bought a 60hp computer chip. Will this work for me since I already have a 60hp? What prop would you recommend and how much difference would just a prop make (in mph) if I just changed the prop? Thanks again.
Do you know if the 2.0L 80hp can be converted to 115hp by swapping the ecm? It is by my understanding the same engine. It is a 2022 model fyi
Where did u get the cowl cover
Is there no way to tune it on stock Ecu? Id love to spend less or no money on my engine I hate when they limit you from what it’s capable of
Can i follow these same steps for a 3 cylinder 40/60 conversion?
I saw others mention changing out the carburator as well
Do you know what ecm model number I would need for a 2010 efi 50?
Hey. I have Mercury 50 efi four stroke 2006 year. Can I remove this plastic tube? I want to send a computer to increase the power up to 70 hp and also I want to change the prop. What do you think? Greetings
Do you know if there actually is a restrictor ring in the 60hp efi? Is it not only in the 40 and 50 hp.
This is awesome!!! How do I get more info into this. I have a 2020 75 and was wanting to make it a 90 if possible. I just have no idea how to get started or where to research anything about it.
Did you say that a factory new ECU would require setup at the dealer? Or is it a bolt in Part? Thanks
Thanks for the video. Do you know if 60 hp has a intake restrictor motor is lazy out of the hole.
Can you do this to a 2015
I just paid $170 to Mercury to extend my warrantee for the electronics for two more years. I'll have to wait another two years before upgrading my 2021 50 hp to a 60.
Hi mate Gibo Brisbane Australia watching yr flushing vid this arvo was great just put a new 60 merc on my Quintrex hornet so no info from dealer apart from bookI'm not nieve but the book only showed a drawing for flush at teltail I use muffs but spent a lot on motor do I run engine when flushing at the teltail after using muffs I presume thermostat would still be open anyway great stuff u do
Great video makes me wonder if I could do the same conversion with a 2018 75hp mercury to 115 hp would love to hear your thoughts?
Where did you pick up that cowl cover?
I have a 2003 Bass tracker 175 PT putting a 22 model Mercury 50 do you know what three-bladed prop I would need. I was sold a 10.5 * 13 have not tried it yet
Can you remove the air restrictor ring without upgrading the PCM?
I have a 2015 60 hp mercury. So what computer is it that I would need
Hi, Do you have a 2013 or newer ECM for a Mercury 60hp CT or Bigfoot available? If yes, how much are you asking? TY Chris
So I can do this the 40hp on my 21' classic xl?
Thanks for the info..
hola de nuevo, me podrías pasar un enlace de toturial de como hacer para poder desmontar la centralita, gracias
HOLA HE COMPRADO LA CENTRALITA PARA CONVERTIR EL MOTOR A 60 CV, PERO UNA PREGUNTA ME PODRIAS DECIR COMO PUEDO QUITAR EL CONSTRICTOR DEL AIRE, GRACIAS
Will this work for a 2004 40hp 3cyl 4stroke?
Has anyone used Megasquirt on these engines?
Hi is it possible to make this kind of conversion with a 2004 3cyl fourstroke efi 30hp to 40hp?
I already have a 60 Mercury will it also have a restrictor plate in it?
I have a 2019 75hp merc. So specs for the 75/90/115 are identical motors. So if i get a different (115) ecm and remove restrictor ring and re prop im good ?. Parts catalog show a few didn't ecms for the 115. Does it matter which. Thanks for any help.
Had a question hopefully you can answer. I have a 40 HP 2020 Merc. 4 stroke CT, I watched ur video on conversion to 60 Hp. I picked up used ECM from 2010, 60hp 4 stroke non CT. Should that work on my application. I'm now turning bout 5500 rpm @ bout 20 mph( full throttle)on back of 16' pontoon boat ? Like to get another 5+ mph?? Prop. Is huge cause is a CT thruster lower unit stock prop. 854342A33 14x10p. Any help can render is greatly appreciated. Ur videos R GREAT! Tyty
Where can I find that engine cover?
Those ECM’s are not cheap..
What propeller in stainless steel 4 blade you use. And my other question is the jack plate that you install between the motor and the transom help?
Great video bro! Exactly what I've been looking for a while now ☺️ My outboard is an Mercury 100 HP EFI 2010 model. If I get this right, the 75 HP EFI all the way up to 115 HP EFI is the exact same engine; except models LOWER than 115 HP has an restrictor air inlet ring, different ECU programming and smaller prop?? I see that Mercury sell 4 different ECU's for the 115 HP EFI engine, so what is the difference and how do I know which one to purchase? Part number: 8M0083206, 8M0083210, 8M0083207 and 8M0083213. Since my model is 2010, is it posible to softflash the ECU through a special adapter cable => USB?
Thanks a lot in advance and best regards,
Eirik Larsson
Norway