FIXED my rough Idle + stall problem 60HP EFI Mercury Outboard 2005 Four stroke engine!

[@edyoung4068]

Thanks so much for posting this video. My 2011 50hp 4-stroke Mercury would idle smooth, then spit and sputter and die. It would start back when I hit the starter, maybe idle smooth for one minute or maybe five mins then act like it was running out of gas and die. It ran great at any speed above a fast idle. Thanks to your video I located my “Idle Air Control Solenoid “ as you described, replaced it and it solved my problem. My local marine repair shop foreman said I needed an engine control computer for $499, plus 5 hours shop time to replace it at $110 per hour. I owe you a cold beverage of your choice.

[@vince2850]

Hi Ed! :) I am glad my video was able to help you out! Thanks for the drink offer, I am a rhum guy lol! :) hopefully this winter is short and we can get back on the water asap!

[@glenmiller3768]

Hey Vince, have the same problem with mine, found it the hard way like yourself. Good on ya mate

[@vince2850]

You are welcome! Glad I could help! :)

[@lcsmith1002]

Awesome helpful advise. This is the exact issue that I as having. Your vid saved me a lot of trouble shooting time. Thanks

[@vince2850]

You are welcome! :)

[@andrewlegare8545]

I have had the same problem with my brand new barely 1 year old 50ELPT Mercury! I just replaced this part and am hoping for not too cold weather sometime in the next couple of days to test it. The $88 part was easy to replace and I am hopeful that it is now ok! My problem was exactly as described, and though the motor is pretty new the part does have some discoloration/possible corrosion on it on the visible side. Will get back and post after test. Knocking on wood.

[@vince2850]

Hi Andrew! I hope this fixes your problem, please let me know if your engine is running well after replacing the part! :) good luck!

[@peoriaos6627]

Thank you. I'm really unhappy with this Mercury motor . Brand new, I haven't even had this thing for a year and already it's broken down two times.

[@vince2850]

Mercury's are not that bad though, you can go with a Yamaha next time, but before you change check locally if you have parts available

[@fishingaddict5638]

I’ve got the same issue on a 50HP. I will try the part you suggest. Thank you for posting.

[@vince2850]

Keep me posted if you fix it and what was the problem please :)

[@fishingaddict5638]

The problem was exactly the same as yours. I've been pulling my hair out trying to figure out what the issue could be. I kind of thought it could be the IAC, but had no way of troubleshooting it. I'll let you know what happens after I replace it and test it out.

[@vince2850]

@@fishingaddict5638 cool! thanks a lot and good luck! I did this video since nobody talked about this issue on KZbin and there is not much info online on outboards. keep me posted :)

[@mustangracer5124]

Sometimes the valve part loses a little vacuum and flutters. Maybe a crack or just worn parts.

[@sumobear2031]

Thanks, i have the same problem on my 9.9, so i will mention this to the engineer as so far the problem has gone unresolved

[@vince2850]

Thanks, let me know if you fixed it and how please?

[@GetOutTheHouseGoFish]

Good info; just recently purchased a new 2021 Mako Skiff 15 and the 2nd time taking it out the hose on the IAC popped off and I couldn’t figure out what happened. Dealer had it a week to reattach the hose and then zip tied them down so it wouldn’t happen again.

[@vince2850]

I am glad you figured it out! :) I would find a better solution than a zip tie if possible though.

[@bruceadams5597]

Thanks for your video. Most helpful. You mentioned testing the fuel pressure….what psi should I expect?

[@vince2850]

I don't recall but you should be able to find it on Google or KZbin

[@instandfilms9843]

My Mercury 50HP efi four stroke has that part I believe and the hose that connects to it and the intake manifold is very loose. Is that normal? Can I put hose clamps or zip ties on it and tighten up the connections?

[@LancerOMD]

Hi there guys. I have another issue here, I was thinking to post just in case someone eventually faced it. 2007 Mercury 60HP EFI, i just replaced the pressure fuel pump (inside the VST), the old one was dead. Now the motor starts and runs nicely on idle. The thing is that not more than a couple of seconds in higher RPMs, it stops, like it is striving for fuel. What i noticed as soon as I removed the engine cover and touched the VST was that this last one was hot. I almost couldn't keep my hand on it, abnormally hot. What do you think? The pressure pump inside might overheat and eventually stop? I don't think there's any thermal protection on it, it looks very basic in my opinion. What do you think? Thank you.

[@vince2850]

Check your fuel inlet, sometimes the hose is delaminated due to Ethanol in the gas. Check if there is no blockage in your tank since the gas in the marinas is dirty. If your fuel pump is hot that means not much fuel is going through it. Fuel cools the pump. let us know what happened please

[@luismedina869]

Hello Lancer i have exactly the same issue , did you find the problem ?

[@lukekelly8771]

Hi I have a problem where it won’t go past 4rpm and I have the rough idle aswell and stalls do you think this will fix my issue cheers

[@obversiveKen]

Thanks for this... I have no problems yet but was curious as to the open port. It is probably an air intake on demand. Thinking I might put a piece of coffee filter over the open end to prevent dirt entry - wondering if this is the demise design built in!

[@vince2850]

Before checking that, check your fuel inlet, check if the hose is delaminated, check if there is a blockage in the tank due to impurities in the tank, the Marinas provide dirty gas full, often sand gets in the tank. If your VST is hot, it could mean not much fuel was going in it. Fuel cools fuel pumps. Let us know what it was please

[@catcheatrelease209]

Will the IAC make your engine hesitate when accelerating?

[@vince2850]

It does from Idle to acceleration

[@luismedina869]

Hello and thanks for the video, greetings to all. I changed the IAC valve and I still have the problem, did anyone find something else after changing the IAC?

[@richardmehalick9076]

Do you have a part number and location where you bought the new part?

[@richardmehalick9076]

Oops, you mentioned the part number. Where did you get it? Online or local store.

[@vince2850]

@@richardmehalick9076 Hi Richard, they should have it at a West Marine or an authorised Mercury parts dealer. You can try and get a used part as well if you want, I paid 75$CAD for a used one

[@jdgomez40]

@@richardmehalick9076 en aliexpres 15 dolars

[@waynet3454]

Thanks for the video helps lead me to my problem. Has anyone tried using a carb cleaner in the valve to see if that works to clean it out?

[@vince2850]

You can try carb cleaner but if the IAC is defective, carb cleaner will not fix it

[@richardmehalick9076]

I just ordered this part. Quick question. My current setup only has one hose connected (lower nipple). No hose on the other nipple. If that how yours is connected?

[@vince2850]

I think you are supposed to have two hoses connected, maybe look for a hose loose somewhere

[@richardmehalick9076]

@@vince2850 so you have two hoses connected?

[@richardmehalick9076]

@@vince2850 thanks for the reply. I looked at the detailed manual and it only shows the lower hose connected to the manifold. I think we have the same engine so I’m wondering where the upper hose goes. I can’t see it in the manual.

[@vince2850]

@@richardmehalick9076 I just checked my pictures and there is no hose plugged to the upper nipple. Just the lower nipple is plugged to a hose

[@richardmehalick9076]

@@vince2850 thanks for the clarification

[@snchauhan4185]

Hi my 40 hp Mercury OBM suddenly stopped at high speed please suggest me

[@vince2850]

Check your fuel inlet, sometimes the hose delaminates from the Ethanol in the gas

[@SleepingSun02]

I'm having similar issue. Rough idle most notably happens after running higher rpm then switch to low rpm. Also happens in gear at low rpm, is probably the worst for stalling. Then restart motor and idles fine again. I already switched tank, hose, fuel filters, spark plugs, thermostat, changed oil.. still having idle issue so I'm going to order a new IAC.

[@stinkboodoo2116]

Did you end up fixing this? And if so what was it

[@meganashley258]

Did you end up fixing this!?!?

[@vince2850]

Cool! let us know if you fixed it

[@SleepingSun02]

For my issue it ended up being a bad injector. Unfortunately the IAC made no difference.

[@adl2005]

Hi, whats the fuel consumption like on these engines

[@vince2850]

Cheap on gas, the thing is that the boat has to be light and no more than 2 people on board

[@calebrobert715]

@@vince2850 what length vessel do you have this engine on thanks

[@vince2850]

@@calebrobert715 hi Caleb, a 17 ft vessel, I would recommend a bigger motor, this boat would not come out of the water with 4 people on board, a 90 hp or even a 75hp would have been a better choice

[@jdgomez40]

Hola una pregunta te lo hacía solo en caliente o aveces esque me pasa eso pero solo en ocasiones cuando me lo hace me toca esperar un rato y después va bien

[@vince2850]

Hi José, it's only when the engine was hot. It would not happen when the engine was cold since the 'choke' was on

[@jdgomez40]

@@vince2850 muchas gracias mi motor me lo hace en caliente y se me para lo dejo enfriar y funciona bien ya boy a remplazarla y te comento muchísimas gracias ese falló ya me traía loco por qué no pita ni da falló solo se pone inestable el relenti y no hay como meter marcha hasta que no lo dejas enfriar no funciona

[@2751Brandon]

My motor idles good. I just can't get on plane. It stalls a 3k rpms and runs real rough. I just don't want to change a bunch of stuff.

[@the4hunters]

verynice