This was a tremendous help. Carbs were overhauled 18 months ago, though clogged up again.... watched this, pulled them apart and back together again. Working beautifully. Thank you for taking the time to show this! Saved me $$$$!!!
I am again going to thank you for the excellent video. I just did the Carbi removal and clean as you show in your video and had excellent results. My motor was leaking gas by just pumping the bulb, and now it runs great. Easier that it looks but not for beginners I guess. The screws on my bottom 2 float bowls were corroded nightmares and took quite awhile to remove without damaging the carbi. Motor might have went swimming in salt water. Bought as parts motor, was seized, now runs great..............thanks........................
Hello Todd, This video was excellant! As a result I found the courage to tackle this project, completing same using exactly the parts you listed. A daunting task, but 5 hours later she seems to idle great! A sea trial will be the real test, for I may have to tweek the idle mixture screws. For now just set back 2 1/4 turns from a light seat. Many Thanks, John
Help thanks again I got it done today. Set up my table in garage and pause your video step by step. The little things you didn't show that needed to be done were all simple. Thanks
Thank you for this. Watched it several times skipping to most interesting parts just to see what it takes to do the job. Helped me to get part numbers and manuals. Now I have all I need and watched it again completely. I took a step up and got myself 3 ltr ultrasonic cleaner and some cleaning liquids. This will be fun. Thanx again. You did it better than most of DIYers here.
This is awesome! Whish I had found it two months back! I'll be replacing spark wires and fuel pumps and if shortly after rebuilding the carbs. Mines the bf90ax and I really appreciate the measured pace of your video.
Great video! It's important to inspect the slow jet emulsion tubes VERY carefully. Not only do they contain an internal, very small, lengthwise jet that is quite prone to plugging, these tubes are also prone to developing lengthwise cracks. I inspected mine with a magnifying glass and all 4 tubes were cracked! The cracks were along the narrow part of the tube, near the end that does not have the "o" ring. I replaced all 4 tubes with new. The engine ran great for a couple of days, and then crappy again. So I disassembled the carbs and one of the brand-new slow jet emulsion tubes had developed a crack. This crack, about 1/4" long, was virtually invisible, even with a magnifying glass. I discovered the crack when I was blowing brake cleaner through the tube and cleaner fluid blew out through the crack in the side of the tube. The engine is now running great. No more problems.
Just came across your video, very detailed. A mate has a BF90 so this video will certainly help in tackling his fuel issue (a load of sediment went through the system).
what a fantastic video i have the same engine Honda bf 90 you have made my day always wondered how to do my carbs now i know as daft as it seems can you show how you took your cables off cheers jimmy from england
Thanks great video, it really helped a lot. I have the exact motor and have the same problem but after reassembly I don’t need my choke now to run but I still have to give it 3/4 throttle. I was wondering does the slow jet emulsion tube in the very center have a hole that runs from one end completely through to the other I can only fit a cleaning rod partially through? I did clean all the small jet holes on the outside of the tube. I hope you see this message thank you in advance
Thanks for the video, I removed the linkage and the bolts and nuts but am having a hell of a time getting the manifold off. It has never been removed. Is there any other tricks to it?
Excellent tutorial! I have a question....how did you remove the idle mixture screw? Instructions in manuals don’t make it clear. The screw turns, but is stopped by the offset ‘lug’ hitting the carb body.
I'm working on a 75hp Honda and stuck trying to remove the slow jet and main tube and need advice on how to remove safely since most parts are discontinued any advice? thanks
Does the smaller pilot emulsion tube open down through the middle? If so, mine is plugged pretty solid and a small needle will not go though any opening.
Love the video Todd... my motor looks exactly the same but is 75hp so I think mine is a BF75A but not sure because all I can find is a serial number on my outboard. I am wondering if the carburetor rebuild kits would be the same as the 90hp models? The only number I can find is BBAL 4600772 AND does not seem to match up with anything on Google. Do you have any advice?
Thanks Todd for the well done video. It has inspired me to rebuild my BF90AT Carburetors. Where did you obtain that first pamphlet "FUEL SYSTEM" - 'Carburetor Removal/Installation'? I was able to locate the "Carburetion Manual" online, I'm just not able to find the other one. Please help
Thanks a lot for the manual, much appreciated :). I'm ready and set to start the tear down, clean, and reassembly. I cross referenced the gaskets and the carbi seal kits in your vid and it appears they are the same as my engine assembly. Were there any other parts, you ended up replacing, that weren't cataloged in your video? I bought all the gaskets and seal kits. How about fuel line tubes, check valves? Just wanting to be prepared as much as possible to prevent any possible hangups. Thanks again.
Hello! Do you think it is possible to just remove the bowl from the carb and then take the slow jet out for inspection? So I don't need to take the whole thing apart. Just want to inspect my slow jets. My bf40 is running a bit weird on idle..
My bf 90 a alarm goes off continuously. Oil pressure perfect . Cooling system operating perfect. I unhooked the alarm and have ran thousand hours no problems . Two mechanics couldn't figure out why it was sounding . Any ideas?
Hi I have the same outboard same thing was happening to mine my alarm was going off every 10 to 15 min on my controls have to lil lights one for oil and other for over heating the over heating light kept coming one I flushed it out for good hour with garden hose and muffs after that seemed to be ok plus I took the thermostat off and cleaned in and around that area not sure why it went that way what was ur problem did u find a solution?
You don't need to ever remove your carbs. Run B12 chemtool in your gas at all times, in somewhat more generous dose, that's all it takes, and forget removing and cleaning
Todd Chapman that long tube, slow jet emulsion tube, appears plugged near the end without o-ring. It's been that in 2 of the carbs. Have not started 3rd. I can't find any indication if that's correct or not though. It seems like it's two parts.
Found someone else video of a smaller engine, same carb, rebuild showing it's got a hole in it. Does that carburetor manual specify the interior diameter of the hole inside the emulsion tube? Up at where there's a second 1cm pipe expanding its diameter. I think there might be a lip or something inside at that point.
3rd carb has a pin hole through the length of the emulsion tube. Need to inspect the first 2 carb again. Ordering new tubes along with the manifold gasket. All other gaskets are still pristine from last shop rebuild.
MikeTLive your on the right track, always safe to order new parts if they can't be cleaned. there is no spec for internal hole on slow jet tube. if you soak all parts in carbi cleaner then blast with compressed air it should blast all holes clean and clear. a light scrub with a toothbrush will help and a needle or pin for the holes. be careful to only clear the holes don't damaged the tubes or holes or make them biggger. yes there is a hole at the end with o ring ( remember its called a slow jet emulsion TUBE) a tube has a hole should not be blocked. hope this helps, stick with it. oh just a note the specs said to when rebuild finished set the idle mixture screw to 2 1/4 turns out. however mine was a bit lean and performed much better at 3 turns out.
This was a tremendous help. Carbs were overhauled 18 months ago, though clogged up again.... watched this, pulled them apart and back together again. Working beautifully. Thank you for taking the time to show this! Saved me $$$$!!!
Thank-you for taking the time to inconvenience yourself to help all of us.
God Bless you Brother. A very BIG thanks from my family.
Getting ready to do my BF90A2 carburetor clean and gasket replacement after sitting for 6 years, going to be fun. Thanks for a great video.
I am again going to thank you for the excellent video. I just did the Carbi removal and clean as you show in your video and had excellent results. My motor was leaking gas by just pumping the bulb, and now it runs great. Easier that it looks but not for beginners I guess. The screws on my bottom 2 float bowls were corroded nightmares and took quite awhile to remove without damaging the carbi. Motor might have went swimming in salt water. Bought as parts motor, was seized, now runs great..............thanks........................
Hello Todd, This video was excellant! As a result I found the courage to tackle this project, completing same using exactly the parts you listed. A daunting task, but 5 hours later she seems to idle great! A sea trial will be the real test, for I may have to tweek the idle mixture screws. For now just set back 2 1/4 turns from a light seat. Many Thanks, John
Help thanks again I got it done today. Set up my table in garage and pause your video step by step.
The little things you didn't show that needed to be done were all simple.
Thanks
Todd. I just had to do this very procedure on my 2004 BF90 and just wanted to say thanks for posting your video. It made my repair much easier.
after 5 years i am rebuilding my carbs again :) and referring to this excellent video for support. thanks again for posting it.
Thank you for this. Watched it several times skipping to most interesting parts just to see what it takes to do the job. Helped me to get part numbers and manuals.
Now I have all I need and watched it again completely. I took a step up and got myself 3 ltr ultrasonic cleaner and some cleaning liquids. This will be fun.
Thanx again. You did it better than most of DIYers here.
Excellent video. Taking apart a 75hp this weekend. Very helpful. Thank You
I have same .
After winterizing ,I Will do this .
This is awesome! Whish I had found it two months back! I'll be replacing spark wires and fuel pumps and if shortly after rebuilding the carbs. Mines the bf90ax and I really appreciate the measured pace of your video.
MikeTLive glad others are making use of this.
Todd Chapman today I've removed the carbs. The fun begins. Suppose I should have ordered the gaskets months ago. Heh.
Great video! It's important to inspect the slow jet emulsion tubes VERY carefully. Not only do they contain an internal, very small, lengthwise jet that is quite prone to plugging, these tubes are also prone to developing lengthwise cracks. I inspected mine with a magnifying glass and all 4 tubes were cracked! The cracks were along the narrow part of the tube, near the end that does not have the "o" ring. I replaced all 4 tubes with new. The engine ran great for a couple of days, and then crappy again. So I disassembled the carbs and one of the brand-new slow jet emulsion tubes had developed a crack. This crack, about 1/4" long, was virtually invisible, even with a magnifying glass. I discovered the crack when I was blowing brake cleaner through the tube and cleaner fluid blew out through the crack in the side of the tube. The engine is now running great. No more problems.
Jim H. Your correct sir .
Just came across your video, very detailed. A mate has a BF90 so this video will certainly help in tackling his fuel issue (a load of sediment went through the system).
nice explanatory video. I had no idea I had to take the manifold off to clean the carbs. thanks for the video.
Thank you for posting but I'm sure I'm going to eff this up somehow. Thank goodness I'm working with a genius!
what a fantastic video i have the same engine Honda bf 90 you have made my day always wondered how to do my carbs now i know as daft as it seems can you show how you took your cables off cheers jimmy from england
very easy.
just undo the adjustment nuts near the brackets. this should create enough slack to remove the cables.
Muchas gracias por hacer este vídeo!!!es de gran ayuda para todos!!!
Fantastic! Methodical and thorough. Thank you
Thanks mate that was very helpful.
Hi, I found your video to be very informative, where did you buy your carbi seal kit from?
Thanks great video, it really helped a lot. I have the exact motor and have the same problem but after reassembly I don’t need my choke now to run but I still have to give it 3/4 throttle. I was wondering does the slow jet emulsion tube in the very center have a hole that runs from one end completely through to the other I can only fit a cleaning rod partially through? I did clean all the small jet holes on the outside of the tube. I hope you see this message thank you in advance
Thanks for the video, I removed the linkage and the bolts and nuts but am having a hell of a time getting the manifold off. It has never been removed. Is there any other tricks to it?
Excellent tutorial! I have a question....how did you remove the idle mixture screw? Instructions in manuals don’t make it clear. The screw turns, but is stopped by the offset ‘lug’ hitting the carb body.
Aha! I figured it out! ‘Cap’ simply is pried off ...exposing the screw.
Thanks for the helpful video!
Thanks!
I'm working on a 75hp Honda and stuck trying to remove the slow jet and main tube and need advice on how to remove safely since most parts are discontinued any advice? thanks
thanks your your time and kind sharing
In the video you said carbi 4 was the worst. Were you counting top down?
Excellent video. Thanks.
What is the part number of the slow emaltion jet tube??? Mine are cracked.
Yep number 4 is bottom one.
Does the smaller pilot emulsion tube open down through the middle? If so, mine is plugged pretty solid and a small needle will not go though any opening.
Love the video Todd... my motor looks exactly the same but is 75hp so I think mine is a BF75A but not sure because all I can find is a serial number on my outboard. I am wondering if the carburetor rebuild kits would be the same as the 90hp models? The only number I can find is BBAL 4600772 AND does not seem to match up with anything on Google. Do you have any advice?
Thanks Todd for the well done video. It has inspired me to rebuild my BF90AT Carburetors. Where did you obtain that first pamphlet "FUEL SYSTEM" - 'Carburetor Removal/Installation'? I was able to locate the "Carburetion Manual" online, I'm just not able to find the other one. Please help
Brandon Teel
(Pdf) carburetor manual - justanswer uploads jeffgr
Just type this into google.
So glad its useful.
Thanks a lot for the manual, much appreciated :). I'm ready and set to start the tear down, clean, and reassembly. I cross referenced the gaskets and the carbi seal kits in your vid and it appears they are the same as my engine assembly. Were there any other parts, you ended up replacing, that weren't cataloged in your video? I bought all the gaskets and seal kits. How about fuel line tubes, check valves? Just wanting to be prepared as much as possible to prevent any possible hangups. Thanks again.
Hello! Do you think it is possible to just remove the bowl from the carb and then take the slow jet out for inspection? So I don't need to take the whole thing apart. Just want to inspect my slow jets. My bf40 is running a bit weird on idle..
Great video bro
I set fuel separator betveen fuel tank and engine , and no have same problem ..Salute from russia /
I have 1997 Honda -90 too ..
Hi. Where can i find the manual?
donde consigio el manual de mecanica del motor
Did you sync the carbs after?
Did you have a key to take the idle screw out?
My bf 90 a alarm goes off continuously. Oil pressure perfect . Cooling system operating perfect. I unhooked the alarm and have ran thousand hours no problems . Two mechanics couldn't figure out why it was sounding . Any ideas?
Hi I have the same outboard same thing was happening to mine my alarm was going off every 10 to 15 min on my controls have to lil lights one for oil and other for over heating the over heating light kept coming one I flushed it out for good hour with garden hose and muffs after that seemed to be ok plus I took the thermostat off and cleaned in and around that area not sure why it went that way what was ur problem did u find a solution?
You don't need to ever remove your carbs.
Run B12 chemtool in your gas at all times, in somewhat more generous dose, that's all it takes, and forget removing and cleaning
How to remove Main nozzle
My emulsion tube and slow jet does not come out. How did you remove these?
Henry Rippy hard tap on bench and tweezers should work. Spray with carbide cleaner in case of bad corrosion.
Todd Chapman what did you use to tap it with? Then how about reinstall?
What year is your motor
HI DID ADD THE LINK CAN YOU HAVE A LOOK ON MY PROFILE VIDEO IS THERE THANK YOU
HI WE GOT PROBEM WITH HONDA ENGINE KNOCKING I WILL ADD LINK BELOW DOES ANBODY HAVE THE SEAME PROBLEM ? HELP NEDEED THAN YOU @
any idea if the slow jet is open straight through or supposed to be plugged?
MikeTLive
all jets. all tiny holes should be clean and clear. carby cleaner and compressed air should do the trick.
Todd Chapman that long tube, slow jet emulsion tube, appears plugged near the end without o-ring. It's been that in 2 of the carbs. Have not started 3rd. I can't find any indication if that's correct or not though. It seems like it's two parts.
Found someone else video of a smaller engine, same carb, rebuild showing it's got a hole in it. Does that carburetor manual specify the interior diameter of the hole inside the emulsion tube? Up at where there's a second 1cm pipe expanding its diameter. I think there might be a lip or something inside at that point.
3rd carb has a pin hole through the length of the emulsion tube. Need to inspect the first 2 carb again. Ordering new tubes along with the manifold gasket. All other gaskets are still pristine from last shop rebuild.
MikeTLive your on the right track, always safe to order new parts if they can't be cleaned.
there is no spec for internal hole on slow jet tube.
if you soak all parts in carbi cleaner then blast with compressed air it should blast all holes clean and clear.
a light scrub with a toothbrush will help and a needle or pin for the holes.
be careful to only clear the holes don't damaged the tubes or holes or make them biggger.
yes there is a hole at the end with o ring ( remember its called a slow jet emulsion TUBE) a tube has a hole should not be blocked.
hope this helps, stick with it.
oh just a note the specs said to when rebuild finished set the idle mixture screw to 2 1/4 turns out.
however mine was a bit lean and performed much better at 3 turns out.