As a professional small engine repair technician, I often encounter riding mowers equipped with the Nikki carburetor. While these carburetors are functional and rebuildable, they are notorious for being problematic. In contrast, the Walbro carburetor offers numerous benefits, making it a superior choice for performance and reliability. Swapping or upgrading from a Nikki to a Walbro carburetor is beneficial and relatively straightforward for anyone with basic mechanical skills. Walbro STYLE 5-4993 with Mounting Gasket a.co/d/fPki9my NIKKI Style Carburetor (If you prefer to keep the original style) a.co/d/57WdZ3r Fuel Filter 10 pack - As seen in the Video with magnets a.co/d/cJD9i5g Benefits of Upgrading to a Walbro Carburetor Enhanced Performance and Reliability: The Walbro-style carburetor is known for its consistent performance and robust construction. Unlike the Nikki carburetor, which frequently suffers from fuel flow issues and inconsistent idle, the Walbro ensures a smoother and more reliable operation. This translates to less downtime and fewer headaches for the mower owner. Easier Adjustments and Maintenance: Walbro carburetors are designed with user-friendly adjustments in mind. The tuning screws are more accessible and responsive, allowing for precise adjustments to the air-fuel mixture. This ease of adjustment can significantly improve the mower's performance and fuel efficiency. Durability and Longevity: Walbro-style carburetors are built to withstand the rigors of regular use. This durability means fewer replacements and repairs over the mower's life, providing long-term cost savings for the owner. Ease of Swapping or Upgrading Compatibility: Most riding mowers with a Nikki carburetor are compatible with Walbro replacements. The mounting points and connections align well, making the physical swap straightforward. Step-by-Step Process: Ensure the engine is cool. Disconnect the spark plug to prevent accidental starting. Removal of the Nikki Carburetor: Drain the fuel or pinch the fuel line shut; if your mower has a fuel shutoff, simply shut off the fuel flow, remove the air filter housing, and disconnect the fuel line and throttle linkage. Unbolt the Nikki carburetor from the engine. Installation of the Walbro Carburetor: Bolt the Walbro carburetor onto the engine, reconnect the fuel line and throttle linkage and reattach the air filter housing. Please make sure all connections are secure. Adjustment: Once installed, the Walbro carburetor may need some fine-tuning. Start the engine and adjust the air-fuel mixture and idle speed to achieve optimal performance. Upgrading from a Nikki to a Walbro-style carburetor greatly benefits any riding mower owner. The process is relatively simple and can be accomplished with basic tools and mechanical know-how. The improved performance, reliability, and ease of maintenance offered by the Walbro-style carburetor make it a worthwhile investment, ensuring your mower runs smoothly and efficiently for years. Below are tools I use in my shop and on my daily adventures. Mini Tire Changer for mower, go-kart, and most small tires. amzn.to/31eHgGp The drill bits I use are lifetime-warranted Molybdenum from Drill Hog. www.amazon.com/dp/B010US18BG/?tag=eagle0f1-20 Hand crank trailer winch with strap with safety hook amzn.to/3jTBzEL Titanium MIG 140 Welder Works with Flux Core (No Gas needed - 110 volts) amzn.to/3mqj3oP Titanium MIG 170 Welder Works with Flux Core or Gas (110 or 220 volts) bit.ly/3k8GUrD Amazon Wish List a.co/cWseC8V As an Amazon Affiliate, I earn from qualifying purchases. These links help you find the products I've used in this video. Clicking these links will take you straight to the products on Amazon and help support this channel without costing you anything extra. Get the Motion Hero Pack that I use in my videos for Only $37 one-time investment. Use unlimited times on your own and client videos! baldeagle242--videohero.thrivecart.com/motion-hero-pack-1/ If you're a video creator on CZcams - Tube, Buddy is an excellent program to evaluate your videos and make recommendations to help you attract more viewers. www.tubebuddy.com/Baldeagle242 BALDEAGLE242 Facebook group facebook.com/profile.php?id=100068248886396 00:00 Introduction 00:26 Let's Get Started! 00:56 Safety First, Easy way to shut off the fuel. 01:17 Additional items to consider replacing. 01:33 Propper way to install a new fuel filter - Explained. 02:03 What tools you will need
Nice job Steve! As always your videos are spot on and to the point. Putting the Walbro style carb on as a replacement seems to be a no brainer and i agree you dont need the anti backfire solenoid. The people that shut their engines off at wide open throttle , i bet they dont do that to their cars 😂😮. 🤯 🇺🇸
I have used a lot of the Chinese carburetors for replacements and have had good luck with them. They are good cost effective carburetors. I have used them on both 2 cycles and 4 cycles.
When my lawnmower kept back firing, blowing black smoke out, I talked to the repair shop owner, he said " bad carb., needs replacing, $125.00 plus labor. At the time I purchased another Nikki, it was $19.99 from Amazon. I installed it, mower fired right up. The engine crankcase was full of gas, had to change oil as he stated in the video. Mower had no fuel shut off valve at that time. THANKS!! Baldeagle242!! Appreciate your time & information!
Bald Eagle your the man! I followed your other video and rebuilt my Nikki carb. Stopped flooding and leaking gas into the oil but was surging like crazy. Watched this video Friday or Saturday and ordered the exact carb you show here. Chinese walbro knockoff. Put her on and set the needle jet to 1-1/2 turns and started idle screw at 2 turns and adjusted. Fired right up no surge. I’m pumped. Thanks so much. You earned a subscriber.
+@michaelc.6927 Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
+@kevinanderson9093 Thanks for watching! Here’s a link to other videos I’ve posted that you may find useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
Yep, I’ve only bought a few name brand carbs in 30 years of doing this kind of stuff. A lot of the stuff I work on isn’t worth the cost of a name brand carburetor.
Great video 👍 I have I think about a 2002 model Briggs 17hp Twin 2 opposed twin flat head engine on a Snapper rear engine rider that has a Nikki carb without the solenoid. I'm thinking that this swap would work on it as well. I have a question for you also if you can help. I'm working on my bro in laws little Craftsman 29cc 4 cycle lawn edger and it has the Walbro model WYLB 5A carb on it. It runs smooth up until about half throttle but anything past that it sounds like a 2 cycle engine that's tuned too rich, I think people call it 4 cycling. This carb only has a low speed mixture screw hidden down into a hole on top where the throttle lever attaches and no high speed mixture screw and the diaphragm isn't stiff or torn. I took the carb apart mostly, except I didn't take the diaphragm off for fear of tearing it, but I'm gonna spray it out with carb spray real good and if that doesn't fix it I'll be scratching my head because I'm not sure what else it would be. I'd like to replace it with a fully adjustable carb is what I'd like to do. Do you have any advice or do you know if there's a fully adjustable carb that will work on it? Thank you! 👍
+@philliphall5198 Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
Nice video baldeagle! Have liked, subscribed, and added to my small engine play list. Need your recommendations for a mower problem. I have Walbro carb 0410 497119 with leaky needle valve on Troy Bilt 33" 34342 walk behind mower. Engine is B&S 9 hp model 29E702, and original carb or parts are no longer available from Walbro. Is an aftermarket carb available to satisfactorily replace it? I searched online but was unsuccessful. I am assuming the 5-4993 is not compatibly with this 9 hp engine.
Do you have a part number for the walbro with the solonoid? Thanks!! Oh did you connect the thin wire linkage in this video? I didn’t see it connected.
@@regularguy519 I’ve not seen an aftermarket with the solenoid for a few years. Here’s a link to an OEM carb. amzn.to/4bSvu2R You may be able to find someone selling the aftermarket ones on eBay.
I replaced a NIKKI carburetor with a 3rd party NIKKI style carburetor same as the one you linked to. This led to surging when the mower was idling. I adjusted the mix screws and I could make the engine idle without surging but the idle was really high. Multiple social media sites said the Chinese knock-off was to blame. That the jets are different, etc. I'm trying to frankenstein a carb from the original NIKKI and the WALBRO 3rd party version. I'm finding the main jet doesn't fit correctly in the plastic riser with the O-ring on it properly. It seems that the O-ring is too large. Any advice?
Surging in small engines is usually caused by one of two common issues: either the engine is getting too much air (lean condition) or it’s not getting enough fuel. Here’s how to properly address the problem: 1. Check for air leaks: Start by inspecting the carburetor and intake manifold for any signs of air leaks around the seals or gaskets. A simple way to check is to spray carb cleaner or starting fluid around the gasket areas while the engine is running. If the engine’s RPM changes when you spray, there’s likely an air leak that needs attention. 2. Carburetor jets: Once you’ve ruled out air leaks, the next step is to ensure the carburetor’s jets are clean. A clogged main or pilot jet is a common cause of surging. Disassemble the carburetor and inspect both jets carefully. Clean them with carb cleaner and compressed air, making sure to clear any debris. 3. Inspect the carburetor quality: If you’re using an aftermarket or knock-off carburetor, it’s not uncommon to find manufacturing defects, such as debris or improperly sized jets. I’ve seen cases where aluminum shavings were left inside brand-new carburetors, blocking proper fuel flow. Always thoroughly clean new carburetors before installation. 4. Jet sizing: If the carburetor you installed is still surging after cleaning, it’s possible that the jet size is incorrect for your engine. If you have the original carburetor, measure the jet size by finding a drill bit that fits snugly through the original jet. You can then compare or resize the new carburetor’s jet using the same drill bit, but I recommend being cautious and accurate to avoid creating other performance issues. By following these steps, you should be able to resolve most surging problems in small engines.
I've had so much trouble finding a replacement Walbro carb for my engine (18hp 31H777). The manual has part numbers for the Nikki, but not for the Walbro. Everything I find says the Nikki is the replacement, but I see tons of stuff online saying they aren't great. The Walbro looks exactly like the one I took off, but it doesn't list my engine as one it's compatible for. Should it work, or should I just go with the Nikki?
+@norcoauctions Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
+@hoosierpinchedaddy6370 Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
As a professional small engine repair technician, I often encounter riding mowers equipped with the Nikki carburetor. While these carburetors are functional and rebuildable, they are notorious for being problematic. In contrast, the Walbro carburetor offers numerous benefits, making it a superior choice for performance and reliability. Swapping or upgrading from a Nikki to a Walbro carburetor is beneficial and relatively straightforward for anyone with basic mechanical skills.
Walbro STYLE 5-4993 with Mounting Gasket
a.co/d/fPki9my
NIKKI Style Carburetor (If you prefer to keep the original style)
a.co/d/57WdZ3r
Fuel Filter 10 pack - As seen in the Video with magnets
a.co/d/cJD9i5g
Benefits of Upgrading to a Walbro Carburetor
Enhanced Performance and Reliability: The Walbro-style carburetor is known for its consistent performance and robust construction. Unlike the Nikki carburetor, which frequently suffers from fuel flow issues and inconsistent idle, the Walbro ensures a smoother and more reliable operation. This translates to less downtime and fewer headaches for the mower owner.
Easier Adjustments and Maintenance: Walbro carburetors are designed with user-friendly adjustments in mind. The tuning screws are more accessible and responsive, allowing for precise adjustments to the air-fuel mixture. This ease of adjustment can significantly improve the mower's performance and fuel efficiency.
Durability and Longevity: Walbro-style carburetors are built to withstand the rigors of regular use. This durability means fewer replacements and repairs over the mower's life, providing long-term cost savings for the owner.
Ease of Swapping or Upgrading
Compatibility: Most riding mowers with a Nikki carburetor are compatible with Walbro replacements. The mounting points and connections align well, making the physical swap straightforward.
Step-by-Step Process:
Ensure the engine is cool. Disconnect the spark plug to prevent accidental starting.
Removal of the Nikki Carburetor: Drain the fuel or pinch the fuel line shut; if your mower has a fuel shutoff, simply shut off the fuel flow, remove the air filter housing, and disconnect the fuel line and throttle linkage. Unbolt the Nikki carburetor from the engine.
Installation of the Walbro Carburetor: Bolt the Walbro carburetor onto the engine, reconnect the fuel line and throttle linkage and reattach the air filter housing. Please make sure all connections are secure.
Adjustment: Once installed, the Walbro carburetor may need some fine-tuning. Start the engine and adjust the air-fuel mixture and idle speed to achieve optimal performance.
Upgrading from a Nikki to a Walbro-style carburetor greatly benefits any riding mower owner. The process is relatively simple and can be accomplished with basic tools and mechanical know-how. The improved performance, reliability, and ease of maintenance offered by the Walbro-style carburetor make it a worthwhile investment, ensuring your mower runs smoothly and efficiently for years.
Below are tools I use in my shop and on my daily adventures.
Mini Tire Changer for mower, go-kart, and most small tires.
amzn.to/31eHgGp
The drill bits I use are lifetime-warranted Molybdenum from Drill Hog.
www.amazon.com/dp/B010US18BG/?tag=eagle0f1-20
Hand crank trailer winch with strap with safety hook
amzn.to/3jTBzEL
Titanium MIG 140 Welder Works with Flux Core (No Gas needed - 110 volts)
amzn.to/3mqj3oP
Titanium MIG 170 Welder Works with Flux Core or Gas (110 or 220 volts)
bit.ly/3k8GUrD
Amazon Wish List
a.co/cWseC8V
As an Amazon Affiliate, I earn from qualifying purchases. These links help you find the products I've used in this video. Clicking these links will take you straight to the products on Amazon and help support this channel without costing you anything extra.
Get the Motion Hero Pack that I use in my videos for
Only $37 one-time investment. Use unlimited times on your own and client videos!
baldeagle242--videohero.thrivecart.com/motion-hero-pack-1/
If you're a video creator on CZcams - Tube, Buddy is an excellent program to evaluate your videos and make recommendations to help you attract more viewers.
www.tubebuddy.com/Baldeagle242
BALDEAGLE242 Facebook group
facebook.com/profile.php?id=100068248886396
00:00 Introduction
00:26 Let's Get Started!
00:56 Safety First, Easy way to shut off the fuel.
01:17 Additional items to consider replacing.
01:33 Propper way to install a new fuel filter - Explained.
02:03 What tools you will need
do you have a link where you buy from? also can I get it with the solenoid
Great Video, thanks for taking the time and explanation of the carburetors and to stop that back fire... till next time have a good one my friend.
Thank you, Rich; this is much easier and less costly than most people realize.
Nice job Steve! As always your videos are spot on and to the point. Putting the Walbro style carb on as a replacement seems to be a no brainer and i agree you dont need the anti backfire solenoid. The people that shut their engines off at wide open throttle , i bet they dont do that to their cars 😂😮. 🤯 🇺🇸
Thank you Roger. I appreciate the kind words. Nothing amazes me anymore with the way people treat their equipment. 🤦🏻
Always detailed and great information. Thank you for taking the time to share your knowledge Steve 😎🇺🇸
Thanks Alex, this was one that I made the fuse video on a couple weeks ago.
I’ve been watching you grow my friend! Keep up the great work! 😁👍
I have used a lot of the Chinese carburetors for replacements and have had good luck with them. They are good cost effective carburetors. I have used them on both 2 cycles and 4 cycles.
Same here. I’ve only bought a few name brands in 30 years of doing this for customers that won’t take anything less.
@@baldeagle242
If a customer wants only original equipment, that's fine as long as they don't mind paying the extra cost. Most of mind don't want to
I’ve had a few but when you show most it’s literally 10 times more they have a change of heart.
When my lawnmower kept back firing, blowing black smoke out, I talked to the repair shop owner, he said " bad carb., needs replacing, $125.00 plus labor. At the time I purchased another Nikki, it was $19.99 from Amazon. I installed it, mower fired right up. The engine crankcase was full of gas, had to change oil as he stated in the video. Mower had no fuel shut off valve at that time. THANKS!! Baldeagle242!! Appreciate your time & information!
It’s a very common issue. The Walbro style carbs are much less likely to have this issue.
Thanks for watching and taking the time to leave a comment.
Bald Eagle your the man! I followed your other video and rebuilt my Nikki carb. Stopped flooding and leaking gas into the oil but was surging like crazy. Watched this video Friday or Saturday and ordered the exact carb you show here. Chinese walbro knockoff. Put her on and set the needle jet to 1-1/2 turns and started idle screw at 2 turns and adjusted. Fired right up no surge. I’m pumped. Thanks so much. You earned a subscriber.
Thank you my friend. I’m happy to have you here and glad it helped. 😁👍
Awesome video thanks for sharing this oh awesome sticker board
Thank you David! I appreciate the kind words and happy to see you stop by. Hopefully you’re doing well. 😁👍
Nice video Steve, thanks. 👍
Thank you John, I hope you and the family are doing well. I still need to take some time and go live with you guys. 🤦🏻
LoL, yes sir we’re doing good. Come on down!!! 🙂👍🏼
Excellent information video Steve well done 👍
Thank you my friend! How have you been?
@@baldeagle242 Doing ok Steve busy in garden as weather is finally getting better here in uk
@tinkeringtaylor3053 Same here! We just planted tomatoes, Zucchini, squash and a full bed of strawberries. 😁👍
Thanks for your video, I have a 26 hp briggs that I am thinking on switching carbs.
+@michaelc.6927 Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
TY for Sharing
You’re welcome! I appreciate you stopping by and taking the time to leave a comment. 😁👍
Enjoyed the video. Been wanting to switch from the Nikki carb. But couldn’t get the walbro carb #. Thanks for putting it in your description
+@kevinanderson9093 Thanks for watching! Here’s a link to other videos I’ve posted that you may find useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
Walbro.... I call those aftermarket lol 🤣 it's even easier and cheaper
Yep, I’ve only bought a few name brand carbs in 30 years of doing this kind of stuff. A lot of the stuff I work on isn’t worth the cost of a name brand carburetor.
Great video 👍
I have I think about a 2002 model Briggs 17hp Twin 2 opposed twin flat head engine on a Snapper rear engine rider that has a Nikki carb without the solenoid. I'm thinking that this swap would work on it as well.
I have a question for you also if you can help. I'm working on my bro in laws little Craftsman 29cc 4 cycle lawn edger and it has the Walbro model WYLB 5A carb on it. It runs smooth up until about half throttle but anything past that it sounds like a 2 cycle engine that's tuned too rich, I think people call it 4 cycling. This carb only has a low speed mixture screw hidden down into a hole on top where the throttle lever attaches and no high speed mixture screw and the diaphragm isn't stiff or torn. I took the carb apart mostly, except I didn't take the diaphragm off for fear of tearing it, but I'm gonna spray it out with carb spray real good and if that doesn't fix it I'll be scratching my head because I'm not sure what else it would be. I'd like to replace it with a fully adjustable carb is what I'd like to do. Do you have any advice or do you know if there's a fully adjustable carb that will work on it?
Thank you! 👍
Well explained 😊😊 thank you
+@philliphall5198 Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
Shut off manual fuel valve and let it run out of gas
No back fire 😊
+@philliphall5198 😁👍
Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
Nice video baldeagle! Have liked, subscribed, and added to my small engine play list. Need your recommendations for a mower problem. I have Walbro carb 0410 497119 with leaky needle valve on Troy Bilt 33" 34342 walk behind mower. Engine is B&S 9 hp model 29E702, and original carb or parts are no longer available from Walbro. Is an aftermarket carb available to satisfactorily replace it? I searched online but was unsuccessful. I am assuming the 5-4993 is not compatibly with this 9 hp engine.
I’m not real familiar with that combination. I was hoping someone else may be able to help but so far I don’t see any replies.
Now do it to a Kohler Courage.
Do you have a part number for the walbro with the solonoid? Thanks!! Oh did you connect the thin wire linkage in this video? I didn’t see it connected.
@@regularguy519 I’ve not seen an aftermarket with the solenoid for a few years. Here’s a link to an OEM carb. amzn.to/4bSvu2R
You may be able to find someone selling the aftermarket ones on eBay.
I replaced a NIKKI carburetor with a 3rd party NIKKI style carburetor same as the one you linked to. This led to surging when the mower was idling. I adjusted the mix screws and I could make the engine idle without surging but the idle was really high.
Multiple social media sites said the Chinese knock-off was to blame. That the jets are different, etc.
I'm trying to frankenstein a carb from the original NIKKI and the WALBRO 3rd party version. I'm finding the main jet doesn't fit correctly in the plastic riser with the O-ring on it properly. It seems that the O-ring is too large.
Any advice?
Surging in small engines is usually caused by one of two common issues: either the engine is getting too much air (lean condition) or it’s not getting enough fuel. Here’s how to properly address the problem:
1. Check for air leaks: Start by inspecting the carburetor and intake manifold for any signs of air leaks around the seals or gaskets. A simple way to check is to spray carb cleaner or starting fluid around the gasket areas while the engine is running. If the engine’s RPM changes when you spray, there’s likely an air leak that needs attention.
2. Carburetor jets: Once you’ve ruled out air leaks, the next step is to ensure the carburetor’s jets are clean. A clogged main or pilot jet is a common cause of surging. Disassemble the carburetor and inspect both jets carefully. Clean them with carb cleaner and compressed air, making sure to clear any debris.
3. Inspect the carburetor quality: If you’re using an aftermarket or knock-off carburetor, it’s not uncommon to find manufacturing defects, such as debris or improperly sized jets. I’ve seen cases where aluminum shavings were left inside brand-new carburetors, blocking proper fuel flow. Always thoroughly clean new carburetors before installation.
4. Jet sizing: If the carburetor you installed is still surging after cleaning, it’s possible that the jet size is incorrect for your engine. If you have the original carburetor, measure the jet size by finding a drill bit that fits snugly through the original jet. You can then compare or resize the new carburetor’s jet using the same drill bit, but I recommend being cautious and accurate to avoid creating other performance issues.
By following these steps, you should be able to resolve most surging problems in small engines.
@@baldeagle242 you are amazing! Thank you for giving me some troubleshooting steps. I will work on it today.
I've had so much trouble finding a replacement Walbro carb for my engine (18hp 31H777). The manual has part numbers for the Nikki, but not for the Walbro. Everything I find says the Nikki is the replacement, but I see tons of stuff online saying they aren't great. The Walbro looks exactly like the one I took off, but it doesn't list my engine as one it's compatible for. Should it work, or should I just go with the Nikki?
where can I buy a Walbro carb?
I like you. Thanks for sharing
+@norcoauctions Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
Excellent video! New sub here! Thank you, sir.
+@hoosierpinchedaddy6370 Thanks for watching! Hopefully you’ll find other videos I’ve posted interesting or useful. czcams.com/play/PL5_ZXmQpcjpac4UV8OW8g-IWVCR8tqy79.html&si=RKfnQL-PAcZFy67a
@@baldeagle242 Indeed, thank you.