I just want to say I've watched several videos on why a fuel pump goes bad and you're the only one who explain it.Bravo continue what you do buddy you're good
This is very helpful. I will order two pumps and precut the fuel line and have it on the pump so if a fuel line fails I will have that covered as well. Thank You!
Great video! Really enjoy your channel!!! Please help?? Hey team We have a 1977 Johnson 9.9. We loose power/engine speed under load. When running via the ear muffs we get high revs, but when in the water we get no decent boat speed and less revs. We have brand new fuel lines, fuel pump replacement kit installed, strong spark, new spark plugs, holds pressure at 105 in each spark plug, carby has been been repaired, float looks good and all clean. Previous owner has added an extra rubber ‘ring’ to the roller on the cam follower - which make the throttle open before it gets to the marker on the throttle control cam. Could this interrupt the ignition timing enough to cause loss of power under load? We are using premium (98) gasoline with 50:1 ratio to oil TCW3. Should we use something lower like 91? Also the tank we are running has a small amount of 2stroke engine cleaner, could that be it? (Going to try fresh petrol this weekend with out cleaner). Could we have missed anything with the carb? Should we remove and replace the top plug and air bleed nozzle - even if they look fine? What other air tests can we perform on the carbie to make sure it’s 100% Thanks in advance for any advice!! Cheers
I had classic symptom of a bad fuel pump, carburator bowl was not filling after a minute or two of running. I replaced with a new pump. Now cannot get fuel to flow through the pump. When I prime the system with the squeeze bulb at the tank, fuel is blocked at the new pump. Pulling the starter cord does not help. This is a johnson 35 hp 1984.
LOL, I got the fuel hoses reversed when I installed the new pump . I was trying to supply fuel to the outflow side. Lesson learned: take a photo before you disassemble.
I replaced the fuel pump, replaced spark plugs, made sure it had new fuel, cleaned carb.. still can’t get it to start. The flywheel key is in place, there is spark and compression is good. I feel like the spark plugs are fairly clean though and not getting soaked with gasoline. If I remove the hose from the pump to the carb on the carb end and I pull to start no gas comes out. If I press the bulb the gas shoots out. Did I get a bad fuel pump or maybe it needs to go a different direction? I’m going to get some starter fluid in a can tomorrow and shoot it down the carb while I try starting it to see if it starts.
First reason is a low quality material (the flexible diaphragm). Second reason is dirt can get stuck in the fuel pump valves. If you add fuel filter this is going to eliminate one of the reasons.
I just want to say I've watched several videos on why a fuel pump goes bad and you're the only one who explain it.Bravo continue what you do buddy you're good
Thanks!
Love from Florida. You are a badass thank you!!!
Thanks!
Thank you!
This exact thing just happened to me this weekend.
I’m ordering a new fuel pump and fuel filter.
One of the best outboard videos ive ever seen. Important details, tips, no nonsense. Cant wait to watch more of these.
Thanks!
This is very helpful. I will order two pumps and precut the fuel line and have it on the pump so if a fuel line fails I will have that covered as well. Thank You!
Good work on the video. Thank-you.
Thanks!
Very good video. Thank you
You're welcome!
love your bracket and table set up,. I'm gonna make me one like that, good idea👍🏾
Great video! Really enjoy your channel!!!
Please help??
Hey team
We have a 1977 Johnson 9.9. We loose power/engine speed under load. When running via the ear muffs we get high revs, but when in the water we get no decent boat speed and less revs.
We have brand new fuel lines, fuel pump replacement kit installed, strong spark, new spark plugs, holds pressure at 105 in each spark plug, carby has been been repaired, float looks good and all clean.
Previous owner has added an extra rubber ‘ring’ to the roller on the cam follower - which make the throttle open before it gets to the marker on the throttle control cam. Could this interrupt the ignition timing enough to cause loss of power under load?
We are using premium (98) gasoline with 50:1 ratio to oil TCW3. Should we use something lower like 91? Also the tank we are running has a small amount of 2stroke engine cleaner, could that be it? (Going to try fresh petrol this weekend with out cleaner).
Could we have missed anything with the carb? Should we remove and replace the top plug and air bleed nozzle - even if they look fine? What other air tests can we perform on the carbie to make sure it’s 100%
Thanks in advance for any advice!!
Cheers
Hola amigo, alguna vez has fabricado tu propio diafragma para esas bombas, que material recomendarias?. Gracias, excelente video.
Puedes comprar la bomba de combustible en eBay. 0397839 - Fuel Pump, 18-7350 - Fuel Pump.
I use 4mm fuel line from fuel pump to carburator and it's fitting well. Is that okay to use it in 4hp evinrude?
Yes
Good/honest/useful tips!
I would be curious if yellow clear hose is actually ok to install permanent to replace black hose..
I believe you can use it permanently as long as its fuel line from motorcycles.
Thanks!
I had classic symptom of a bad fuel pump, carburator bowl was not filling after a minute or two of running. I replaced with a new pump. Now cannot get fuel to flow through the pump. When I prime the system with the squeeze bulb at the tank, fuel is blocked at the new pump. Pulling the starter cord does not help. This is a johnson 35 hp 1984.
I believe the new pump is defective.
LOL, I got the fuel hoses reversed when I installed the new pump . I was trying to supply fuel to the outflow side. Lesson learned: take a photo before you disassemble.
i have a 9.9 evinrude. it bogs down under load. i rebuilt the carb and replaced the spark plugs but it still does the same thing. what do i do?
Check the spark plugs.
I replaced the fuel pump, replaced spark plugs, made sure it had new fuel, cleaned carb.. still can’t get it to start. The flywheel key is in place, there is spark and compression is good. I feel like the spark plugs are fairly clean though and not getting soaked with gasoline. If I remove the hose from the pump to the carb on the carb end and I pull to start no gas comes out. If I press the bulb the gas shoots out. Did I get a bad fuel pump or maybe it needs to go a different direction? I’m going to get some starter fluid in a can tomorrow and shoot it down the carb while I try starting it to see if it starts.
Will you do a video on spark plugs. Thanks
Yes
Where are you located? I’ve tried fixing mine but no luck 😭
Phoenix
What size screws? Thanks.
Nice video! Link to buy a pump?
Make sure to choose the correct year and model: www.marineengine.com/parts/johnson-evinrude-parts.php
Hi What caused the fuel pump to fail? Because in the span of 6 months, he changed three times, and I don't know why
First reason is a low quality material (the flexible diaphragm). Second reason is dirt can get stuck in the fuel pump valves. If you add fuel filter this is going to eliminate one of the reasons.
Would a faulty fuel pump cause loss of power?
Yes
Can bad fuel pump cause to burn up piston rings and melt piston?
No