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Kawasaki FB460V wont start

#1

J

jakesmurray

This motor is on a John Deere 112L riding mower. We bought it at an auction for $90, they said it would start, but wouldn;t keep running.iWell. it will not even start for us. I tried to start it as is, and nothing. Then I did the following:
-New spark plug (gapped correctly
-New air filter and precleaner
-New oil filter
-Changed oil with SAE 30
-Took off carb, cleaned it inside and out thouroughly
-Replaced fuel filter
-Emptied gas tank, then took it off the mower and cleaned it really well
-Refilled the tank with brand new gas

Here's what I know:
-It has spark
-It has good compression
-The carb is getting fuel

I can tell you that when it is cranking trying to start, you can kind of hear an abnormal clanking noise- like something is rattling inside the engine. Could that be the problem?

Please let me know if you have any suggestions, as I would really like to hear this thing run. Thank you!


#2

M

mumptia

Do you have a number on the compression? it might not have enough?

Check the lash on the valves?

Have you checked the diapraghm in the fuel pump?

If you have comp and spark and it wont start your comp might be there but be low or the spark plug is just not sparking properly under compression. Try another plug


#3

J

jakesmurray

mumptia said:
Do you have a number on the compression? it might not have enough?

Check the lash on the valves?

Have you checked the diapraghm in the fuel pump?

If you have comp and spark and it wont start your comp might be there but be low or the spark plug is just not sparking properly under compression. Try another plug
Click to expand...

I don't have a tool for the compression, but I will check on the fuel pump. I was kind of curious about that. How do you check the lash on the valves? Thanks


#4

M

mumptia

Checking lash is a bit to type out.

I have a pdf service manual for this engine and I'll e-mail it to you if you like. (the file is too big to add as an attachment on this post I guess :frown:

Hope it helps. (end of section 6)

You might need some specialty tools (pending your experience level) but its not too tough a job.

Good luck:thumbsup:

All I need is your e-mail address.


#5

J

jakesmurray

mumptia said:
Checking lash is a bit to type out.

I have a pdf service manual for this engine and I'll e-mail it to you if you like. (the file is too big to add as an attachment on this post I guess :frown:

Hope it helps. (end of section 6)

You might need some specialty tools (pending your experience level) but its not too tough a job.

Good luck:thumbsup:

All I need is your e-mail address.
Click to expand...

Thanks for the help. I actually found the service manual online, so I will take a look at it and try to adjust the valves if they need it. I'll let you know what happens. Thanks!


#6

J

jakesmurray

Ok I've got an update. I decided to put some gas straight into the carb, just to see if it would start, and it does! The bad news is that it will only run for about 5 seconds, but it runs great when its running. Do you guys think it is the fuel pump, by the way I took it off and cleaned it out inside, all of the gaskets were in great shape. I even tried to hook up an external fuel tank to it, and it won't stay running that way either. I think it needs a new rule pump, but am not certain. Can you bypass the fuel pump, or does it have to be on there? Thanks


#7

S

sss

i would NOT bypass it get all the parts to get it to how it was in the factory that way it will work the best.
good luck :thumbsup:


#8

reynoldston

reynoldston

Your fuel tank is in the rear of this mower. If you bypass the fuel pump how will the fuel get to the front where the engine is. Now if you just want to bypass the fuel pump you will have to put a fuel tank above the engine and just have gravity feed. You shouldn't need a John Deere fuel pump, any vacuum operating fuel pump should work. You might be able to rig something up just to test it.


#9

W

webuyanymower.com

You have fuel to the carb but is the spark plug getting wet. Crank the engine over and then take the plug out to check.


#10

T

taxidermist

Take off fuel line from pump to carb and crank it over see if it pumps fuel. If it does then its fine. Have someone listen at the carb while you turn on the key you should hear a click at the fuel solenoid if it has one on the bottom of carb. If it does not click then its not opening the main jet to get fuel.


Rob


#11

J

jakesmurray

sss said:
i would NOT bypass it get all the parts to get it to how it was in the factory that way it will work the best.
good luck :thumbsup:
Click to expand...

Yeah, that's what I'll probably do.


#12

J

jakesmurray

taxidermist said:
Take off fuel line from pump to carb and crank it over see if it pumps fuel. If it does then its fine. Have someone listen at the carb while you turn on the key you should hear a click at the fuel solenoid if it has one on the bottom of carb. If it does not click then its not opening the main jet to get fuel.


Rob
Click to expand...

Ok, I'll do that. It doesn't have a fuel solenoid.


#13

J

jakesmurray

Ok, the fuel pump IS working. It pumps fuel fine when the engine cranks. The spark plug appears dry after I crank it a few times. What does this indicate? Also, there is a short fuel line that goes into the engine block from the fuel pump. Could this be blocked? I have not looked at that line it yet. I appreciate everyone's help!


#14

T

taxidermist

jakesmurray said:
Ok, the fuel pump IS working. It pumps fuel fine when the engine cranks. The spark plug appears dry after I crank it a few times. What does this indicate? Also, there is a short fuel line that goes into the engine block from the fuel pump. Could this be blocked? I have not looked at that line it yet. I appreciate everyone's help!
Click to expand...

That is where your fuel pump gets vacuume from. If you get fuel from the pump then the vacuume line is working. Is there a drain on the bottom of the float bowl of the carb? if so open it and see if fuel comes out. If no fuel the needle seat is stuck and not letting the bowl fill with fuel.

Rob


#15

J

jakesmurray

taxidermist said:
That is where your fuel pump gets vacuume from. If you get fuel from the pump then the vacuume line is working. Is there a drain on the bottom of the float bowl of the carb? if so open it and see if fuel comes out. If no fuel the needle seat is stuck and not letting the bowl fill with fuel.

Rob
Click to expand...

There is fuel in the bowl- fuel drained when I loosened the screw. However, when the engine is cranking, only a trickle comes out of the fuel pump. Is this normal, or should it be a stronger stream?


#16

J

jakesmurray

Ok I just noticed something else that may be a problem. When everything is hooked up correctly, fuel is getting to the carb, but when I loosen the carb bowl nut to drain it, the fuel is tinted a brown color. Does this mean that there is something dirty in the carb or fuel tank? I have already cleaned the carb completely, so it could be the fuel tank.


#17

W

webuyanymower.com

Hi
If you have fuel in the carb but the plug is not getting wet then the fuel is not getting out of the carb and into the engine.
Start again from the beginning.
1. Remove the fuel line from the carb
2. Drain the fuel tank and dry it as best you can.
3. Flush the tank out with a little petrol
4. Check the can you keep the fuel in is it clean and rust free with no signs of water in it if you use a metal you can get a condensation build up it if it is a plastic can still check it. you don稚 want to clean everything and then fill the mower from a dirty can
5. Clean the carb again make sure the main jet is spotless if you have an airline be careful how you use it if not soak the carb in carb cleaner for a few hours again give the main jet a good squirt.
6. Reassemble. Put new clean fresh fuel in start it up and go and cut the grass.

Carbs can be tricky little devils if they are not completely clean they will play up. Work your way through the fuel system from fuel tank to spark plug and check everything is clean.


#18

J

jakesmurray

Ok, I'll do that. Thanks

webuyanymower.com said:
Hi
If you have fuel in the carb but the plug is not getting wet then the fuel is not getting out of the carb and into the engine.
Start again from the beginning.
1. Remove the fuel line from the carb
2. Drain the fuel tank and dry it as best you can.
3. Flush the tank out with a little petrol
4. Check the can you keep the fuel in is it clean and rust free with no signs of water in it if you use a metal you can get a condensation build up it if it is a plastic can still check it. you don稚 want to clean everything and then fill the mower from a dirty can
5. Clean the carb again make sure the main jet is spotless if you have an airline be careful how you use it if not soak the carb in carb cleaner for a few hours again give the main jet a good squirt.
6. Reassemble. Put new clean fresh fuel in start it up and go and cut the grass.

Carbs can be tricky little devils if they are not completely clean they will play up. Work your way through the fuel system from fuel tank to spark plug and check everything is clean.
Click to expand...


#19

W

webuyanymower.com

Hi Again
This might help Kawasaki FB460V service Manual


#20

T

taxidermist

Sounds like you have old gas in the tank for 1

As for the trickle of gas coming out.... it should be a good stream while cranking.

If the valves are out of adjustment then the vacuum from the head might be low and not allowing the fuel pump to work right.

Are you sure the plug is bone dry?

Clean the carb and make sure all the passages are very clean and that you can blow air thru fuel port. Also make sure with this carb that your needle below the float seals well. while the carb is inverted blow thru the fuel line and make sure you are not getting any air past the needle seat.


Rob


#21

J

jakesmurray

taxidermist said:
Sounds like you have old gas in the tank for 1

As for the trickle of gas coming out.... it should be a good stream while cranking.

If the valves are out of adjustment then the vacuum from the head might be low and not allowing the fuel pump to work right.

Are you sure the plug is bone dry?

Clean the carb and make sure all the passages are very clean and that you can blow air thru fuel port. Also make sure with this carb that your needle below the float seals well. while the carb is inverted blow thru the fuel line and make sure you are not getting any air past the needle seat.


Rob
Click to expand...
I just checked the plug again, and it is a little wet, so there is fuel getting into the engine. Now, I will completely clean the fuel system and make sure there is no old fuel in the system.


#22

T

taxidermist

If its getting wet I bet its old fuel that is not firing. I also bet its the valves need lashing too.


Rob


#23

J

jakesmurray

This engine finally runs!!! It turns out that the main jet was clogged. When I cleaned the carb the first time, I didn't unclog the main jet. I put the hose up into the hole, and some black crud came out of the jet. Now, the engines fires right up and runs very strong! It even idles very well, with no adjustments. Thanks to everyone for their help!


#24

C

crazyoldtractor

make sure the needle that the float pushes on moves freely.


#25

J

jakesmurray

crazyoldtractor said:
make sure the needle that the float pushes on moves freely.
Click to expand...

Yes it does, now that it is clean. Thanks


#26

B

benski

Super! Unlike my dearly departed 454 Chev big block, these small engines can get REALLY picky about their foraging habits. It's enough to drive ya' crazy!:confused2::eek::biggrin:


#27

F

fido

mumptia said:
Checking lash is a bit to type out.

I have a pdf service manual for this engine and I'll e-mail it to you if you like. (the file is too big to add as an attachment on this post I guess :frown:

Hope it helps. (end of section 6)

You might need some specialty tools (pending your experience level) but its not too tough a job.

Good luck:thumbsup:

All I need is your e-mail address.
Click to expand...
jameslangdon3@yahoo.com is my email . would greatly appreciate the service manual


#28

T

Turkdc

Hey all! I have an idiot question for you guys... I have the same Kawa engine on my mower. I disassembled my carb, and I'm not sure which way the float goes back in... It seems to go in either side up! Any suggestions?


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