Need help with JD GT25 - Won't Start!!

14 years ago

I have a great JD GT275 that has been bulletproof for 12 years now. Last week, I tried to start it up and no dice. I put some gas down the air intake and it started right up, for 10 seconds or so. So I figured it's probably a fuel starvation issue.

Today I drained all the gas out, replaced the gas filter, put fresh gas in, pulled the air cleaner and carb bowl and sprayed Seafoam Carb Cleaner in all the carb nooks/crannies. I let it sit a few and then I blew out as many areas as I could reach with canned/compressed air. The carb was very clean to begin with. Lastly, I pulled the fuel line leading to the carb at the fuel pump and put some Seafoam in the line and reattached to the fuel pump. I put everything back together and cranked it.

It cranks well but it didn't run. I noticed that no gas was getting up into the new gas filter! So I pulled the fuel line leading to the carb again (at the fuel pump) and cranked it a little. Gas came up in the filter and the pump spit out some gas as it should. So, it's been held back by some stoppage downstream towards the carb.

So it appears that I've narrowed it down to the intake of gas into the carb. Maybe clogged jets that did not respond to the Seafoam cleaning??

Here's the problem, I don't see the bolts that hold the carb onto the engine and I suspect that I might have to tear-down the engine cowling to get at them. Not sure if I am up for this and flying blind.

- Is anyone here familiar with this 17 HP Kawasaki engine that can let me know how to pull this carb? Or where I can find instructions on how to do it?

- Could I simply pull the pin on the carb float (with carb attached to the engine) and drop the jet(s) down from there for cleaning?

Thanks!

-bk

Sort by:Oldest

Comments (9)

rcmoser
14 years ago
I would try this first, prime with carb. cleaner it to get it to fire off, then I would keep squirting small burst of carb. cleaner into the carb to keep it running, have the throttle at least half way up or full up. It just may start taking fuel on it own if you give it enough run time to start pulling fuel up. This don't cost you nothing but time and don't hurt the engine IMO.
tomplum
14 years ago
Rc's suggestion is a good one. ALso, catch some of the fuel that comes out of the line inna small pan to see that there is no water. In answer to the carb question, you remove the air filter box screws- 2 at the carb and 2 that go in at an angle closer to the bottom. You would want to verify that the solenoid at the bottom is working, a click should be heard when it is activated by the switch. I think the bowl can come off whilst the carb is mounted.You maybe able to clean the bowl, flush the line through the carb and shoot jet spray up into the stem as that is where the main nozzle is.By rights,unscrew the jet, above that the nozzle comes out. Yours is a single barrel correct? Two barrel carbs one has to be a bit more careful with jet placement etc. Plus they carry a more complex price too...

Here is a link that might be useful: deere parts
Related Discussions
need help...husqvarna 350 won't start
Q
Comments (27)
I really like the 350, I have two of them. Versatile little saws. What you describe is what people tell me happens to them when I let them borrow the saws without supervision. They are VERY touchy saws and easy to flood. But it sounds like a perfectly working saw since it's cutting well after starting. It could just be a starting procedure problem. Try this; 1. If the saw is warm (you shut it off less than 10 minutes ago) then just press up on the red kill switch and start it. 2. If it's been off for only 20 minutes or so, pull out the blue choke lever and push it back in. Don't touch the trigger. This will leave it in fast idle; start it and let it run on fast idle for 5-10 seconds. 3. On a COLD SAW (this sounds like your problem): a) pull out blue choke b) unlock the chain brake (saw on ground, hold it with your foot on the handgrip) c) press the fuel bulb about 5 times (more doesn't hurt, it just circulates) d) pull the recoil till it "stumbles": IT WILL NOT START and DO NOT PULL AGAIN after this. It will only do this stumble one time. If it's winter (32F) it may run 1-2 seconds and die. DON'T PULL THE RECOIL AGAIN. This is very important. Even one pull extra will flood it as you describe. e) Push in the blue choke and do not touch the trigger. If you touch the trigger it turns off the 'high idle'. f) Pull the recoil and start it. It should not take more than 5 pulls. DON'T touch the trigger even after it starts. g) Let it run on high idle with the chain spinning for 5-10 seconds. h) Now you can pull the trigger and use it normally. Steps (d) and (g) sound like the missing steps in your starting sequence. You shouldn't need to monkey around with the sparkplug to start it. It's touchy I know, but if you get used to it you will probably like the 350, it's a great saw.
...See More
JD 425 won't run
Q
Comments (4)
Probably the Time Delay Control, it fails and makes it seem like a coil failure. The TDC can be tossed, it helps with after fire. I have not had that problem with these engines in our area and gas. If the spark fails then I would remove the TDC first, it will require some minor rewiring close to the starter, since thats where its wired in, a little black box on the radiator frame with many wires going to it.
...See More
Husqvarna Won't Start - Suggestions Needed
Q
Comments (8)
YES- The solenoid has a plunger (needle) that sticks into the Main Jet to block fuel flow. The idea being that when you turn off the key, fuel is shut off and the remaining fuel vapors are "purged" as the engine slows down. Removing these vapors means there is no fuel to ignite in the muffler (or hot carbon deposits etc. inside the engine) to backfire. Without the solenoid, fuel/air keeps flowing through the engine while the engine is slowing down after shut off. With the solenoid, just air pumps through. That's why your owners manual probably tells you to shut the engine off at higher speed. It purges any remaining gasoline fumes.
...See More
J/D RX75 Won't Start!!!!!
Q
Comments (14)
IF you were getting a lot of black smoke, it was probably flooding out. When you cleaned the carb, did you flush the fuel line. Often when disconnecting the fuel line, you'll break loose some crud, which immediately gets flushed down to the carb needle & seat, causing the same problem. IS the carb float damaged, so that it has suffered a loss of buoyancy? (I don't know how those are constructed, so that might not even be possible Did you flush the opposite direction of fuel flow, so if a piece of crud in the needle & seat was the problem, it'd get flushed back out the fuel inlet? You might take a vise grip pliers & rag and clamp off the fuel line. Start the engine and see if iy will run good at some point before the carb runs out of gas. THAT would indicate a flooding problem.
...See More
billyk72
Original Author
14 years ago
Thanks for the quick responses!

I tried RC's suggestion - no dice, but thanks for the idea!

Tom thanks for the heads-up on the carb attachment. I will look further into the location of the bolts.

Any other information would be greatly appreciated.
tomplum
14 years ago
If you feel it is best to remove the carb- you may have to extract the studs. if you need to lock the 2 nuts together and twist it out. Watch how carb spacer/ gaskets go etc.
billyk72
Original Author
14 years ago
Tom,
Pardon my ignorance, but I am not clear on your points.

It does look like pulling the carb is the next step, as I tried "running" the engine by providing a constant flow of gas into the air cleaner and it runs OK that way. But it did not end up sucking through any gas on it's own.

Regarding carb removal, it looks like the carb is simply mounted the same studs that secure the air filter assembly, and it may actually be held in place by tightening down the air filter assembly against the carb - at least that's what it looks like - I don't see other nuts that are holding the carb body to the engine. I tried pulling gently on the carb to see if it would simply slide out a bit on those studs, but no dice. And I didn't want to really yank on the carb.

Sounds like you are saying that the studs need to be removed? Do you know if the carb will slide off those studs with a little more "pull"?

Again, any help is greatly appreciated. It will be frustrating to have everything cleaned up so nicely, only to have to bring it to the shop (and pay big bucks!) for merely cleaning the jets.
tomplum
14 years ago
It is basically a choice on how to un-hook the linkage. I find on some of these it is easiest to extract the studs. The 2 nuts that retain the airbox- use those and lock them together and twist the stud out- noting which end went into the block.
yosemitebill
14 years ago
Before going too far I think I would, as Tom mentioned above, check the fuel shutoff solenoid on the bottom of the float bowl... would cause exactly what you're describing. Can you hear it clicking? If not, is there voltage on the connector going to it?
billyk72
Original Author
14 years ago
Well, thanks to everyone for their excellent assistance, but I can't get this thing started. Today I checked the fuel cut-off solenoid and it's fine. Still no start.

The shortage of technical information on the net and from JD on exactly how to remove and service the carb leads me to simply give it to the local shop for repair. Can't say I didn't give it a try!

Thanks again!
mjmarco
14 years ago
check that fuel filter you put on. I would by pass it for now to see if it could be the problem. They did have problems with replacement filters. And also make sure you are full of oil.
md

Need help with JD GT25 - Won't Start!!

Comments (9)

rcmoser

tomplum

Related Discussions

billyk72
Original Author

tomplum

billyk72
Original Author

tomplum

yosemitebill

billyk72
Original Author

mjmarco

COMPANY

BUSINESS SERVICES

GET HELP

CONNECT WITH US

Need help with JD GT25 - Won't Start!!

Comments (9)

rcmoser

tomplum

Related Discussions

billyk72Original Author

tomplum

billyk72Original Author

tomplum

yosemitebill

billyk72Original Author

mjmarco

COMPANY

BUSINESS SERVICES

GET HELP

CONNECT WITH US

billyk72
Original Author

billyk72
Original Author

billyk72
Original Author