Honda gxv390
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Honda gxv390
13 hp pull start motor. I can pull this with the choke on til I’m blue in the face, no start. Give it a shot of starting fluid, it fires right up, take the choke off and it runs great. I’m sure it’s a dirty carb, but does it hurt anything to use starter fluid?
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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Re: Honda gxv390
I would guess that your choke isn't closing all the way if it is running good once it gets going. Do you have the ability to partially disassemble the air intake side enough so that you can seal your hand over the intake of the carb to choke it and see if that works? You could inspect the operation of the choke at that time too.
I've used starting fluid only in limited occasions. If you have to use if every time, it's worth digging deeper to solve the underlying problem. That said, there probably isn't any concern with using starting fluid. As an alternative, you can put some gas in a small spray bottle (of a variety that won't decompose from the gas) and use that instead. It's much cheaper! As always, beware using either starting fluid or a spray of gas as any residual bit that doesn't make it in the carb can ignite if the engine backfires or if you have a stray spark.
I've used starting fluid only in limited occasions. If you have to use if every time, it's worth digging deeper to solve the underlying problem. That said, there probably isn't any concern with using starting fluid. As an alternative, you can put some gas in a small spray bottle (of a variety that won't decompose from the gas) and use that instead. It's much cheaper! As always, beware using either starting fluid or a spray of gas as any residual bit that doesn't make it in the carb can ignite if the engine backfires or if you have a stray spark.
Jim


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Re: Honda gxv390
I found some information at this link: https://www.outdoorking.com/forum/ubbthreads.php?ubb=showflat&Number=36768
Reading down through it, some people replace the choke spring with a weaker one to resolve this problem. You'll want to pull your air cleaner off to look at the choke operation and see if this is causing your problem.
Reading down through it, some people replace the choke spring with a weaker one to resolve this problem. You'll want to pull your air cleaner off to look at the choke operation and see if this is causing your problem.
Jim


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Re: Honda gxv390
Don't overlook the possibility of the carburetor bolts being loose, that will give the same symptoms
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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Re: Honda gxv390
Jim, I read the link you sent and the choke does close and seems to be working. It doesn’t want to idle, so could the idle circuit be plugged?
John, the carb bolts are tight
John, the carb bolts are tight
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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1958 International Cub LoBoy
1948 Farmall Cub
1977 International LoBoy 184
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1946 Farmall B
1953 Willys CJ3B
Cub-193 Moldboard Plow
Cub-54A Leveling and Grader Blade
Cub Loboy L-54 Leveling and Grader Blade
Unknown 5' Single Gang Disc Harrow - Circle of Safety: Y
- Location: Manchester, MI
Re: Honda gxv390
Ahh, if it won't idle, then you need to clean or rebuild the carburetor.
I have in a few instances 'cleaned' a carburetor without taking anything apart. I drain the fuel bowl, then fill the fuel bowl (through the fuel line) with carburetor cleaner. Full choke and crank it over to the point of flooding. Walk away for an hour, then reattach fuel line and try to start it.
I have in a few instances 'cleaned' a carburetor without taking anything apart. I drain the fuel bowl, then fill the fuel bowl (through the fuel line) with carburetor cleaner. Full choke and crank it over to the point of flooding. Walk away for an hour, then reattach fuel line and try to start it.
Jim


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Re: Honda gxv390
Yes that might work if it’s gummed up.
Would the idle stop it from starting?
Would the idle stop it from starting?
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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- 5+ Years
- Posts: 2310
- Joined: Sat Sep 07, 2013 3:45 pm
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1958 International Cub LoBoy
1948 Farmall Cub
1977 International LoBoy 184
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Cub-193 Moldboard Plow
Cub-54A Leveling and Grader Blade
Cub Loboy L-54 Leveling and Grader Blade
Unknown 5' Single Gang Disc Harrow - Circle of Safety: Y
- Location: Manchester, MI
Re: Honda gxv390
john2189 wrote:Would the idle stop it from starting?
It depends on the carburetor design, but generally no. The idle fuel circuit is separate from the high speed fuel circuit. I'm not familiar with that engine or the particular carburetor design. Maybe somebody more knowledgeable will chime in.
Jim


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Re: Honda gxv390
I’m not familiar with that carburetor, either. But, you can do some degree of cleaning, while the engine is running, with Deep Creep. It’s basically Seafoam in a spray can. Follow the label instructions.
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Re: Honda gxv390
Ok thanks
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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Re: Honda gxv390
I have also seen this with engines that have very low compression. You don't get enough air drawn through the carburetor to lift fuel from the carburetor when cranking (or pulling). Once you get it spinning fast on the ether it draws enough to get fuel.
1944 Farmall H
1948 Farmall Cub
1994 Speedex 1631
1948 Farmall Cub
1994 Speedex 1631
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- 10+ Years
- Posts: 1665
- Joined: Thu Oct 26, 2006 7:17 pm
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Re: Honda gxv390
Seems to have good compression, it is rope start
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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Re: Honda gxv390
You could check the valve clearance. I had a B&S engine once that the valve clearance was next to nothing and would not let the valves seat. Adjusted the clearance and solved the starting problem.
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- 10+ Years
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Re: Honda gxv390
I will check the valves. Easy to do
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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- 10+ Years
- Posts: 1665
- Joined: Thu Oct 26, 2006 7:17 pm
- Zip Code: 44657
- Circle of Safety: Y
- Location: Minerva,Ohio
Re: Honda gxv390
Checked the valves. They were good
'49 Cub (Vince)
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
'41 allis B
656 Wheel Horse with 42” sickle mower
C-165 Wheel Horse
Simplicity 20 HP Sunstar
Honda 48” walk behind mower
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