Question about Briggs 10hp stratton Engine Generator Taper Intek I/c Std Tapered 205412-0130-m

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Valve clearance adjustment

Popping thru carb ,plug getting black

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I have a johndeer 420 and it keeps spitting gas out of the carb, i put new carb on it new points and condencer on it . cant keep it running what would be going on?

wont be the carb
if you are sure the carb and pipes ,linkages choke and float etc are correct

could be the inlet exhaust valve clearances
not sucking in the fuel to the combustion chamber


Apr 29, 2017 | Garden

2 Answers

96 Honda Civic making a popping noise when I release the clutch and third gear

Reasons for popping noise:
Popping noise could occur due to the malfunction in the ignition system, leaky valves, weak cylinder compression, carbon accumulation in the combustion chamber or lean fuel.
1. Ignition system malfunction (Misfire).
- The ignition timing.
- Spark plug gaps.
- Use colder type spark plugs.
- Ignition module and ignition coil.
- Distributor cap and rotor.
- Spark plug high tension cords.
2. Cylinder compression:
- Check valves clearance.
- Perform cylinder compression test.
3. Fuel system (For lean state).
- Check fuel filter for clogged.
- Check fuel injectors.
- Check fuel pump pressure.
- Check fuel regulator.

May 04, 2015 | 1996 Honda Civic

1 Answer

Econ Quad Viper 70 4 stroke won't stay running unless choke is one quarter or more closed. Occasionally pops through carb and bogs down if accelerated.

Sounds like you need a valve adjustment, if it is popping thru the carb, the intake valve is open at the wrong time, this can be caused by three things, too much gas, timing is wrong (stretched chain) or valves too tight not allowing valve to close. I would adjust valves first.

Dec 21, 2014 | ATVs

1 Answer

Can't start my yz250fp dirt bike

Have a trained tech service and properly jet the carb and set idle and idle mixture.
If you have spark, compression, and the valves are adjusted properly the only thing left is the carb. The FCR carb is as complex as the entire engine!

Apr 04, 2014 | 2003 Yamaha YZ 250 F

1 Answer

48" Husqvarna : ran ok last run, now will not start. changed oil and filter, fuel and filter, plugs, air filters, checked safety plugs, and charged battery. now it pops back thru carb.

This can be attributed to numerous issues, popping through the carb can indicate timing issues, valves out of adjustment, or a number of other things. Bad gas in the carb could also be a part of it, did you replace the fuel filter? Also, make sure you set the gap on your plug correctly and that you replaced the plug with the correct replacement plug.

Sep 30, 2013 | Husqvarna Garden

1 Answer

My 1999 polaris sportsman 500 Is popping back thru the carb when accelerating. I had cleaned the carb set the float checked the sir box and filter. Changed the fuel filter and plug nothing changes. It...

I would check the valve clearance settings as it sounds like a inlet valve is being held partially open when it revs.. Check also for broken valve spring

Jul 20, 2013 | Garden

2 Answers

Honda CB250 will not start. It will turn over and there is fire on the plugs and when I look at the plugs after trying, they are "wet" with fuel. What am I missing?

Valve clearance or camshaft timing. If you have no clearance on the intake valves at top dead center, then you will have no compression = no start.

Nov 29, 2010 | 1994 Honda CB 250 Nighthawk

3 Answers

Craftsman lawn tractor 917.271060w/kohler 15.5 hp engine cranks but backfires thru carb and wont start.

my 15 hp kohler engine backfired while i was using it, now it wont crank and backfires thru carb

Oct 10, 2010 | Craftsman Garden

1 Answer

Popping thru carb, checked timing its ok,the push rods on three rocker arm hardley move one opens good, problem started all of a sudden.

INtake valve adjustment needed. at least on one cylinder. maybe both sides. while your in there adjust all. must have some clearance. .004 on intake .006 on exhust.

Sep 25, 2010 | Briggs & Stratton Briggs Stratton Intek V...

1 Answer

How do I re-jet my carbs?

Basic setting for idle adjustments is ~1-1/2 to 2 turns CCW from CW stop. New stock (paper) air filters don't require re-jetting--only K&N foam replacements require one size bigger main jet. Adjust each carburetor idle screw for smoothest idle. Each screw should be about the same adjustment--if one is non-responsive, that carburetor may need internal cleaning. Make sure you have good spark plugs and the ignition points are clean and set to proper clearance. The ignition coils on these old Honda's were typically weak--try to find a modern replacement. The carburetor slide needles should have the 'C' clips in the center groove. Make sure the retainers are down tight. Check the engine valve clearances (about 0.003 " cold) for both valves when the crankshaft is set for TDC when that cylinder is coming up on compression.

Aug 11, 2009 | 1974 Honda CB 200

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