I have kf150d -sx auger engine weak yellow spark

Any combustion engine needs 3 things to run...Spark, Fuel, and compression. You need to figure out what you are missing. Easiest thing to check is spark. Pull the spark plug and hold the metal base against metal engine casing, and making sure you are holding onto the insulating rubber of the boot, have someone help crank the engine over while you hold the plug there. Look for a good strong blue to white spark at the plug gap. If you have no spark or weak yellow to orange spark you will need to look into the ignition system. New plug is the cheapest and easiest thing to change and test again. If it is still a weak spark then you will need to look to the coil/ ht lead, igniter box, or pick-up. While the plug is out, you can check for compression in the cylinder. If you end up having good spark and good compression then you look to the fuel system. If you can't find a problem with your fuel system, your fuel, spark, and compression also have to happen at the correct time....so you check your timing marks. Simple steps of engine trouble shooting.

also check whether the distributor is proper or not.

An engine needs air, fuel, fire, timing and compression. What kind of car is this? You may have spark, but if it is a weak spark, it may not be able to ignite the incoming fuel. If your compression on all cylinders is not more than 100 PSI, you will not start. Good luck.

Misfires are caused by one of 3 things-gas, spark, or compression-one of those is the problem. For gas, check the fuel pressure and see if it is at the right pressure for your car. Low fuel pressure will cause misfires. If pressure is good, it could still be an injector problem, like a clogged injector. If low pressure, suspect the fuel pump or the fuel filter.
For an ignition spark problem, check your spark plugs. Pull them out and inspect them for broken or cracked plugs, check the spark plug gap, check for oil fouled plugs. You may be able to isolate the misfire to a cylinder or two by the plugs condition. A misfiring plug or cylinder should show more black, sooty deposits than the other plugs. A normal firing plug will have a tan or brown colored insulator on the end with very little deposits. If the plugs are okay, clean them a bit if needed, and check for spark on the spark plug wire ends with engine cranking. Buy an inexpensive spark tester, or hold each spark plug wire metal end terminal 1/4 inch from a ground on the engine block, while cranking the engine. Wear a heavy glove to avoid getting shocked. Check that every cylinder is getting a strong blue spark to eliminate ignition as a problem. A weak, yellow or orange spark is an ignition problem, possibly a bad coil, or other ignition part.

If spark and gas is good, you may need to check engine compression. Any cylinder that has significantly lower compression than the other cylinders will cause a misfire, and set a misfire code. You should check for any trouble codes in the engine computer. A code reader or scanner would have to be connected to the diagnostic connector under the dash. What is "significantly lower" compression? About 15-20% less compression. Say you checked and had 150 psi compression in most cylinders. If one had 20% lower compression ( 150 X 20%= 30 psi, 150 -30 =120 psi, or same as saying 150 X 80%= 120 psi.), a condition like that can cause a misfire. I hope I have made sense here. Good luck, and post back what you find, or if any questions.

surely you know your starters normal sound, no?

.25 means 250 rpm (dial .25x 1000 = 250)
Most cars do near 300, but gee, in alaska its less and starts. so....
there are vast reasons for non starts.
from water in a cylinder
to weak battery.
weak spark
bad fueling (excess or not enough)
to never doing a tune up ever, that you?
This car has OBD2, if a scan tool is attached, you can
check to see if water temp, is the same as outdoors, on first start.
if the temp shows, say -20F at 70F outdoors, the ECT is bad.
this would cause flooding.
what can you do, plenty of willing to own tools, are you. or do you like to guess?
compression good.
battery good, try a barrowed good battery that measure 12.6vdc rested.
put in new spark plugs, using under hood sticker stated gaps.
does the car start good on test fuel? with the fuel pump relay pulled.
yes, then motor and spark is good, and fueling is bad.
(too much or too little) ill stop here, but you can see where im going.

getting gas may be the fuel pump it weak and you are not getting the gas you need to the motor

Hi

It sounds like a timing issue if you are getting fuel, spark and air then I would look at that first. is the crank shaft sensor good?
Regards

Dan

There can be several causes for low compression.
Chck the obvious first. the spark plugs must be checked that they are all in good condition. not burnt, the gap must be good( for your engine).Check the wires and coil so that good spark is obtained. Blue spark , not weak yellow spark. After everything is good. Check the cylinders to see if they have compression. To test the cylinders do the procedures shown below.

If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

compression test will help you determine if the oil is getting past the valve guides or the rings. If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

finally if the rings on one or more of the pistons can caus compression leak. It must be located and fixed.

You will have to pull a spark plug out to check that you have spark when cranking the engine,while you have the plug/s out do a compression test to determine health of engine and wether it is in fact giving compression,eliminates other potential faults if compression is good.If you have compression(around 140 ish)and introduced fuel and it wont fire up it only leaves electrics as the fault.3 major engine requirements to run Fuel,Compression,ignition.When checking spark at night is best as you can easily see wether you have the correct type of spark,Blue and if its quite you will hear the spark as well.Your fault is consistant with ignition module,coil or lack of power to ignition.Faulty modules will give a spark but its too weak to ignite fuel and the spark will be yellow in color.Let me know how it goes.Good luck

All fords were notorious for starting at one bit but on the Cortina
that I had one winter I had to remove Two spark plugs from 1 and 3 cylinder , take them in the house warm them up on the gas ring then on return to the car pour in a half spoonful of petrol to the "pots" then refit the hot plugs then after 3 swings she would go. The only other solution was to put the car in a nice warm
garage.!!