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I have been given a honda mower i had to put a new pull start on it & new plug but wont start what can it be

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Make sure you are getting spark by removing the sparkplug and put the wire on it and ground the plug to the engine block. Pull the cord and you should see a spark between the gap of the plug. If you are getting spark the carburetor could be dirty causing the engine to starve for fuel that has to be clean and make sure the engine has enough compression which you can check with a compression gauge should be 90 or more PSI.

Posted on Mar 18, 2011

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Hi, W/D here.

First, make sure that the handle that has to be up to start is up. This is the one at the upper end of the push handle. You lift this handle up to where your hands are placed and then pull the start cord. (Excuse my being very basic here; I don't know how much you know about these things. It's not my intention to insult you).
If this is not the problem, remove the spark plug and reconnect the coil wire to the plug. Orient the plug where you can see the electrode with the outer metal part of the spark plug grounded to the frame or motor. When you pull the starter, you should be able to see the plug spark. If you see a spark, that's good. If no spark, you will need to check back under the cowling. Make sure that the connections where wires connect to terminals are shiny and bright. Clean each one individually. If the coil is the type that rides very close to the flywheel, make sure that the flywheel is free of rust.
If you have spark (that's good!), you'll need to check the fuel system. Make sure that you have clean, fresh fuel in the tank. Some mowers have a fuel petcock between the tank and carburetor, so look for anything in the fuel delivery line that might be an obstruction, The fuel filter may be plugged. If you pull it to clean or replace it, use a phillips head screwdriver to plug the fuel line, or catch your fuel into a container. Look for a priming bulb. If you have one, look near it for how many times it should be depressed before starting the mower. If no instructions are found, press the bulb in between 3 and 6 times, and try to start. Depending on how long the mower has sat, there may be gum deposits in the carburetor. Remove the air cleaner, and give the ait inlet a small shot of starting fluid, and attempt to crank it. If the mower will run briefly, and you had fuel up to the carburetor, try spraying the inlet to the carburetor with carburetor cleaner, waiting a while, and dosing it again. The intention is to remove the gum deposits. Respray with the starting fluid and attempt. If tha mower attempts to start, check, clean and replace the air cleaner after giving the carburetor one more shot of starting fluid.
If there is no spark, and all connections have been checked and cleaned you will need to test the electrical components.
Hope that this helps to get you running!
Best regards, --W/D--

Posted on Mar 18, 2011

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Before you do anything, check for spark. This can be done by removing the spark plug boot from the spark plug and inserting a piece of round conductive metal into the boot, such as a screwdriver, etc. Make sure it makes contact with the coil wire in the boot. Have a second person hold the screwdriver near a metal part of the engine, but make sure there is no spilled fuel in the area. Your helper should also be wearing rubber gloves or such to insulate him from a shock. If there is a strong spark, take the following steps. Drain the old fuel out of the tank. (Fuel goes bad in 30 - 60 days after being purchased unless a fuel stabilizer was added at the time of purchase. Fuel stabilizer will NOT restore bad fuel.) Make sure you drain the carburetor bowl as well. Change the fuel filter (if applicable) and install a brand new plug. The new plug you just put in will be saturated with bad fuel. Honda carburetors are known for being very reliable, seldom needing a rebuild. If you are unable to do, or uncomfortable with any of these procedures, I suggest taking your mower to a small engine repair shop.

Posted on Mar 18, 2011

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