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Mower engine starting

andym's Avatar
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07-20-03, 02:53 PM   #1  
Mower engine starting

In Ireland. Husqvarna mower. B & S engine. 4 hp. I will kill it or it will kill me. Starts and then dies. Searched the site and tried the basics. Ignition - I'm not sure. When I take out the spark plug and pull the cord I only get the odd spark - is this normal or should there be a lot of activity. New spark plug got no greater activity.

There are light oil deposits inside the head under the spark plug opening.

Looking for direction before I take off the head and make a real mess.


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07-20-03, 05:30 PM   #2  
Hello Andy. Welcome to our Do-It-Yourself Web Site and our Small Engine forum.

Some of the possibilities for engine starting & dying problems:

Check for constant electrical continuity through all switches and safety devices. The ignition switch may be faulty as could any other electrical connection. Check all wire terminals for rust, corrosion and looseness.

Another possible problem could be a restricted exhaust system and or muffler. Check the air filter. Clean or replace if needed. Check the fuel filter. This filter may be inside the tank or inline.

There may not be a steady and or full volume flow of fuel into the carb. Remove the fuel line hose at the carb and allow fuel to flow out for about 1/2 to 1 minute.

The flow rate and volume must remain constant. If there is any slow down in the rate during this time, remove the fuel tanks cap and note any difference.

If the flow rate continues to remain slow or stops, there is a restriction in the tank, fuel line or the vent hole in the fuel cap is plugged and or restricted. Removal of the cap will allow full flow to return to full flow.

Based on the problem description it appears to be a fuel related problem. Fuel not getting into the carb or flowing to the carb from the fuel tank.

Most likely I haven't covered all of the possibilities. The other resident small engine service and repair professionals may be able to offer additional suggestions, advice & help.

Check back on your question several times over the next few days for additional replies.

Small engine repair parts, generic repair manuals and additional help are all available at all local small engine repair shops and or lawn mower repair shops in your area. Shops and dealers are listed in the phone book directory.

Read the already asked questions and the replies offered in them on this same type of engine starting and running problem for additional help & information. Doing so will provide additional possible causes and the solutions to correct them.

If you need further assistance, use the REPLY button. Using the reply button moves the topic back up to the top of the daily topic list automatically & keeps all communications in this one thread.

Regards & Good Luck.
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cheese's Avatar
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07-20-03, 06:50 PM   #3  
Try pumping the primer bulb when it starts to die. If it makes it run another second or two, then you need to replace the carburetor diaphragm.

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07-20-03, 07:13 PM   #4  
Wow, it never ceases to amaze me how far the internet can reach and folks from all over the world who read our forum .

Try squirting a little fuel into the spark plug hole. If it fires up and runs for a few seconds and quits, most likey a fuel problem.

I'd agree with Cheese, sounds like a fuel problem.

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