I have a customers Briggs & Stratton Intek Pro 305 10 HP engine that is fitted to a pressure washer that has been hard to start since new.

The engine details are as follows:

Model: 205332
Type: 0314B1
Code: 090107YD

It was purchased new in 2009 and has only done 33.4 hours since it was purchased, so hasn't done much work.

When I try to start it with a known working spark plug, it has good compression but has no 'kick' even though the inline spark tester shows a spark whilst under compression. It also makes no difference using Aerostart. After a few dozen swift pulls it will kick back and snatch the starter rope out of your hand but still won't start. Occasionally it will start in under six pulls but is even worse if you try to restart it when it is warm.

I've tried removing the pressure washer pump incase it was causing a drag but it makes no difference.

I also checked the valve clearances which were a long way off the factory spec but hardly made a difference.

This seems to point to a decompression problem as once it runs it doesn't run rough as though the ignition timing was out of spec.

Of course it is now out of warranty, so my options are to pull it apart to see what is wrong, putting an electric starter on, or just replacing it with a rebuilt Mitsubishi made Vanguard engine.

Has anyone had trouble with model Briggs & Stratton engine before?