The most common causes Paul sees on petrol strimmers that won't start are five: stale fuel, a fouled spark plug, a perished primer bulb, a blocked air filter, or a flooded engine from over-priming. Paul fixes the same five problems all season long at the Hyde workshop — and most can be tackled at home in under thirty minutes with basic tools.
A petrol strimmer that won't start is one of the most common problems Paul sees at the workshop. The good news is that most causes are simple and often fixable at home with basic tools.
Here are the five most common reasons, in order of how often Paul encounters them.
If DIY does not get it running, Paul does strimmer repairs near me from the Hyde workshop. Most jobs same day or within 48 hours. Call 07342 239878.
1. Stale Fuel (The Number One Cause)
If your strimmer has been sitting for more than a few weeks with fuel in it, this is almost certainly the problem. Petrol degrades quickly in small engines — the lighter compounds evaporate, leaving behind a varnish that blocks the tiny jets in the carburettor.
Fix it yourself: - Drain all old fuel from the tank - Remove the fuel filter (usually inside the tank on the end of the fuel line) and check it's not blocked - Refill with fresh fuel mixed at the correct ratio (usually 50:1 or 40:1 — check the manual) - Pull the cord 10-15 times with the choke on
Paul's tip: "Two-stroke fuel goes off even faster than straight petrol because the oil separates. If the fuel smells like varnish instead of petrol, it's gone. Don't even try to run it."
