DIYbanter - View Single Post - Lawn mower poor start. Spark plug new, old one works good.

wrote:
"lbbss" wrote:

I have a 6hp lawn mower (2 year old) that is very difficult to start in
spring and fall, even in the summer it takes 6 tries to start (and 2
times priming it). If I switch spark plugs with my old lawn mower it
works great. I checked the gap is the same. The plug looks clean,
but I sand it down just to make sure no carbon left on it. Any ideas?
Thanks

Replace the mower. Most sparkplugs are now lifetime sparkplugs, and
if the sparkplug doesn't work, your mower has reached the limit of its
lifetime...

Lawn mowers don't typically use the long life platinum or iridium plugs
that modern cars use. Why bother when there are sub $2 replacments
out there?

I might be frugal, but I'm not going to dick around with a $2.00
sparkplug that has no user serviceable parts inside. I'd sport for a
new one.

Well - the gap is user serviceable. Other than that, scraping off
the oxide layer wouldn't seem to be terribly useful. It'll just grow
back as soon as the mower is started.