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Old 08-29-2010, 08:13 PM
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virginian virginian is offline
Motorized Bicycle Elite Member
Join Date: Dec 2009
Location: McLean VA
Posts: 117
Default Spark plug failure question

I started to have trouble stating my engine. It is a Tanaka 32 with 2500 miles, and it would usually start on the first try. But several times in a row it took many tries and then did not start at all,

I replaced the spark plug and it then started just fine. Should a spark plug fail after only 2500 miles?

Its appearance was a light brown/rust like color. No oil on it.

However, with the new plug I lost 2 mph in speed and the engine was louder. Is that normal?

After about 200 miles, I have regained 1 mph and the engine has quieted down. Is that normal for breaking in a new plug?
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