Honda mower will not start. Replaced spark plug without results.

SOURCE: oil around spark plugs on 1992 honda accord

Yes the oil can cause the car to lose spark, the oil leak could be caused by the valve cover gaskets around the spark openings, but 9 times out of 10 it is the spark plug tube "O" rings. The top of the valve train comes off of the head, the "O" rings are between the two halves, that will fix the oil leak.

SOURCE: lawn mower ony runs at idle and dies after seconds

try holding the throttle open

SOURCE: no spark from spark plug in honda lawn mower

the pionts could be bad try changing them

Jta91

• 99 Answers
• Posted on Jan 28, 2010

SOURCE: INTERMITTENT SPARK

Make sure the spark plugs are not platinum or anything other than regular copper plugs. The S-series uses a "waste spark" system and will destroy platinum plugs. Regular copper NGKs that came from the factory with the car work the best.

How do you know it is a spark problem? Are you able to verify spark, fuel and compression?

I ask because the usual solution to what you are describing in your problem is replacing the Engine Coolant Temperature Sensor (ECTS). The factory one is plastic and cracks. When it cracks it sends the PCM a signal that the engine is 40F below zero. The PCM will compensate by dumping A LOT of fuel into the engine to try and warm it up. It will cause all kinds of starting and idling problems.

Autozone or the dealer sells the better brass tipped one. The ECTS is located just under and behind the upper radiator hose. You'll need to remove the air intake tubing to see it or get to it. It has two wires going to it and goes into a connector. Squeeze the connector at the "ears" and it will come off.

Now is the time to check the connector for corrosion and gunk. If there is clean it out very well. If there is no gunk or corrosion continue on.

A 10MM DEEP well socket will take it out. Swap it quickly because some coolant will come out (a couple of ounces). Hand tighten it and snug it with the socket (not too much because it will strip out). Connector back on (either direction it's non polar). Put the intake back on and enjoy better starting and idling.

SOURCE: mower won't start spark plug turns black

Black carbon fouling on the plug is a sign of the engine running too rich, start by replacing the air filter and plug and try again.