ThaiFarang
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- Joined
- Feb 12, 2012
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I am in dire need of help to diagnose the engine problem of my MTD/B&S push mower. Any help will be much appreciated as here in Thailand knowledgeable repairers are hard to find.
The machine is a 3.5 hp, 20 inch, push mower with B&S engine.There are some 9 data items stamped on the mower, but as far as I can tell the B&S codes are : model# 98002; type # 1607B1; code # 00042855.
It has never been a smooth runner, but was ok until recently when a Thai "helper" ran it with no oil, resulting in a broken con-rod. This was repaired by local motorcycle mechanics. Then because it died completely another repairer serviced the carburetor and installed a new diaphragm. It appeared to run ok.
But at first use after the service, and ever since, it dies repeatedly (after running for about 15 minutes) and the spark plug is black. Cleaning the plug gives another 15 minutes of use, then it dies again. This happens repeatedly.
I am not a mechanic, and I am at a loss. I have a fear that the valve or ignition timing may be incorrect (after the con-rod repair), but really I have little clue as to what is wrong.
Please can someone offer knowledgeable advice?
ThaiFarang.
The machine is a 3.5 hp, 20 inch, push mower with B&S engine.There are some 9 data items stamped on the mower, but as far as I can tell the B&S codes are : model# 98002; type # 1607B1; code # 00042855.
It has never been a smooth runner, but was ok until recently when a Thai "helper" ran it with no oil, resulting in a broken con-rod. This was repaired by local motorcycle mechanics. Then because it died completely another repairer serviced the carburetor and installed a new diaphragm. It appeared to run ok.
But at first use after the service, and ever since, it dies repeatedly (after running for about 15 minutes) and the spark plug is black. Cleaning the plug gives another 15 minutes of use, then it dies again. This happens repeatedly.
I am not a mechanic, and I am at a loss. I have a fear that the valve or ignition timing may be incorrect (after the con-rod repair), but really I have little clue as to what is wrong.
Please can someone offer knowledgeable advice?
ThaiFarang.