Skip the auto shop - Our mechanics make house calls

Q: lawn mower won't start and i need advice

asked by on

I have a '74 onan ss16 twin engine on a 1974 sears suburban tractor. I have been working on it for roughly 1 week now and i havent been able to get it to fully run. It has a quite outdated point condenser ignition system that is mounted in a box like structure. i have power to all components of the ignition, i am getting full fuel flow throughout the valves, both spark plugs are fully functional and are making spark however when placed on the head and back on the mower i am not getting any spark at all through the spark plugs and i dont understand. please help! thanks

A: The coils do not go bad very often and woul...

The coils do not go bad very often and would show signs of bulging if it did. The points and condenser should be replaced since these are the most common failed part on the ignition. Replace the points and condenser and adjust the points to about .025 if I am not mistaken. You should be off and running after that.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel pump not priming

Hi. The first priority is to get the vehicle to crank over, without engine/camshaft RPM's, the engine computer will not start up the fuel pump. The starting circuit needs to be diagnosed. Some of the causes could be an ignition...

Q: Car cranking, but then dying

From my experience, checking the fuel filter and spark plugs is a great place to start when trying to determine why your VW beetle is sputtering and stalling out. The symptoms you describe however sound like your Volkswagen is experiencing...

Q: Car turns off randomly

There can really be several reasons why your Ford Bronco II randomly turns off. While the information provided is a bit limited, I do have a good idea on where we can start. You are on the right track to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.