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How to repair an old lawn mower dynamo - no spark

How to repair an old lawn mower's dynamo - spark weak.
Its a rather old ATCO 2-stroke cylinder (aka reel) lawn mower. Has worked well for years and years, but now spark is too weak to work. I tried cleaning the plug, which worked a week ago, but I noticed the spark was really weak. Started then stalled after a few minutes today, wont restart. Time to look at the dynamo?
Is it easy to repair/improve the spark fairly easily?  - barnsfromOz

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Posted on Jan 02, 2017

  • 211 Answers

SOURCE: My lawn mower doesn't start

Hi Every 2 stoke engine needs three things to run:Fuel+oil/air mixture in correct proportions,compression and ignition.Remove the sparkplug and see if the spark appears when the piston in the cilinder is at top death point(almoust),if not check the flyweel key(not to be sheared).Check engine"s sealing(crankcase gasket,cilinder gasket,seals-crankshaft,carb gasket).Also the mufller(not to be clogged),disassembly the carb (check and clean it),fuel lines and fuel filter (check and clean them),gas cap tank vent(not to be clogged),the air filter.Please let me know. best regards savumihai71

Posted on Dec 22, 2008

  • 17 Answers

SOURCE: lawn mower does not start up

Lots of thing can stop a victa working!!!!!!!!!. Ok your plug is wet. Turn the fuel off. R&R tank renew fuel(no more than a month old it goes stale)Check for spark, be very careful it could catch a light.
Get the new plug open the gap to about 5mm.earth the hex of the plug to the head, away from the plug hole ,the fuel will come out.
If it jumps gap when pulled it has enough spark to fire under load.If lots of fuel comes out its flooded.if so leave plug out remove a/f ,leave tap off, put throttle to full and pull till most fuel is gone.Refit plug and try. let me know how that goes. do this in well vented area. Fumes can build up in shed.

Posted on Jan 08, 2009

  • 246 Answers

SOURCE: can't start toro mower. cleaned spark plug , new

Hello:

There are 2 Possible Causes for this Problem.
1- The Carburetor Requires Soaking and Cleaning.
2- The Valve Clearances Require Setting.
You can View a Breakdown of this Unit at the Following Site Addy.
https://lookup3.toro.com/partdex/default.cfm
Hope this Helps.

Good Luck

Respectfully

John

Posted on May 10, 2009

  • 133 Answers

SOURCE: engine will not start, no spark

Try taking of the engine shroud and cleaning the magnets on the fly wheel. Also clean the two little prongs that are really close to the fly wheel. Use fine sand paper or emery cloth. Then check the spark plug wire for rust (clean if any). Try replacing the spark plug if it is old.

Let me know if this helps.

roundo4

Posted on Aug 22, 2009

  • 128 Answers

SOURCE: Hayward super pump II low pressure 10 psi suction and return low

You have a clogged impeller

Posted on Aug 23, 2009

Testimonial: "thanks for the response. That is exactly what it was. Got frustrated and just started taking things apart, but you are right on the money! tks again."

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