Ignition gap for yard machine 31cc Y28 17

SOURCE: fuel line routing yard machine 31cc cultivator

unit with primer bulb,,,,,line from gas tank with filter, goes to bottom of carb, from top of tank to suction side of primer bulb, from output of primer to tank return

Testimonial: "Thanks for the info, tiller runs fine. Phil"

SOURCE: 31cc yard machine garden cultivator.

Only 3 possibilities for no spark. First, are you using an inline spark tester to determine there is no spark? If so, here's your possibilities.
1. The on/off switch is shorted out.
2. There is a short in the wire(s) from the switch to the ignition module.
3. The module is faulty.
Dissassemble the engine cover far enough to access the module. There is a small wire that leads to a spade connector on the module. Disconnect this wire. Retest for spark. If you still have no spark, the module is faulty and must be replaced. If you now have spark, then the module is good, so back track the wires to the switch to determine if the wires are pinch or chaffed, or if the switch is stuck in the off position.

If you are not testing for spark with an inline tester, please, please go to Walmart or Pepboys or Autozone or NAPA or Sears and spend $7 to $10 on the tester....it will save you alot of trouble.

Good luck.

Roy Cagle

• 1545 Answers
• Posted on Nov 24, 2010

SOURCE: I need a diagram for

Here is a parts breakdown for your machine (found under MTD) with parts listings, diagrams and prices.
http://www.partstree.com/parts/?lc=MTD&mn=21A-121R900