On Wed, 13 Jan 2016 05:24:30 -0800 (PST), bob_villain
wrote:

On Wednesday, January 13, 2016 at 4:39:38 AM UTC-6, Uncle Monster wrote:
On Tuesday, January 12, 2016 at 10:27:25 PM UTC-6, wrote:
On Tue, 12 Jan 2016 20:01:25 -0800 (PST), Uncle Monster
wrote:

On Tuesday, January 12, 2016 at 1:03:43 PM UTC-6, Don Y wrote:
A friend is having trouble with a small (5-7HP) engine.
Not starting. Aside from checking for spark (after
ensuring no "old" fuel present), I can't think of any
easy tests that he can perform...?

I've replaced the little electronic ignition modules that are attached to the mag coil to fix some small engines. I have some brass shim stock of different thicknesses that I've use to set the clearance for the magneto coils on small engines. The shim stock is a lot easier to use than feeler gauges to setup the mag coil. If the coil is too far away from the flywheel, the engine will not run. Your friend can lookup the specs for his engine on the manufacturer's website and use a feeler gauge to check that clearance. ^_^

[8~{} Uncle Feely Monster

A business card works pretty well to adjust the mag clearance.

I recall seeing something like that in a manual for small engine repair but I wonder if most business card stock will be the same thickness? Of course there is always that saying, "Close enough for government work." (•?•)

[8~{} Uncle Precise Monster

We used 3x5 index cards...they cover the span better.

What is sold as "super thick" index cards are also 100lb stock - and
11pt thickness - so"good enough" Most 90 to 110lb card stock is
either 11 or 12 pt. 1 110 lb 11pt is "harder" than a 100lb or 90lb
12pt stock, but the same thickness.

Average cereal box is about 23pt - too thick.
American paper currency is aproxemately .004" (4 pt) which is way too
thin.