Husqvarna 350 Lost Spark

[dougand3]

Sugarbush is saying check that the coil screw is grounded. A wire from bottom coil screw to fins does that. Check spark at the plug normally. Husky 350 coil screws mount in plastic. There is a Z shaped clip that mounts under bottom coil screw and under bolt that holds engine in the plastic chassis. It's called an earthing strip - lets coil touch ground. Is it there?

 

[Sawyer Rob]

OK, thanks for clarifying that for me!

I took #10 wire, and as the saw is sitting up right, I hooked the wire to the bottom coil screw, with the other end to a cyl. fin, spinning with a drill checking for spark with two different plugs... (I also held on to the end of the plug wire to make sure lol) it's still a no go!

Dang, this is frustrating! lol

SR

 

[sugarbush]

if you spin to slow you won't git a spark. kill switch wire unhooked at coil. plug base grounded on cyl. if plug and coil are good you should have spark.

 

[dougand3]

Brand new coil may be bad?
Check magnets on flywheel - good magnetism?
I'd pull the coil and check the earthing plate / grounding strap connection - the coil screw must contact the engine. Is it dirty/corroded so no juice flows? Is grounding plate broken in half?

 

[Sawyer Rob]

Thanks guys, I'm going to find some time to look it over again, later today... Will let you know what I find, then.

SR

 

[Sawyer Rob]

OK, today I took another look at everything you guys mentioned, everything looked the same to me, except I did spin the motor over faster when using a separate wire for grounding, AND there it was....spark!!

SO, I took the extra ground wire off, and checked without it, it still has spark... I really didn't do anything different from yesterday, so I put the recoil on it and check for spark. It still had spark so I put it all together and took it outside.

I really believe the original coil was bad and turning it over FASTER (as was suggested) was the reason I wasn't seeing spark yesterday. Anyway, a few pulls with the choke on, and it was running, but it needed some choke to stay running, so I put more gas in it, warmed it up and although it will scream, it doesn't want to run slow without having to keep messing with the choke.

I did try turning the lo speed screw, but I never got it to run right, it now has carb issues that it didn't have before, but it got late, so I gave up working on it for today...

I want to THANK all of you that gave me help with this, I learned a lot, and I couldn't have got it running without all of your suggestions!

Now, can anyone tell me how much the low speed screw should be turned out, for a starting point??

Thanks again,

SR

 

[dougand3]

L screw - 1.5 turns out / CCW from lightly seated is a good starting point. H screw - 1.25 turns out. If carb can't be tuned in, a new AfterMarket one is $11-$17 on ebay. Also, a fast idle could be an air leak.