help 2cycle

ridonkulusSeptember 5, 2011


looking for help

mucculloch mb290 gas blower. wont start. cleaned air filter. new spark plug (replaced with champion 855 dj7y).

dont know how to troubleshoot from here.

wanted to see if there was a spark. this is how i did it: i removed spark plug and reconnected to ignition wire and left it off the cylinder dangling. pull started and i dont see a spark.

thx for any advice!

Thank you for reporting this comment. Undo

You must ground the sparkplug to the (metal) head / cylinder area to see a spark . If the spark is not blue and rather bright you may have a plug wire or coil weakening .

    Bookmark   September 5, 2011 at 6:08PM
Thank you for reporting this comment. Undo

thx for taking the time to help me out. ill try checking the spark that way. i also read your reply to the recent weed eater carb post and will use your advice on my own small engine issue.

    Bookmark   September 5, 2011 at 8:58PM
Thank you for reporting this comment. Undo

rid: No Problem let us know how it goes . Hopefully the coil is not faulty . Sometimes also you may have a on/off switch causing the problem , if the plug does not show a bright blue spark try disconnecting the ignition switch (bypass) then try for spark .

    Bookmark   September 6, 2011 at 5:23AM
Thank you for reporting this comment. Undo

ok. will do. thx!

    Bookmark   September 6, 2011 at 8:34AM
Thank you for reporting this comment. Undo

Lot of possibilities here but one thing that is endemic with the small 2-cycles is fuel starvation. Prime it, set the choke, then figure out a way to block the air intake while you pull the starter. This will usually get one going. It could be as simple as gum/dirt blocking the fuel pickup. Because the mix in the tank is dark, you usually don't see the fuel pickup or any crud in the tank. Empty it and take a look. Next, the mixture adjustment screws may have turned or been turned. Open them both up about one turn and see what happens. 2-cycles love fuel, and most of them will run a lot 'wetter' than a 4-cycle, so you may have to play around with the mixtures to get it to start, run cold and take the throttle when hot.
Or it could be the coil or switch as ewalk said. Heck, it could be both!

    Bookmark   September 14, 2011 at 8:16PM
Sign Up to comment
More Discussions
What’s a good safe cure to stop or slow root entering sewer line?
What’s a good safe cure to stop or slow root entering...
Older Troy Built Tiller Model ID
Trying to indentify model number of my unit. It is...
Who Makes This 'New' Craftsman 50cc Chain Saw?
Doing a little research on possible replacement saws......
General craftsman tiller gearbox question.
Ages ago in the early 90's, I bought a Craftsman 5hp...
What locked my Neighbor’s 6.5 Briggs Quantum Edge Engine?
I wanted to see what locked my Neighbor’s 6.5 Briggs...
Sponsored Products
Designers Fountain 82938 Tackwood 2 Light Island - 82938-BNB
$206.60 | Hayneedle
Safety Bath Seat - White
Signature Hardware
Tekno Mini Alfa Strass Crystal Pendant by James R. Moder
$442.00 | Lumens
Adagio Cottonwood Falls Fountain w/ Black Spider Marble in Rustic Copper Finish
Ivory & Charcoal Karima Shag Rug
$59.99 | zulily
Custom Back Tab Curtain Panel
Home Decorators Collection
Metropolitan Glass-overlay Outdoor Dining Table in White Finish, Patio Furniture
Yosemite Home Decor Lighting Kits 4-Light Oil Rubbed Bronze Ceiling Fan Light
$73.78 | Home Depot
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™