J and J Small Engine Blog

RSS Grab J&J Small Engine Clinic Blog Feed

Small Engines that are Smoking

Joseph Coupal - Friday, July 29, 2011

Many small engines are in good repair, but they start smoking when you start them up. In many cases, you may be able to fix this on your own. Here are some quick tips on what to look for to try to solve your smoking small engine.

  1. You may have a dirty or plugged air filter. Replace or clean it.
  2. Worn Damaged Rings. Rings and cylinder may be worn past their tolerances due to age and lack of maintenance. In this case it, bring the engine in to be evaluated for repair options.
  3. Loss of crankcase vacuum. Make sure the dipstick or fill plug is secured tightly. You may also have bad O-rings, gaskets and washers. 
  4. Scored cylinder. This is caused by ingesting dirt. Either a very dirty air filter or a missing air filter will cause this.
  5. You may be using the wrong grade/viscosity of oil. It is very important to use the proper viscosity recommended by the manufacture. It is also important to use oil designed for Air-Cooled Engines, most oils in stores are designed for automobiles with water cooled engines.
  6. Some engine failures are due to Gasoline. Either  gas sitting stagnant and clogging the carburetor, or the Ethanol in the gasoline has caused some kind of failure to the components.  The float no longer shuts off the gas and causes it to leak into the oil. This will also cause the engine to smoke and will required repair. 
  7. Leaking head gaskets. A head gasket typically leaks due to the engine overheating . Nesting or grass build up in your engines cooling fins prevent the proper amount of air circulation to cool itself and the engine overheats, warping the cylinder head causing the gasket to no longer seal properly. Low oil, Running the engine for a long period of time with low oil will also cause the engine to overheat, when the oil is then filled to the proper level it leaks by the head gasket. This situation would have to be diagnosed and repaired.
  8. The choke is still on. Open the choke as soon as the engine fires and continues to run without stoppping.
  9. There may be too much oil in the engine. Correct the amount of oil in the crankcase. Fill it only to the "Full" mark.

Get e-mail notifications of new blog posts! Enter email address below.

Delivered by FeedBurner

Recent Posts


2 stage snowblowers small engine service power tools, north attleboro commercial lawn mowers outdoor power equipment repair specialist, North Attleboro, MA Stihl basic power tools, Attleboro leaf blowers, MA STIHL backpack blower sprayer, MA mulching lawn mowers, North Attleboro new power tools, Ma power tool repair hedge trimmers lawn care, MA single stage snow blowers, North Attleboro, MA small engine maintenance, MA snow blowers, North Attleboro hand-held gardening equipment sawzall, MA STIHL chain saws lawn mower repairs, ma snow blowers, MA, RI 2 stage snow blowers, North Attleboro, MA lawn mower storage battery operated electric lawn mowers, MA lawn care, North Attleboro North Attleboro snow blowers with electric start holiday shopping portable generators, North Attleboro Stihl Dealer power equipment lawnmowers, North Attleboro small engine repair Toro snowblowers two stage snowblowers, North Attleboro, MA prepare lawn mower for winter storage over seeders, North Attleboro Small Engine tips for preparing lawn mower for winter storage gas leaf blowers, North Attleboro wet/dry vacuum power tools sales, MA power tools service, MA STIHL backpack blowers chain saw lawn mower won't start, MA snowblower maintenance lawn and garden power tools, North Attleboro fall cleanup Toro snow blowers, MA, RI small engine oil cordless drill, MA outdoor power equipment maintenance, North Attleboro regular maintenance, MA snow blower maintenance and repairs engine overheating power equipment, North Attleboro, MA snowblowers require maintenance, North Attleboro, MA gas lawn mowers leaf blower repair, North Attleboro, MA common small engine problems problems with lawn equipment, MA STIHL leaf blowers, north attleboro right fuel for power equipment Attleboro 2 stage snowblower, North Attleboro standby generators, MA electric drill chain saws, MA Kipor generators, MA new snowblower, MA small engine parts and service, MA order small engine parts generators Generac generators, North Attleboro, MA STIHL chain saw power tools maintenance, MA ethanol free fuel, MA snow blower storage pursh zero turn mowers trenchers Toro Stihl Wrigth North Attleboro MA zere turn mowers snowblowers, North Attleboro mower blade needs sharpening, North Attleboro power hand tools, MA snowblower tune-up new power tools wood boring drill backpack blower sprayer, MA electric lawn mowers, MA two-stroke engines 2 stage snow blowers snowblower maintenance, North Attleboro, MA Wright lawn mowers power tools Gasoline-powered tools STIHL auger lawn mower engine problems, MA gasoline with more than 10% ethanol shop vac, MA backpack blowers putting your lawn mower away for winter storage outdoor equipment two cycle engines, MA zero turn lawn mower gas powered tools, MA power tools not working, MA Father's day power tools, MA generator service, MA STIHL leaf blowers power tools for women, MA snow blower maintenance snow blowers, North Attleboro, MA gasoline chain saws cordless electric lawn mowers, MA leaf blower maintenance, MA regular maintenance snowblower repair, North Attleboro trimmer, North Attleboro economical snow blowers, MA, RI outdoor power equipment repair and maintenance, North Attleboro, MA pressure washer electric mowers, MA handheld leaf blowers WRIGHT engines idles wrong lawn mower blade sharpening, MA Massachusetts electric hand held leaf blowers, North Attleboro small engine sales repair service north attleboro ma generac generator, MA lawn mower service, MA E10 gasoline, North Attleboro small engine tools yard equipment won't start, MA outdoor power equipment, North Attleboro leaf blower service STIHL blower sprayer, MA preparing your lawnmower, ma yard equipment, MA edging, MA small engine service department, MA snowblower shopping, North Attleboro small snow blowers, MA, RI small gas engine repair, North Attleboro, MA standing vs sitting mowers, MA power tool sales and service, north attleboro right fuel for power tools aerators, North Attleboro snow blowers two stage snow blowers, North Attleboro, MA power tool maintenance leaf blowers for clearing snow outdoor power equipment repair and maintenance, North Attleboro lawn mower carburetor yard tool service, MA toro snow blowers care of lawn mowers, North Attleboro new snowblower Attleboro, MA pressure washer, North Attleboro small machines back pack leaf blowers tax free weekend, MA standing mowers, MA power tool repairs, MA Local small engine repair magneto, MA sales and service of small engine equipment power tool repair, north attleboro ethanol-free gas J&J Small Engine Clinic stationary generators, North Attleboro, MA engine parts, North Attleboro tips for outdoor power equipment, North Attleboro lawn mower maintenance, North Attleboro chainsaws small engine service department, North Attleboro outdoor power equipment repair North Attleboro power tool engine parts, MA lawn equipment, MA ethanol-free gasoline gas for small engines, MA black friday power tools parts, MA gas snow blowers smoking small engine, MA string trimming, MA drought lawn care, MA commercial generators snow blowers require maintenance, North Attleboro, MA generator service small engine repair, MA small engines, North Attleboro bar and chain buying a snowblower, MA STIHL trimmers vacuum power tool maintenance, MA small engine equipment snowblower needs a tune-up care of power tools, North Attleboro outdoor power tools portable generators, MA chain saws, North Attleboro two-cycle engines outdoor power equipment repair questions, North Attleboro, MA power tools, North Attleboro, MA small air cooled engine lawn equipment engine problems, MA STIHL wet dry vac Generac generators, MA leaf blowers hedge trimmer, North Attleboro backpack leaf blowers small engine repairs snowblowers, MA Toro lawn mowers, North Attleboro power tool storage tighten the chain smoking small engine lawn mower service new lawn equipment, MA lawnmowers, MA gift ideas, North Attleboro, MA shop vacuum, MA gas for snow blowers, North Attleboro, MA generator repair and maintenance, North Attleboro, MA portable generators, North Attleboro, MA stocking stuffers generators, North Attleboro power tool maintenance, North Attleboro leaf blower won't stay running, MA electric snow blowers, MA, RI snow removal single-stage snowblower air filter E10 gas lawn mower tune up, MA power tools, MA Torro lawn mower E10 gas, North Attleboro small engine parts, North Attleboro, MA snowblowers necessary power tools, Attleboro rototillers, North Attleboro trimmers, MA chain saw FAQs circular saw, MA generators, North Attleboro, MA fuel-related problems electric leaf blowers, North Attleboro battery-powered yard equipment lawn mower maintenance gasoline small engine service, MA small engine repair sales services north attleboro carburetor kits sharpen mower blades, MA ethanol free gasoline lawn mower wet-dry vac new power tools, North Attleboro standing lawn mowers, MA snowblower small engine tune-up, MA power tool engine parts new lawn mower, MA wet dry vac TORO lawn mower blades, North Attleboro, MA backpack sprayer, MA flywheel, MA small engine parts lawn mower, MA lawn mower batteries, North Attleboro, MA lawn mowers, MA preventative maintenance preparing lawn mower batteries for winter storage, North Attleboro, MA father's day gifts, MA power equipment retailer, North Attleboro lawn mower engine parts, MA choke trimmers and brushcutters small engine tune up, MA zero turn lawn mowers, MA Generac portable generators, North Attleboro leaf blower repairs, MA sprocket nose bar snowblower safety small engine maintenance filters blower sprayer, MA prepare snowblower for storage, North Attleboro fall maintenance on lawn mowers, North Attleboro new and power tools, North Attleboro power tool service, north attleboro lawnmower service, North Attleboro cordless drill snow throwers small engine parts, MA single stage snowblower, North Attleboro yard tools, MA power equipement repair and maintenance lawn mower carburetor, ma leaf blower won't start, MA toro lawn mowers, MA STIHL brushcutters Local small engine repair, MA power tools parts and service, MA green lawn mowers blowers, north attleboro small engine problems, MA ethanol free gasoline, MA ethanol free gas, MA leaf blower parts, MA outdoor power equipment sales portable generator small engine repair north attleboro ma single stage snowblowers, North Attleboro, MA standing lawn mowers spark plugs small engine repair, North Attleboro standing vs sitting lawn mowers, MA power tool repair and maintenance, North Attleboro beginner power tools, Attleboro generac generator small engine repair shops, MA leaf blowers, north attleboro smoking engine, MA Generac portable generators, North Attleboro, MA new snowblowers, North Attleboro, MA STIHL power tools snowblower maintenance and repairs two-stage snow blowers hand power tools, MA annual maintenance, MA Recycler series power lawn mowers wet vacuum generators, MA edgers, MA electric chain saw power tools repair, MA outdoor power equipment repair, North Attleboro, MA women and power tools, North Attleboro small engines seasonal snow blower maintenance, North Attleboro, MA leaf blower powerwashers, North Attleboro power tool repair, MA generator, MA backpack blower, MA lawn mowers, North Attleboro small engine repair air filter service north attleboro power outages push mower, MA power tools for Father's day gifts, MA stand by generators, MA power tools won't start, MA maintenance of power tools schedule lawn mower maintenance, North Attleboro lawn mower maintenance, ma air filters lawn care equipment, MA snowblower maintenance, North Attleboro service power tools mower blades, MA buying a generator torro lawn mowers STIHL extended reach hedge trimmers power tool parts, MA ethanol-free gas, North Attleboro, MA zero emission lawn mowers, MA small engine repair servcies north attleboro ma preparing a small engine for winter storage, North Attleboro, MA leaf blowers, North Attleboro, MA snow blowers, MA power tools maintenance and repair, North Attleboro power tool service, MA power tool parts and service, MA where to buy ethanol free gasoline, MA parts and service for all small engines, North Attleboro small engine repairs, MA engine dies leaf blower service, MA power tools, Attleboro gas stabilizer, North Attleboro, MA gas powered snowblowers, North Attleboro small engine problems two stage snow blowers small gas engines yard care equipment, MA string trimmers wet dry vacuum snowblower won't start outdoor power equipment repair, North Attleboro power equipement repair power tool service ethanol free gas spring lawn mower maintenance, North Attleboro lawn tools, North Attleboro outdoor power equipment mower tune up, MA Torro lawn mowers, MA leaking head gasket STIHL hedge trimmers Torro zero turn lawn mower lightweight portable generators, MA shop-vac snow blower maintenance, North Attleboro, MA lawn mowers hand-held power tools wheeled blowers, North Attleboro STIHL drills solid nose bar residential generators causes of small engine problems Toro lawn mowers EPA standards buy and power tools, North Attleboro lawn mower tune up prune trees benefits of standing mowers, MA snow blower repair, North Attleboro new power equipment, MA pole pruner recycler lawn mowers, MA lawn mowers care, MA fuel containers compact two-stage blower new lawn mowers, North Attleboro gas leaf blowers fuel stabilizers power equipment repair, North Attleboro, MA string trimmers, MA electric snow blowers small engines, MA wet-dry vacuum portable generators wet dry vac, MA battery powered lawn mowers parts, MA electric power tools, MA wet vac power lawn mowers small engine service, North Attleboro, MA portable generator repairs, MA engine won't start chain saws service and maintenance or portable generators, North Attleboro, MA ethanol free gas, North Attleboro, MA locally owned power tool dealer, north attleboro outdoor power equipment, North Attleboro, MA storing the snow blower damage to outdoor power equipment generator repairs, MA plug in lawn mowers sales and service of power tools fuel for engines zero turn mower engine oil electric lawn mowers two-stage snow blower two cycle engine repairs, MA