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


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