Stihl, of Virginia Beach, Va. Has recalled about 3,000 of its MS 391 Chain Saws because the flywheel on the chain saw can crack causing parts to separate and strike users or bystanders, posing a risk of injury, the U.S. Consumer Product Safety Commission reported today. No incidents or injuries have been reported in connection with this recall. The recall involves Stihl MS 391 gas-powered chain saws with an orange top casing, gray base and black front handle and hand guard. 'STIHL' and 'MS 391' are printed in an orange circle on the starter side of the chain saw. The serial number is located on the crankcase to the right of the muffler when viewed from the rear of the saw.
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Serial numbers included in the recall are:. through. through. through. through. through Manufactured in the U.S., the recalled chain saws were sold for $530 to $550 at Stihl dealers nationwide from March through July 2011.
Consumers should immediately stop using the recalled chain saws and return them to an authorized Stihl dealer for a free installation of a replacement flywheel. For more information, call Stihl at 800-610-6677 between 8 a.m. ET Monday through Friday, or visit, or email [email protected].
At the side of the saw theres a cover, that you remove and inside is 2 screws you adjust the chain by turning the screws adjust the chain until theres just a little little slack NO NO NO NO NO, don't remove the cover. I don't know who answers these questions but i have owned about fifty different saws and I've never seen one where you remove the cover. (i own 14 saws now and am a logger/arborist).
For purchases from your participating STIHL dealer, proof of purchase is a copy of your STIHL dealer’s sales receipt (not a copy of your credit card receipt), which clearly shows the dealer name and address, KM 90 R and serial number, Kombi attachment model number and part number, and date of purchase and invoice. Re: stihl model?? « Reply #12 on: April 12, 2012, 10:47:03 AM » Fuel lines and filter all good, just put a full kit on the carb as diaphrams did'nt look to good also new plug - - - still no joy.
So leave the cover on, LOOSEN the nuts on the cover, you don't even have to take them off. Then ther should be a bar adjuster screw. Either a whole in the cover, on the otherside of the bar (in between the bar and the inside dawg) or sometimes even on the bar itself. It will be look like a slotted screw you just use a screwdriver). Check for spark. If its got spark than its probably fuel related. If you left gas in it, then it could need a full cleaning (carb, fuel lines, filter, etc).
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Before you clean the heck out of it you should check the compression and make sure it isn't shot. The quick easy way to check compression of a chainsaw is to pick your saw up, hold the starter handle then let it hang from the handle. The saw should NOT lower to the ground. If it does then you have lost compression. Always drain your saw of gas when you plan on storing it. Then run it till its completely dry and has no fuel in at all.
Then put it in a dry place. That's the best way to store them. You can leave the bar oil in it, it doesnt go bad. Now known as Model #: MS 170.
Single cylinder two-stroke engine: 30 cc (1.7 hp). Idle speed: 3200 rpm Bore: 37 mm Stroke: 28 mm.
Ignition System:. Electronic magneto. Spark Plug: Champion RCJ 6Y or Bosch WSR 6 F Electrode Gap: 0.5 mm (0.02') Replace spark plug after 100 o perating hours. Fuel/Oil System:. Carburator: All position diaphragm carb with integral fuel pump.
Air filter: Felt mat. Fuel Capacity: 0.25 litres (0.53 US pint). Fuel Mix: Unleaded gas with 50:1 mix ratio = 1 US gal.
With 2.6 US fl. Chain Lubrication: Fully automatic speed-controlled rotary piston oil pump. Bar Oil Tank Capacity: 0.15 litres (0.32 US pint). Weight (without bar and chain): 3.9 kg (8.6 lbs.). Recommended cutting attachments:. Chain: Low kickback (green label) 3/8' Pitch Picco Micro Mini 0.043' gauge. Marketing Number: 61PMMC3-50 Part Number: 3610 Guide Bar: Rollomatic 14 inch (35 cm).
Part Number: #3005-000-3909 or #3005-008-3909. Reduced Kickback (green label). Chain Sprocket: 6 tooth for 3/8' Picco Pitch. Carburetor Adjustment on Pro Saws Info Carburetor adjustment iscritical on chain saws and other two-cycle engines.
An adjustmentthat is too rich will cause a saw to smoke, have insufficientpower, and may damage the engine. An adjustment that is too leanwill also produce insufficient power and is mor e likely to damagethe engine. Proper carburetor adjustment will allow the saw toproduce maximum power, produce minimal smoke, run and idlesmoothly, and give trouble free service. An over rich carburetor adjustment is when the proportion offuel in the combustible air/fuel mixture is so high that the fueldoes not burn well. The burn does not produce much heat, so thepower stroke is weak. The partially burned mixture is expelled intothe muffler and exits the saw as smoke. An over rich conditioncauses carbon buildup and will plug the fire screen and cylinderports if run for a period of time.
A lean carburetor adjustment is when the proportion of fuelin the combustible air/fuel mixture is so low that there is notenough fuel to burn. This also makes a weak power stroke and causesthe saw to have insufficient power. In addition to low power, alean condition causes the cylinder temperature to rise, which o.
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