The engine technology of the stihl power tools is developed for both people and nature. I have a stihl 4 mix engine i have converted for aircraft use on a cub. Page 2discussion stihl 4 mix engine conversion with carb issues. Since weve been looking at some interesting engines lately that take the road less traveled, a comment by rafe03 on the ellwood hybrid story. Correct way to adjust or tune the carburetor on a weedeater grass trimmer video duration. Stihl chainsaw engine innovative technology includes 2 mix or 4 mix engine, longlife filtration system, catalytic converter and cordless power. A simplified startup sequence for convenient starting, loop handle, control handle with. But i have nothing bad to say about my trimmer, it is awesome.
In addition to the softwarebased preliminary work, the plants toolmaking is. Get outdoors for some landscaping or spruce up your garden. View or download the stihl technical reference guide 2016. Stihl 4 mix starting problems possible solution archive. Powerful petrol brushcutter for working on large areas of tough grass. Stihl 4 mix engine conversion with carb issues hi all, its been a while since i have actually logged in here but i have an interesting project and an interesting problem too. The system revolutionizes the cutoff machine industry by allowing air filters to last up.
They are in fact a 2 stroke because they must have a gasoil mix and they fire every revolution. The awardwinning stihl fourstroke engine that runs on a petroloil mix. Anyone have any thoughts on stihls new 4 stroke engines that use 2 stroke oil for lubrication. Stihl engine replacement parts fast shipping at repair. Ankit droch, program analyst at cognizant 2018 present. Someone please explain a 4 stroke engine needing 2 stroke. The km 91 r kombimotor gives professional landscapers ultimate control over their tool selection.
Fs 111 robust 1,05kwbrushcutter with 4mixengine and. The announcement was made at the 2001 green industry expo in tampa, fla. Looking to upgrade my kombi engine unit from the 94 rce to one of. Granted, i didnt do much research on it because stihl doesnt have any. Stihl, the number one selling brand of cutoff machines worldwide, features the x2 air filtration system. How to adjust valves on a stihl 4mix trimmer or blower. I would check the throttle like papaperk suggested. The service manuals for stihl 4mix engines outline testing procedures as well as special tools that are needed to repair the equipment. Stihl, of course, recommends their brand of oil, because there is a potential problem of excess carbon build up in the valve area. Km91r stihl kombi pro 4 mix power head q5 added id stihl products are in store pickup only. Changed spark plug,put meter to the kill switch used good fuel no go. Animation of functionality of the stihl 4 mix engine youtube. It has two revolution of crankshaft between one power strokes.
I would think there would be less than perfect lubrication and. Page 2 click to download the stihl 4mix engine check worksheet. Stihl 4 mix vs echo 2 stroke i use to be the project manager for a parts supplier to homelite. During scavenging a layer of air without any fuel is created between the burnt charge in the. For the extra complexity over the subarurobin it doesnt seem to hold any. Stihl new 4 stroke using 2 stroke fuel mix bob is the. Stihl 4mix trimmer engine motorized bicycle forum motored. Shindaiwa hybrid 4 engine technology animation duration. The twostroke engine with 2mix technology sets new standards. A simplified startup sequence for convenient starting, bike handle, control handle with. Perfect starting, superb acceleration, optimal engine performance at all times with a constant maximum speed. This engine design makes it similar to a 4 stroke, but it still requires a 2stroke 50. Not only are they gobsmackingly good, but they have developed a 4 mix engine, its a four stroke but uses 2 stroke oil, so no sump, but is more torquey than revvy and has much less emissions emissions is a big issue even for 26cc garden tools.
Exhaust is clear, has new fuel filter, and still will not rev up. The twostroke power unit with 2 mix technology is convincing with its high engine power, excellent powertoweight ratio and outstanding torque development for high cutting performance and pulling power. Mar, 2011 with the way the 4 mix works it has some superior attributes. I have been told that it is better to run the higher quality stihl oil in the 4 mix engines though. The system revolutionizes the cutoff machine industry by allowing air filters to last up to a year, based on cutting conditions.
Animation of functionality of the stihl 4 mix engine. Best oil for stihl 4mix engines bob is the oil guy. The fuel mixlubricated 4mix engine is light and compact. Since weve been looking at some interesting engines lately that take the road less traveled, a comment by rafe03 on the ellwood hybrid story pointed to this hybrid that needs no oil in the crankcase and no oil pump either, but it operates as a 4 stroke. Stihl 4 mix engine conversion with carb issues rc groups. The shindiawa does something i like by sending all the airfueloil mix to the crankcase and creating a supercharging effect to feed the intake valve. As well has having plenty of lugging power and perceptibly higher torque, the 4 mix engine is also convincing in terms of lower emissions, low maintenance and a pleasant sound. Worksheets are available for both 2cycle and 4mix engines. Sep 29, 2017 correct way to adjust or tune the carburetor on a weedeater grass trimmer video duration. You have all the hassel of 2 stroke premix and none of the advantages of a 4 stroke. Breaking it down as we lead the charge in developing.
Yeah, i knew the reason for the 4 mix was pollution but you have to admit its quite a bit smoother, isnt it. Stihl produces the number one selling brand of chainsaws and a full line of outdoor power tools including blowers, trimmers, brushcutters, and construction tools. Page 1 the stihl troubleshooting video and corresponding icademy module are ideal checklists to use when performing repairs and will assist the technician in performing a step by step. I know stihl has a terrible rep for starting issues especially on a hot day but ive found the reason for me anyway on the 4 mix kombis if you are having the same prob which i know at least a few are by whats written on here then you will kick yourself for how simple it is we have two 4 mix kombis and never had starting issues nearly always first pull hot or cold, but eventually.
Stihl 4mix engines general chat arbtalk the social. What is the difference between a 2 stroke and a 4 stroke engine. The stihl 4 mix engine thus combines the advantages of a 2stroke and a 4 stroke. Whent on line landscape site and found guy that said there was problem with fuel tank vent going into breather box and if u over fill with fuel or seats. It is stihl s answer to the carb requirements and may at some point be a factor, but new products like this take some time to develop.
To make starting the stihl 4mix engine easier, the engine has been fitted with a decompression system which extends the valve opening times when starting. Since 2002, the stihl 4mix engine has been powering a range of petrol tools including brushcutters, backpack blowers, hedge trimmers, pole. Stihl 4mix engine for kombi system forum landscape. Hello all just wondering what 2stroke oil people use in stihl 4mix engines just about he get a stihl kombi kmr and getting a little confused as some people use any old oil. Shindiawa hybrid 4 vs stihl 4 mix i have the unusual experience of having read and seen animation of one of these engines and had the other engine in hand to examine.
Stihl 4 mix engine conversion with carb issues page 2 rc. Stihl series of 4mix brushcutters had three main goals. May 26, 2014 just a little tebit i could not start my sr90 trimmer for the life of me. Discussion in mowers and more started by r7000, jun 19, 2018. That is one of the reasons stihl and shindaiwa have a 4 mess. To make starting the stihl 4 mix engine easier, the engine has been fitted with a decompression system which extends the valve opening times when starting. Granted, i didnt do much research on it because stihl doesnt have any competition in its price range. The stihl 4mix engine thus combines the advantages of a 2stroke and a 4stroke.
That being said they are based on a 4 stroke principal because they have a cam and intakeexhaust valves. More information about our technologies youll get here. Its a 4stroke engine that still requires you to premix your fuel at a 50. Aug 07, 2006 ohh, you mean like bouncing off the rev limiter like a car would do.
The stihl 4mix engine check worksheet is a simple guide to verify any faults found in a logical and efficient manner. That being said they are based on a 4 stroke principal because they have a. I know stihl has a terrible rep for starting issues especially on a hot day but ive found the reason for me anyway on the 4 mix kombis if you are having the same prob which i. Not only are they gobsmackingly good, but they have developed a 4. The stihl 2mix engine in the stihl ts 410420 cutoff machine. Before any repair work is performed on a machine, a thorough evaluation should be made to determine what parts are actually in need of replacement or maintenance. Ive been running an fs90r string trimmer for 7 years now, a br600 blower for 2, and an ht101 for 2. Stihl technical reference guide chainsaw workshop manuals. The functioning of the stihl 4 mix engine duration. Animation of a four stroke internal combustion engine. Stihl usa the number one selling brand of chainsaws. Starting the prizewinning stihl 4 mix engines is thus convenient and quick. Before any repair work is performed on a machine, a thorough evaluation should be made to determine what parts are actually in need of.
I thought stihl 4mix products were 4 cycle, but the website says they have a 50. If your guaranteed delivery item isnt on time, you can 1 return the item, for a refund. May 31, 2012 hello all just wondering what 2stroke oil people use in stihl 4 mix engines just about he get a stihl kombi kmr and getting a little confused as some people use any old oil and others say you need fully synthetic stihl oil or it leaves carbon deposits. I had didnt know it was a 4 mix until i got it home. The 4mix engine on the stihl fs 91 r weed eater is an intriguing concept. Stihl 4 mix troubleshooting and repair guide chainsaw. In the stratified charge system, a fuelfree cushion of air is inserted between the burnt charge in the combustion chamber and the fresh charge. As well has having plenty of lugging power and perceptibly higher torque, the 4mix engine is also convincing in terms of lower emissions, low maintenance and a pleasant sound. Low emissions and more engine power on this stihl kombi pro power head. For the extra complexity over the subarurobin it doesnt seem to hold any advantages for mb use.
Your trimmer is a 4 stroke so you will not be a able to tune it like you do a 2 stroke. Stihl 4mix troubleshooting and repair instructions pdf download. Just a little tebit i could not start my sr90 trimmer for the life of me. This chainsaw guide stihl technical reference guide has various settings and adjustments for many stihl products. Anyone have any thoughts on stihl s new 4 stroke engines that use 2 stroke oil for lubrication. It runs quieter, cooler, has lower emissions, and more fuel efficient than the fs80r. Pdf information and available in full download version by browsing on search engines. The fuel mix lubricates the engine like a 2 stroke. The delivery date is not guaranteed until you have checked out using an instant payment method. I replaced the air and fuel filters, spark plug, cleaned the spark arrestor and adjusted the valves. Ohh, you mean like bouncing off the rev limiter like a car would do. Worksheets are available for both 2cycle and4mix engines.
Stihl bases the technology selected for a particular product on that which is best suited to the products applications. View online or download stihl 4mix troubleshooting and repair instructions. Ive also worked on several pieces of equipment powered by the 4 mix. Yeah, i knew the reason for the 4mix was pollution but you have to admit its quite a bit smoother, isnt it. Keeping the valve clearance within the recommended range will ensure that your engine operates at maximum power and fuel efficiency, and. Sep 14, 2009 the functioning of the stihl 4 mix engine duration. I purchased a stihl km 110r power head that uses their new 4 mix engine. The stihl 4mix engine thus combines the advantages of a 2stroke and a 4 stroke. We had a couple of stihl reps come to our depot to demonstrate their range of blowers and strimmers. Take the choke off and it stalls like not answered by a verified technician. The stihl 2 mix engine in the stihl ts 410420 cutoff machine. I just bought a 4 mix trimmer last spring, so i only got to use it for a year.
I think a 4 mix chain saw, if producing the same power and torque as the 2stroke counter part would be awesome. An accurate repair cost estimate can then be prepared. Honda is the only company that makes a true 4 cycle hand held trimmer and edger. Stihl new 4 stroke using 2 stroke fuel mix bob is the oil guy.
Like the fourstroke and twostroke engines, the stihl 4mix engine is an internal combustion engine. Stihl suggests to decarbonize the engine every 150hrs. I had didnt know it was a 4mix until i got it home. Page 2discussion stihl 4 mix engine conversion with carb issues engines. Granted, the thing works great for its intended purpose.
The fuel is transferred every 2nd cycle but the plug fires every every cycle. I purchased a stihl km 110r power head that uses their new 4mix engine. Because it is a four stroke engine, it captures the whole power stroke so it produces more torque than the fs80r. Stihl chainsaw engine innovative technology includes 2mix or 4mix engine, longlife filtration system, catalytic converter and cordless power. Cant really work out the advantages of it at present. Energy is released during combustion of the fuelair.