It is very interesting to see how well the saw works after three months of intensive use without service. I don’t think that the airfilter is a problem, becouse I already had the opportunity to test the saw and when I checked the airfilter, it was attatched very well. The seam looked good as well.
Could you please tell me what type of fuel was used during the test?

I have owned my Jonsered 2095 Turbo for many years – bought new in 1991. The only maintenance ever done was a new filter and spark plug after about 15 years! and many many tons of wood cut. I actually only replaced those two items at that point as I felt obligated to perform some sort of maintenance on the saw. This Low (VERY LOW ) maintenance requirement is a Tribute to the ignition system and the FANTASTIC air separation called “Turbo” by Jonsered back then ( air injection by Husqvarna today ) So VERY VERY VERY efficient is the air/dust separation that I never even had to clean the filter during those many years of wood cutting (DRY WOOD) !!! The previous saw was a Sthil which required the air filter to be cleaned every couple of tankfuls…….what a pain. I am a great advocate of fuel injection of two stroke and have a history in its implementation in the field of 2 stokes. Finally its found its way to the chainsaw industry. BUT after designing a saw to accept fuel injection you neglect to incorporate air injection/turbo/ whatever you want to call it of the air supply. The application use /purpose of the saw is invariably in a dusty environment. Loggers may cut greed wood (less dust ) but a great portion of the market cuts wood for domestic use (dry wood ) which generates massive amounts of dust particles in the saws immediate area………… Either way, I feel is was a major failure to design the saw without this method of air filtration especially given it success over the years. A saw(motor) needs only 3 things to operate air /fuel /spark. Spark is covered, fuel you fixed with injection and air…….well you dropped the ball on that one. For that little bit of extra effort of (air particle separation) – I would have gone out today and bought this saw. I am in need of one, as I lost my Jonsered ( and %90 of my belongings) in the 2020 bushfires here in Australia. SO after nearly 20 years of faultless operation of cutting wood to burn in our home fires – the fire finally got its revenge.

What a story Glen! Sorry for your Jonsered an everything that was destroyed by the fire. I hope there is a life also after those horrible bushfires.

Stihl has had a production fuel injected 2-stroke on the market, and presumably many thousands sold in the form of their TS400i and TS500i cutoff saws for around a decade.

Cutoff saws generally live a pretty hard life eating concrete dust and worse, so a pretty good place to ground test how well a relatively ‘complex’ (as against carburettors) fuel delivery system stands up to long term use and abuse.

I have one of the latter, manufactured in 2011 and hauled out the the shed recently after many years of non-use. To my pleasant surprise, after replacing the fuel priming bulb, which had perished after standing for several years, with the engine filled with fresh fuel, it ran up no problems.

So the longevity of the injection system and electronics is already quite well proven.

I should add I’ve just bought an MS500i to replace/upgrade my older MS441 C-M which has been a great (and reliable) saw.

So I have reasonably high expectations!

Very nice video guys, very impressive saw.
So with 20 tanks run through the 500i which is roughly three 7 hour logging days…the video shows how dirty it was cutting spruce.
Of course spruce or other softwood is messy with sap and lots of dust and after 3 straight days without cleaning maintenance it will be very dirty.
But normally a logger would clean it and air filter included after a 7 hour day. This would prevent fine wood dust from working past the over dirty air filter into the intake as the video showed.
So it’s very important to understand this problem.

We have to remember that fuel injected chainsaw
development goes all the way back to 1949 at Rasmus Wiig’s small Oslo factory “Norsk Sagbladd Fabrikk” with his 8.5kg semi diesel Comet Model A chainsaw.

Hi Fredrik,

thanks for the review, I’m going down town Tuesday after this so called easter break, to ask for one!

Dude!! It’s 80 cc NOT 80 cubic inches! No chainsaw typically available is measured in ci or cubic inches. 80 ci is 1311 cc. Double that and you pretty much have the same ‘cube’ capacity of a 5 cylinder Volvo. Now I know modern chainsaws are pretty potent but do you really think 2 of these MS 500i’s have as much ‘cubes’ (cubic inches or cubic centimetres) as a classic 5 cylinder Volvo?

Thank you again for the vision

kind regards
KKurt