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They used to use 16 to 1 mix in 1960s 2 stroke because they had brass parts that were fragile.

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What size is the retaining nuts holden the carburetor to engine

Bahhhaahah worried about the environment ??? Yes you’re using gas .. and cutting down Mother Nature 😂😂😂

I have used both saws , the 462 is in a different class it's also about $500 more in price, a better comparison would be between the 362 and the 400 , and both are in the same price ranges.

I have several 2 stroke engines some 40:1 and some 50:1. I've been running 45:1 for many years without problems. Far more important is fresh non-ethanol gas.

From my experince on a 462 when the dogs tuch the log it will BOG within the first 3 nichers or I have a hungry chain.

Actually the MS250 has 3.1 bhp so... it's more powerful. The only advantage of the MS251 is it's more fuel efficent and has less vibrations, but you actually are paying for it, it's a lie that the price is the same for both. So in conclusion: go with the MS250

I have emptied old gas and put new. I have changed spark plug, air filter and fuel filter. I have checked the plug spark. It is blue but seems weak. It still won't start. Any suggestions. BTW the plug does not get wet. I have put gas in the carburetor and even wet the plug. Still doesn't start.

Wizzer remix

I disagree, I own both, and the ms 170 has been alot more reliable and cuts just as quick, despite engine size.

The ms205 is the newer version of the 025. The 251 is the woke version of the ms250. My 025 is 32 years old and still going strong. I somehow don't think anyone will say that about the 251.

Horrible video. Some of the saws used where not the saws being reviewed and one was a Chinese knockoff. Is that oil or fuel stabilizer being added to the fuel tank? Next time leave out all the fluff and just leave in the in-depth looks at the saws which I do like. And give a human a job instead of robot guy to narrate.

Never, EVER use 50:1, but 40:1. Why? 50:1 is too little and 33:1 is too much. You're welcome.

Terrible computer voice. Left as soon as i typed this comment. Terrible.

I'm surprised that clutch cover didn't break with the tork you put on those nuts Sheesh!

The ms391 is complete junk.

pointless.... gap is 0.2 but might be upto 0.3

Thank you for the video. It really explains a lot. 👍👍

When we do not know , we do not know . Example : most do not know chain saws are HIGH MAINTENANCE , therefore it is essential to perform inspection BOTH before and after USE of the saw.

Which is better at altitude , I cut at about 10,000 feet .?

AI narration sucks.

Dont waste $1700 on a computerized saw that you can not work on! The chainsaw was perfected in the 90s. The dealers want you to buy computerized saws so that you have to run back to them cap in hand to fix it. I have a Stihl 044 that was made in the early 90s that has 5.4 hp at 14 pounds, and stil cuts and runs like a scalded ape. Thats not a huge leap in technology after over 30 years to get the non mtronic 462.

'50:1 increases efficiency. However, fuel consumption is high in this ratio.' How does this statement make sense?

Both are awesome saws.

For the cost of the 500i i just stick with 661 or the o88.. got 2 o66 that are almost 20 years old now that still kick ass.

You're talking about an MS251, BUT you're showing a 251c!!! Two different saws!!

What you don't say is that they are both extremely hard to start because they have a high compression. I have a 251 and am considering swapping it because of this. An inertia starter would help but it can't be converted.

What in the hell is a.carbuater??😂😂😂

Chainswor go brrr

The Ms391 has a decomp valve on it tho. I own one

251 зборка якої країни ?

462 is better, i wasn't impressed with the 500i at all, it's all top end and not a lot of torque

There's an actual test on TH-cam showing opposite results on temperature th-cam.com/video/9ywMl30_JPI/w-d-xo.html&ab_channel=Dave%27sSmallEngines

Both are amazing saws but as a tree business owner and every tree business owner I know will have multiple MS460 series saws in their arsenal.

Never heard of somone pruning firewood lol. Saying that .1cc is going to make a big difference shows your lack of knowledge. The 025 is hand down a better saw despite having less displacement.

3:35 oil in the gas tank💀

Lose the computer voice. That sucks, would’ve liked a good comparison video but couldn’t stand the first 10 seconds.

Well i found a MS 271 at the pawn shop today. Practically new for $350 flat. It will be my go to saw when i dont need the power of my 461 and 661

Seems obvious... new everything, but only works with direct injection. Poured carb leaner and rant like CRAZY! Had to unplug sparkplug.

Has Land H on top cover what’s it for

what's junk is these stupid AI generated reviews.... it's either that or whoever did this review has no kind of knowledge about a chainsaw. period..... totally useless

First of all you said the MS 250 has the advantage in terms of fuel capacity! Yet, the MS 251 gets better fuel efficiency by 20% so even though the tank is slightly smaller it gets much longer on a tank of fuel! To conclude I will simply say there is nothing worse than an uneducated person posting a video and giving uneducated answers

I run saw daily .if its not cutting it's not running. Im not concerned with a couple oz. Of fuel. Informative video

Best mini saw

Bar and chain eat

Ms 170 is a animal

Enough of this emissions bullshit. Every time I see models focused on emissions, I also see a drastic increase in complaints over power/efficiency, startup reliability, etc. These things are too expensive to keep f'n them up because of absurd over-reaching regulations and virtue signaling. Stop pushing that bullshit, a chainsaw is creating any notable greenhouse gasses. Also, is this AI reading? If not, learn how to say "carburetor".

One is metal one is plastic, both junk.

Ms 170 is a beast, never let me down but i realy take care of it to cut superalot of firewood 15 cords and more a year I have it 1 year and half and everything with this chainsaw no problems