MS661C Teardown and Failure Analysis

[@luvingfully]

I mix 40:1 for the reasons you state in this video. I switched to Honda HP2 oil as a result of your testing and opened up my third pint last week. I like it. Thank you very much!

[@westcoastsaw1368]

Never understood why they made that intake boot so stiff on 661 they always seem to ter down around that clamp Another good video Richard

[@richardflagg3084]

Thanks you!

[@chrischiampo7647]

I’ve Replaced A Few Of Those Boots on The 661’s The AV Mounts Get Worn and The Tank/Carb And The Crankcase Pull Apart And Rip The Boot Especially If The Saw Gets Stuck in a Cut and The Owner Pulls Hard on The Handle To Get The Saw Out 😬😬😬

[@marriedwithsmallengines]

Great video Richard! You are full of excellent information! 😊

[@patrickvennard838]

If I lived in the US I would definitely bring my saws to you you always do a great job.

[@74willy81]

Another great video Richard, always so nice to have you share your knowledge and insight. I realize that producing these videos takes a lot of time and effort, greatly appreciated. Thank you! I honestly can't understand why you haven't broken the 100,000 subscriber threshold yet. Your channel is an undiscovered gem!

[@richardflagg3084]

Like I said KZbin is tough. Slow and steady

[@Mike_Mike_0]

Rich good maintenance tips 😊😊😊 Great experience with these engimes ❤❤❤

[@aaronpowell4885]

For the average operator under most circumstances, i know m-tronic and autotune are a godsend. But their ability to mask leaks so well is one downside IMO. Glad the cylinder cleaned up beautifully!

[@oakiewoodsman]

This cylinder cleaned up really well AP!

[@coreyhorrocks3504]

Thanks for the vids Richard I love your level of detail

[@alanwatts9232]

Great stuff, thanks for the video, glad you could save the cylinder.

[@kbittorf335]

I know I am fortunate to buy Schaeffer‘s in this area retail for 30 cents per ounce. I use the boat oil 32:1 with 91 E-free. That cylinder cleaned up great! I guess that‘s one downside to using a different piston once something happens down the road and you‘re SOL. Great job!👍

[@steveriggenbach90]

Red armour works great. Hate to see that happen. Glad some things were salvageable.

[@crazyfeller5704]

👍👍👍

[@902hand7]

Crazy that she'd even run with the big a tear in the boot. Score 1 for m-tronic and 0 for the piston. 😉😉

[@ricksanchez7459]

You gotta treat the new av bushings gentle, they making em light and comfortable as possible.

[@jimssawsnstuff8903]

Yeh, good to add a limiter to the spring travel so guys don’t rip boots when they reef on the saw when it gets pinched. Would you run just the top ring? Lots of guys do that…

[@richardflagg3084]

If I had to, yes. There's enough of the cylinder wall there to run both.

[@johngardner3020]

Is that torn intake boot issue more prevalent on the 661 than other saws or is the issue common in all larger saws subjected to heavy use?

[@steveriggenbach90]

Please show you do your flush. Thanks

[@christianh5839]

Hey Richard, can you try out some Aspen 2?

[@sergep4965]

hello richard Another very interesting video thank you I wanted to ask you for a husqvarna 550 xp I do not find in france amsoil saber that you recommend as well as the red armor but echo power blind yes semi-synthetic that does not carbon oil husqvarna jaso FD the piston side escape is horrible black not so clean that it oil xp + with gasoline pump by aspen it is great even with a dirty oil , but it costs expensive to use so I panache can be trusted to echo power blind semi synthesis oil for the 550 xp? Thank you in advance for future response

[@richardflagg3084]

Yes. 25ml per liter. Echo Power blend should do a very good job.

[@sergep4965]

Hello Richard thank you very much for the answer

[@saltrock9642]

Is that CT3’s 400 you workin on?

[@richardflagg3084]

Yup

[@tedneitzel]

So all I know is shit happens! What I also know is it will be right before it leaves your shop!

[@larrywarner9314]

32:1 is how I mix

[@Eganperformancesaws]

I’ve got a weisco 661 piston if you want/need it

[@richardflagg3084]

Thanks Jason, I appreciate the offer. Port work was originally done with a factory piston. I never got around to the additional mods after the Wiseco was installed.

[@MOTA_KRAMPUS]

I do 45:1, hope you restore it to old glory.

[@dujeamizic3588]

I mix 50:1