Building a custom crankshaft for a McCulloch Pro Mac 850. Will it fit???

[@onestopfabshop3224]

Without KZbin, I wouldn't be fiddling with power saws either. I saw my first ported saw on KZbin, and I was hooked as well. To be truthful, my lifetime of experience has been on heavy on highway trucks. Had a trucking company for 10 years, I was an employee wrenching and driving before that. Then opened my shop in 2008 and added machining in 2018. I watched Leon from Leon's chainsaw parts and repair on KZbin get really frustrated with a little carburetor. You don't know frustration until a truck comes in off the road in the winter to do a clutch and there's a big PTO hanging off the bottom of the trans with salt water and slush raining and slopping down on you with the owner telling you, "I need that truck Monday morning and it's Friday night. A power saw will NEVER EVER frustrate me after going through that and much much more!! I ain't complaining mind you, it's the profession I chose, but as I get older it's getting harder that's for sure. Take care Tinman.

[@victoryfirst2878]

Nice work Tinman. I use tweezers to put in the needle bearings. The torque specs are easy to find in the Machinery's handbook. I like McCullochs using heavy-duty bearings. That is what keeps the saw together. One thing that get me about the McCullochs is that the extra effort needed to work on them. A bit on the extra steps to do side. But each saw manufacturers have their own quirks of assembly.

[@tylerdrummond4609]

lol when I noticed the last roller stuck to your nail, I'm thinking to myself, "NO....NOOOO" LOL Glad you caught it!

[@johncoleman2495]

I've always had the most success stacking the bearings in the rod 1/2s and using STP to stick them in place rather than grease.... And the STP works better cold(refrigerated) also much easier to clean out than grease and is an excellent 2 stroke assembly lube!

[@jeffreyrubish347]

Brian Gray (Mr. Mac Gray) is another good resource for Mcculloch info.

[@niggis76]

Brian know´s mac´s for sure and his nice guy!

[@stevenlaxton3618]

Collection videos are great...I'd love a run-down on your Collection and by the sound of we'd all love to see that buddy of yours' stable of saws too...I don't care of its guitars knives or powersaws....anybody that sinks their teeth into something enough to collect it is pretty awesome

[@hopefullyoutdoors8509]

I got an old pro mac 60 yesterday. It's gonna be a learning experience for sure

[@MrHuntermikey]

Born on Vancouver island and your correct. Walker’s Saw Shop is the best

[@simpleman4224]

Love seeing mods using different oem parts to make it go fast! Kinda reminds me of building a stroker out of the junkyard!👍👍👍👍🇺🇸🇺🇸🇺🇸🇺🇸🙏🙏🙏🙏

[@stevetheriault4164]

THANKS Dave for your generosity for helping out the TINMAN and Buckin ,I'm sure that will be one heck of a saw

[@gcrsmallengine8836]

Buddy… I’ve got an 850 crank if you need it let me know… it is yours!

[@neilmoore3856]

Maybe talk to some cart or bike builders about pipes with expantion chambers, just on a smaller scale. It could take some of your ported saws to another level.

[@KensSmallEngineRepair]

Saw a post on AS showing 65-70 Inch pounds on the Con rod bolts when oiled. I also flush the grease out with mix gas and re-torque them. Just my .02 Thanks for the video

[@onestopfabshop3224]

Speaking of using lighter parts, I had 2 junk Husqvarna saws giving to me. A 36 and a 141. I built the 141 but used the lighter flywheel from the 36, then did a little grinding on the 141 piston to make it lighter. I shaved off about 2 grams. I don't know if that will help anything but it can't hurt, I didn't grind in any stress areas. I really like tinkering with these saws even if they ain't 372's or 395's. It's still fun for me. Thanks for the inspiration.

[@sebastianleicht]

Very interresting! Thanks for showing!

[@stevetheriault4164]

My buddy had a 576 AUTOTUNE low hour saw the connecting rod sheered off under the wristpin never seen anything like it ,,have a good day TINMAN

[@wayupnort6271]

Tinman there’s a company called Millenium in Winnipeg that repairs and re-nicacils 2 stroke cylinders. They do nice work. Also, if you miss your numbers on those crank bearing bores a hair you can use a film of green cylindrical bonding loctite to lock them in place vs. moto-seal. Keep up the good work!!👍🏻

[@rchighfield1]

Can’t wait to see this one going!

[@lisashier5568]

Well now you can say Tinman saws ized! Looks like you have got things down pat out there in the country Tinman! What you don’t know you seem to figure out! Love the channel! ❤️

[@nwcanuck5069]

Franken Mac! Love it.

[@aaronweber1081]

372 with loose bar studs - can you make a video on repair options?

[@ozdatman]

Mac frankensaw on the cards. Sweet.

[@lyndonwortley6329]

AFAIK, Mac increased the number of fins on the flywheels to improve cooling...

[@jamesconnors9388]

Sounds to me like your well on your way to being a mac guy haha looking forward to the build buddy

[@Finom1]

Tinman, I was yelling at my screen that there was a needle bearing stuck to your finger!!!:)

[@yakbranson]

I was yelling also🤣

[@Piledriver2235]

Same... "don't wipe your finger, DONT WIPE YOUR FINGER!!!" 😆

[@TimberTramp]

There’s. Novel idea! serviceable rod and bearing

[@SOHN32]

Interior crank bolts are 55 to 60 in lbs. Light oiled rod bolts are 65 to 70 in lbs.

[@johnarnettsways.8758]

Very informative tinman. Wish I had you in North Carolina. I am trying to restore a couple gear driven saws. Ya it’s a different animal. Parts are very hard to get. Be kind bud. See you on the next video. 🌲🌲🌲

[@thesmallwoodlot433]

I am working on a gear drive saw myself, a “sears 647 G” ( David Bradley ah) so far, I have repaired the recoil starter, and had it kick-over on either, will have to rebuild the carburetor .

[@johnarnettsways.8758]

@@thesmallwoodlot433 mine is a model 47 Mac and a strunk eager beaver. Just getting started and it is going to be a big job. Thanks for your input

[@thesmallwoodlot433]

@@johnarnettsways.8758 you may want to get in touch with Dan, @ Kain Kustom Garage, here on youtube, he is a wealth of knowledge on old saws! As well! And remember “ a gear drive runs the other way , while a direct drive follows in line!” So a gear drive motor runs clockwise while a direct drive runs counter clockwise, during assembly of your recoil starters.

[@adamhanlon7346]

Awesome job fellow chainsaw brother in arms !

[@fearghalmorrissey2601]

Brilliant experiment 👏✍💪

[@AnDrEw122100]

I heard that a lot of guys don’t even mess with the transfers on saws , heard they’re really easy to screw up

[@tinmanssaws]

I recommend not touching the upper transfers for that reason. Lowers you can go hog wild.

[@alanmeyers3957]

I don’t see a lot of piston porting and scalloping, a lot of these timing numbers can be reached by modifying the piston.

[@tylerdrummond4609]

This is off topic, but what does the Dollar bill on the shelf represent? just curious! Also thanks for sharing your knowledge!

[@BourbonDrinker]

Did I miss the completion of the Husqvarna giveaway saw?

[@JTECH7766]

The procedure for the main bearings is to install half in the rod cap and half in the rod using Vaseline then install. The first time I did it I installed all on the crank which was a pain!

[@ozdatman]

No, 1 and 12.15 am here.

[@pm270100]

you will get there

[@steveking4966]

interesting can you space out the starter pawls?

[@jensenwilliam5434]

Thank you!!

[@rogerford4427]

Want to see that saw run when it is done. 😩

[@johnlincicum6390]

It's going to lose torque with the lighter flywheel and gain rpm. I believe the flywheels with more fins came on the electronic ignition saws and the less fins on the points saws.

[@alanmeyers3957]

Have you played around with heavier clutch springs to increase chain stall speed?

[@tinmanssaws]

I've done done a couple times.

[@bobbybooshay5576]

Hi tin man how you doing I I have a husky 350 that’s looks abit dull how would you go about brightening up the plastics on it thanks

[@gustavogartner3145]

Tengo un 850 en. Argentina....

[@codyroger9581]

50/50 chance the piston is oriented correct with the exhaust... or does it not matter?

[@crperformancetucker5065]

Do you think your bob weight on your crank will be off and the saw will vibrate now?

[@davidwillard7334]

Did Buckin ! Give ! You His ! Saw ! To ! Fix !!??

[@rdcustomdiecast]

i was shouting there a bearing still on your fingernail lol

[@no.step.on.snek.2423]

Lol you didnt drop thst last bearing.. it was stuck to your fingernail.. i was screaming at my phone for you to see it.. luckily it fell off and you seen it

[@tinmanssaws]

Lol yep

[@Nathanmr19771]

Aren’t the big ends on those fractured can’t remember?

[@JacksonHall611]

Yes they are fractured rods and Mac was nice enough to cast an alignment dot it the rod and cap.

[@Nathanmr19771]

I was throwing that out there in case he didn’t notice that.

[@JacksonHall611]

@@Nathanmr19771 that was a good idea I know ive missed simple things like that many times

[@neilmoore3856]

I find it easier for my sausage fingers to put the big end rod bearings in by using the grease but puting half on the rod end and other half on the cap.

[@MinusTheSparkPlugs]

If a guy ends up not using the other crank I've heard of guys drilling and tapping the end of the crank for a bolt with good success

[@MultiMoveman]

Dam. I just bought one of these for 10 dollars at a yard sale.

[@steelcityperformancesaws]

You had one stuck to your finger

[@SS-gk6rh]

АТОвці які патріоти .ХУНТУ ДО ВИЩОЇ

[@JacksonHall611]

The way you built it you save 190 grams

[@gustavogartner3145]

Tengo un 850 en. Argentina....