McCulloch Chain Saws

[Eccentric]

Fraser does the 'numberless' saw have a DSP (decomp) valve like your 'new' Mac? I can't check that # until I get home from work.

 

[paccity]

Fraser does the 'numberless' saw have a DSP (decomp) valve like your 'new' Mac? I can't check that # until I get home from work.

in box empty Aaron. on the other powerhead it has the decomp . looks real close but like i said no #'s.

 

[Eccentric]

had a bar that will go nicely with the 795. and a nos starter cover that i picked up at the little gtg on sat . Aaron asked to check the #'s on it, 63629- 2526. the funny thing about these yellow saws is i dug out another pwr head that looks the same as this saw but has no #'s on it at all.?

in box empty Aaron. on the other powerhead it has the decomp . looks real close but like i said no #'s.

Found 63629 as the number for a replacement cylinder assembly in a March 1966 dated IPL for the 795. As for the un-numbered mystery saw..............it has to be either a 795 or 797 since it has the DSP valve. You'll have to measure the bore. 2.218" will be a 795. 2.28" will be a 797. You could also measure the stroke using a straw through the spark plug hole. 1.635" will be a 795. 1.835" will be a 797. There are other things to look for to spot a 797 (vs a 795). I can't remember them off hand, but other guys here will be able to point them out.


Model Profile: 795

Model Profile: 797

 

[leeha]

had a bar that will go nicely with the 795. and a nos starter cover that i picked up at the little gtg on sat . Aaron asked to check the #'s on it, 63629- 2526. the funny thing about these yellow saws is i dug out another pwr head that looks the same as this saw but has no #'s on it at all.?

Fraser, Sweet lookin bar. It will compliment that 795 well.
The 63629 is a 795 saw. The other with no numbers i bet
will be a Super 797. Measure the bore through the exhaust port.
2.280 or more and you hit the lottery.




Lee

 

[fechtichmac]

Minimac 25

Today arrived,all parts there.
Engine seems to be seized but I have several replacements.
Regards!
E.View attachment 273599View attachment 273600View attachment 273601

 

[Nickolas]

Flatbacks & Tillotsons

I know there has been a lot of discussion on these carbs but digging through the site and reading a lot of older posts I see where a lot of guys remove the flatback carbs and replace them with Tillotson carbs. Apparently there are problems/issues with the flatbacks and that's why they get changed out for a Tilliotson HL model instead. What are you guys doing with those flatbacks? Send them my way if you don't want them I prefer a flatback over a tillotson carb any day. I don't see or have any problems with the ones I have and think they work quite well actually.

So what is the number one reason these carbs are swapped out for a Tillotson? Is it the price of the kit or are there issues with the saw running?


Nick

 

[cpr]

High-side metering chamber check balls getting stuck for one and difficult to source replacement parts for. Primer parts NLA for another. That said, I do run them.

 

[leeha]

I like the Flatbacks when they work. But seems like everytime
i rebuild one i'm into it a couple times before it's right. Kit's
are expensive and the primers are extinct so you have to prime
down the carb to start the saw. The Tilly HL is a great carb and
used in many, many saws. Kits are cheap, They have a choke
and run as good if not better than a flatback. JMO.




Lee

 

[sawbones]

Arriving this week while I was away, Electric Mac. 12" bar with the auto sharp chain and sharpener in working order. I had to mess with the oiler a bit to get it going but now it is in good working order. I thought it only fitting to have one 120 volt electric saw in the collection and now I can scratch that one off the list.


Mark

Mark you'll need a McCulloch generator to power that ElectriMac...

Bet he dont have a McWelder in his barn yet.

 

[Eccentric]

I know there has been a lot of discussion on these carbs but digging through the site and reading a lot of older posts I see where a lot of guys remove the flatback carbs and replace them with Tillotson carbs. Apparently there are problems/issues with the flatbacks and that's why they get changed out for a Tilliotson HL model instead. What are you guys doing with those flatbacks? Send them my way if you don't want them I prefer a flatback over a tillotson carb any day. I don't see or have any problems with the ones I have and think they work quite well actually.

So what is the number one reason these carbs are swapped out for a Tillotson? Is it the price of the kit or are there issues with the saw running?


Nick

I have at least 5 complete flatbacks that I'll trade for complete HL19, HL103, or HL63 carbs.

Two are choke type. The rest have primers. At least one of the primers works...

 

[fossil]

I like the Flatbacks when they work. But seems like everytime
i rebuild one i'm into it a couple times before it's right. Kit's
are expensive and the primers are extinct so you have to prime
down the carb to start the saw. The Tilly HL is a great carb and
used in many, many saws. Kits are cheap, They have a choke
and run as good if not better than a flatback. JMO.




Lee

Lee,

I have a flatback on my 380 which needs a kit and a Tillotson HL 166 from a parts saw. Is that carb too small for the 380? If it is, what Tillotson HL does work?

Thanks

Tim

 

[leeha]

Lee,

I have a flatback on my 380 which needs a kit and a Tillotson HL 166 from a parts saw. Is that carb too small for the 380? If it is, what Tillotson HL does work?

Thanks

Tim

I'm not to familiar with a 380 Tim. Doe's a 380 use
a primer or choke. If it has a choke is the choke in
the carb or body of the saw like some older mac's.
Compair the HL to the flatback. If they look the same
with the same functions it may work for you.
Post pic's of both carb's



Lee

 

[fossil]

I'm not to familiar with a 380 Tim. Doe's a 380 use
a primer or choke. If it has a choke is the choke in
the carb or body of the saw like some older mac's.
Compair the HL to the flatback. If they look the same
with the same functions it may work for you.
Post pic's of both carb's
Lee

I'll post some pics up later of the Tilly. The 380 is 87cc. The flatback on this one uses a primer. I posted a pic earlier of the wierd idle control device attached to it (ia kinkage).

 

[RandyMac]

I have at least 5 complete flatbacks that I'll trade for complete HL19, HL103, or HL63 carbs.

Two are choke type. The rest have primers. At least one of the primers works...

you got a deal.

 

[Eccentric]

A 380 is laid out just like a 250 or 300. Has a choke/primer button on the right side and the oiler button on the left.

I'm not familiar with an HL166. What parts saw is it on Tim? You will need the cast adaptor plate to run an HL on a front tank Mac such as a 380.

 

[Eccentric]

Tim you need an HL63 and the cast adaptor/spacer plate.

 

[Eccentric]

you got a deal.

Excellent. I'll gather up the flatbacks and give you a head count.

BTW-You have two of the saws that I removed these flatbacks from (and installed HL's on).

 

[fossil]

A 380 is laid out just like a 250 or 300. Has a choke/primer button on the right side and the oiler button on the left.

I'm not familiar with an HL166. What parts saw is it on Tim? You will need the cast adaptor plate to run an HL on a front tank Mac such as a 380.

The 166 is on an 08 Stihl concrete saw. Is the adaptor required so the carb will bolt up?

 

[RandyMac]

Excellent. I'll gather up the flatbacks and give you a head count.

BTW-You have two of the saws that I removed these flatbacks from (and installed HL's on).

I'm filling a box of stuff for you, lots of misc parts, maybe a few partly stripped parts saws. I found the driveside cover for that 3400.
Still have a good shot at getting that first full week in Feb. off.

 

[heimannm]

I visted a customer plant in north central IN today, one of the guys there has been promising for about a year to find a kart engine for me.

As I was getting ready to leave he called me back upstairs for a minute...

Now I have yet another project in the waiting.

Mark