Mcculloch Super 10 10 Specs

McCulloch 2-CYCLE ENGINES
Listed below are the various models of the McCulloch Engines and some data regarding them.
Model Engine Use Bore Stroke Displacement Carburetor Spark Plug Type Spark Plug Gap
MC-2 Racing 2.165 1.635 6.05 Tillotson Series HL *J-6J or AC M-44C 0.025
MC-5 Racing 2.125 1.375 4.9 Tillotson Series HL J-6J or AC M-44C 0.025
MC-6 Racing 2.125 1.500 5.3 Tillotson Series HL J-6J or AC M-44C 0.025
MC-7 Racing 2.165 1.635 6.05 Tillotson Series HL J-6J or AC M-44C 0.025
MC-8 Racing 2.165 1.375 4.9 Tillotson Series HL J-6J or AC M-44C 0.025
MC-9 Racing 2.165 1.375 4.9 Tillotson Series HL J-6J or AC M-44C 0.025
MC-10 Racing 2.125 1.500 5.3 Tillotson Series HL J-6J or AC M-44C 0.025
MC-20 Racing 2.125 1.635 5.8 Tillotson Series HL J-6J or AC M-44C 0.025
MC-30 Racing 2.165 1.635 6.05 Tillotson Series HL J-6J or AC M-44C 0.025
MC-40 Racing 2.165 1.635 6.05 Tillotson Series HL J-6J or AC M-44C 0.025
MC-45 Racing 2.165 1.635 6.05 Tillotson Series HL J-6J or AC M-44C 0.025
MC-70 Racing 2.217 1.835 7.08 Tillotson Series HL J-6J or AC M-44C 0.025
MC-75 Racing 2.250 1.835 7.29 Tillotson Series HL J-6J or AC M-44C 0.025
*Spark Plug Data
Operating Condition: Average Driving
Champion Plug Number = J-6J
AC Plug Number = M-44C
Operating Condition: Light Racing
Champion Plug Number = J-4J
AC Plug Number = M-42k
(SOURCE: Some of the data are from “Small Engines Service Manual”)
And heres a new more detailed chart maybe a little easier to use
Mcculloch standard series go kart motors
[attachment=105]
Mcculloch super series motors below
[attachment=108]
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[url=https://web.archive.org/web/20100215000000/http://macbobaust.com/bores.html][/url][/size]
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mcbobs old chart
Bores , strokes and capacities of McCulloch Chainsaws
Crankshaft PTO style
1. Tapered with keyway
2. Tapered without keyway
3. Stepped
[b][b]Model .............Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end
[/b]
1-40...........................50659...............2.125'/ 1.375'...............55009............80cc or 4.9 cu/in.........................3
1-41...........................50659...................................................55009...............................................................3
1-42...........................50659...................................................55009...............................................................3
1-43...........................50659...................................................55009...............................................................3
1-45...........................50659...................................................55009...............................................................3.
1-46...........................50659...................................................55009...............................................................3.
[b]Model .............Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end[/b]
1-50...........................50659..............2.125'/ 1.375............ 55009............80cc or 4.9 cu/in...............................3
1-51...........................50959...............................................55009....................................................................3
1-52...........................50959...............................................55009....................................................................3
1-53...........................57830..............2.125'/ 1.375..............55009....................................................................3
1-60...........................50756..............2.125'/ 1.375.............55009............80cc or 4.9 cu/in.............................. 3
1-61...........................50756...................................................55009.............80cc or 4.9 cu/in .........................3
1-62...........................50756...................................................55009.............80cc or 4.9 cu/in .........................1
1-63...........................50756...................................................55009.............80cc or 4.9 cu/in .........................1[/b]


[b][b][b]Model .............Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end[/b]
[/b][/b]


1-70...................................................2.125'/ 1.50.......................................90.14cc or 5.5cu/in......................1
1-71...............................................................................................................................................................1
1-72............................................................................................................................................................
1-75...................................................2.125'/ 1.625........................,...........95cc or 5.8 cu/in.......................
1-76...........................58128...............2.165'/ 1.635................48905............99cc or 6.04cu/in..........................1
[b][b]Model ............Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end
[/b]
1-80............................55257..............2.125'/ 1.500...............55009..............87cc or 5.3 cu/in......................1
1-81............................55756.................................................55009.............................................................1
1-82............................57756.................................................55009.............................................................1
1-85............................58128..............2.125'/ 1.625................48905...............95cc or 5.8 cu/in....................1
1-86............................58128..............2.165'/ 1.635................48905...............99cc or 6.04 cu/in..................1
Mac 15.......................50659a............2.125'/1.375................47903................80cc or 4.9 cu/in.......................3
D-30...........................50025..............2.125'/1.375................50015................80cc or 4.9 cu/in ......................3
D-36...........................50210..............2.125'/1.375................55009................80cc or 4.9 cu/in ......................3
D-44...........................51225..............2.00'/ 1.375..................51220..............72cc or 4.4 cu/in........................1
Super 44..........................................2.125'/ 1.375........................................80cc or 4.9 cu/in.......................1
Super 44a..................55257.............2.125'/ 1.50...................55010..............90.14cc or 5.5 cu/in...................1
D-45.................................................2.125'/ 1.375........................................80cc or 4.9 cu/in
Super 55....................55005.............2.125'/ 1.375.................55010..............80cc or 4.9 cu/in........................1
Super 55a.....................................................................................................................................................1
Model ............Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end
Pro Mac 105...............89222.............2.250'/ 1.635.................88623..........106.5cc or 6.5 cu/in.......................2
SuperPro 105.............89222..................................................88623...............................................................2
CP125.........................69346.............2.280'/ 1.835.................69250.............123cc or 7.5 cu/in........................2
CP125s.......................69346.............2.280'/ 1.835.................69250.................................................................2
Super Pro 125............85476.............2.280'/ 1.835.................85606.................................................................2
Super Pro 125c..........85476.............2.280'/ 1.835 ................88623.................................................................2[/b]

Model .................Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end
200.............................50659..............2.125'/ 1.375...............55009a.............80cc or 4.9 cu/in.......................3
250.............................50659a............2.125'/ 1.375...............47782a.............80cc or 4.9 cu/in.......................1
250 late......................50659a.............2.125'/ 1.500..............47903...............90.14cc or 5.5 cu/in..................1
Super 250...................60313..............2.125'/ 1.500..............47903...............90.14cc or 5.5 cu/in...................1
Super 250 ..................50659a............2.125'/ 1.375..............47782a.............80cc or 4.9 cu/in........................1
300.............................60313..............2.125'/ 1.50.................47903..............90.14cc or 5.5 cu/in....................1
380.............................60313..............2.125'/ 1.50.................47782a............90.14cc or 5.5 cu/in....................1
380a...........................60313..............2.125'/ 1.50.................47782a............90.14cc or 5.5 cu/in ...................1
440.............................60724..............2.125'/ 1.50.................47782a............90.14cc or 5.5 cu/in ...................1
450.............................60313..............2.125'/ 1.50.................47903............. 90.14 cc or 5.5 cu/in ..................1

[b][b]Model ............Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end[/b]
550............................64440...............2.165'/ 1.635................47903............99cc or 6.03 cu/in.......................1
Super 550..................63440..............2.217'/ 1.635................47903...........103cc or 6.3 cu/in.........................1
640............................50756a..............2.125'/ 1.375................47903.........80cc or 4.9 cu/in...........................1
650............................61860................2.125'/ 1.50.................47903..........90.14cc or 5.5 cu/in......................3
660............................61860................2.125'/ 1.50.................47903..........90.14cc or 5.5 cu/in......................3
740............................58128................2.165'/ 1.635...............47782a...........99cc or 6.04 cu/in......................1
790.....................................................2.217'/ 1.635...................................103cc or 6.3 cu/in........................1
795............................58128...................................................47903...........103cc or 6.3 cu/in........................1
797............................66010.................2.280'/ 1.835...............66049...........123cc or 7.5 cu/in.......................1
Super 797...........................................2.280'/ 1.835...................................123cc or 7.5 cu/in ......................1
840............................58132..................2.165'/ 1.635.............47782a...........99cc or 6.04 cu/in......................1
890............................58128..................2.217'/ 1.635.............47782a...........103cc or 6.3 cu/in......................1
895............................58128..................2.217'/ 1.635.............47903.............103cc or 6.3 cu/in......................1
895c..........................89222..................2.217'/ 1.635.............88623.............103cc or 6.3 cu/in......................2
[/b]


1. Tapered with keyway
2. Tapered without keyway
3. Stepped

McCulloch Kart Engines ...Bore and stroke.
Super /101 series
[b][b]Model ..........Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end
[/b]
Mc 10.................55257../..48696 .........2.125'/ 1.50.........................................90.14cc or 5.5 cu/in....................1
Mc 20.................58128 ......................2.125'/ 1.635.........................................................5.8 cu/in....................1
Mc 30.................58128.......................2.165'/ 1.635.........................................106.5 or 6.05 cu/in......................1
Mc 40.................47751.......................2.165'/ 1.635.........................................................6.05 cu/in...................1
Mc 45.................58128.......................2.165'/ 1.635.........................................................6.05 cu/in...................1
Mc 70.................47798.......................2.217'/ 1.835.........................................................7.08 cu/in...................1
Mc 75.................47798a.....................2.250'/ 1.835.........................................................7.29 cu/in...................1
Mc 100/ 1966......47798a.....................2.250'/ 1.835.........................................................7.29 cu/in....................1
Mc 101/ 1967......68898.......................2.280'/ 1.835..............66049..................123cc or...7.5 cu/in....................1
Mc 101a.............69250.......................2.280'/ 1.835..............66049..................................7.5 cu/in
Mc 101aa 1972....69346......................2.280'/ 1.835........................................................7.5 cu/in
Mc 101b 1974....69346......................2.280'/ 1.835..............66049.................................7.5 cu/in....note 90872 ?
Mc 101c...1969....69346......................2.280'/ 1.835..............66049.................................7.5 cu/in
Mc 101d...1971.....69346.....................2.280'/ 1.835..............69250.................................7.5 cu/in
Mc 101 mc 1973...69346.....................2.280'/ 1.835........................................................7.5 cu/in[/b]

Mc Culloch 90 series engines
[b][b]Model ..........Crankshaft No ..........Bore/stroke...........Conrod No............Capacity......................Crank pto end
[/b]
MC5
1960.........................50756..............2.125/1.375.................55009..................4.9........................................1
MC6
1961.........................48744..............2.125/1.500..................55009..................5.3.......................................1
MC7
1962.........................48586..............2.165/1.635..................48905................6.05.......................................1
MC8
1963.........................48586b............2.165/1.635..................47782................6.05.......................................1
MC9
1964.........................48586c............2.165/1.635..................47903................6.05.......................................1
MC90
1966..........................48586c...........2.165/1.635..................47903................6.05.......................................1
MC91
1966..........................48586c............2.165/1.635..................47903...............6.05.......................................1
91A...........................48586c............2.165/1.635..................47903...............6.05.......................................1
1968
91B...........................48586c............2.165/1.635..................47903...............6.05.......................................1
1970
91B/1........................48586c............2.165/1.635...................47903...............6.05......................................1
1970
91C............................48586c...........2.165/1.635...................47903..............6.05.......................................1
1972
91M/C........................89140............2.165/1.635...................47903...............6.05...............Straight grove and key
1973
MC92.........................91085............2.165/1.635...................47903...............6.05......................................2
1974
MC93.........................91085a..........2.165/1.635...................47903...............6.05......................................2
1977
Footnote this list has been compiled from my vaste array of Mc IPLS and Mike Acres excellent chainsaw site
[/b]

Engine Capacities of McCulloch Two Man Chainsaws
12-25a .......1948 - 49 .......... 130cc ... 2.250 in. (57mm) x 2.0 in. (51mm)
5-49 .......... 1949 - 52 .......... 130cc ... 2.250 in. (57mm x 2.0 in. (51mm)
7-55 ........... 1951 - 53 ......... 161cc ... 2.50 in. (63.5mm) x 2.00 in. (51mm)
99 .............. 1954 - 63 ......... 161cc ... 2.50 in. (63.5mm) x 2.00 in. (51mm)
1-92 ........... 1961 - 62 ......... 103cc ... 2.217 in. (56.3mm) x 1.635 in. (41.5mm)
1-93 ........... 1962 - 63 ......... 103cc ... 2.217 in. (56.3mm) x 1.635 in. (41.5mm)
940 ............ 1963 - 71 ......... 103cc ... 2.217 in. (56.3mm) x 1.635 in. (41.5mm)

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McCulloch 1-52 Chain Saw Parts List Download Now; McCulloch 250 Chain Saw Service - Repair Guide Download Now; McCulloch MAC 2-10 Chain Saw Owners & Operators Manual Download Now; McCulloch Power Mac 310, 320, 330, 340 Owners, Repair, Parts Download Now; McCulloch 610 / 650 Chain Saw Owners Manual Download Now; McCulloch 610 & 650 Service - Repair Guide Download Now. Mcculloch Pro Mac 10-10, 55, 60, 555, 570, 610, 650, 700, 800, 805, 850, 1010S, 5700, 8200, Super Pro 60, 70, 80, 81 And Timber Bear Rewind Starter Spring.

1959 - McCulloch's Entry into Kart Racing

Mcculloch Super 10-10 Specs

Many of you already know that McCulloch officially entered into the kart racing engine business in 1959 with the introduction of the MC-10. The following is an article (slightly edited) that appeared in the Feb 1960 issue of 'Quarter Midget & Karting World' magazine. (The magazine transitioned later that year into 'Karting World', one of the most fondly remembered magazines from the early days of karting.) The article, which highlights the tribulations of Mac's early years in the business, is both historical and, in some ways, hysterical. Enough from me - here's the article - Bob.

Part I: Kart Engine Policy

Mcculloch Super 10 10 Specs

The news filtering down through the karting grapevine across the country has confirmed what we have already seen with our own eyes. There is no question now that the McCulloch MC-10 engine clearly dominates the Super A and Super B classes. And already the rumor mill is bubbling over whether McCulloch will put out a similar engine for Modified A and perhaps other classes. These rumors stem from the many kart people who don’t understand why McCulloch, in view of the success of the MC-10, doesn’t quickly convert some of their other engine lines to kart use.


The McCulloch I-70 chain saw. Its Super 55A engine later became, with minor changes, the MC-10. The middle image is what an adapted Super 55A
looked likemounted to a kart frame. Looks like homemade exhaust header. In the 3rd photo, one of the first changes can be seen - the gas tank arrangement.
The old tank was cumbersome and restricted the air flow to the carburetor.

While this is an understandable assumption on the part of the karter, it nevertheless reflects only one side of the story. It would seem wise, in the interest of overall understanding, to give the manufacturer’s view point as we understand it.

What the karter fails to realize is that while karting is a fast growing sport, it represents only a small drop in the McCulloch business bucket. Let’s put it this way – McCulloch produces literally thousands of engines per month, only a small fraction of which is earmarked for karting. The bulk of McCulloch’s business continues to be the production of chain saw engines.

'There is no question now that the McCulloch MC-10
engine clearly dominates the Super A and Super B classes.'

Typical of any well established firm, McCulloch has a widespread network of wholesale distributors. Each distributor has a franchised territory in which he seta up a number of dealers to sell and service McCulloch chain saws. Each dealer, in turn, covers a specific area as determined by the amount of sales and service in that area. Bear in mind that this sales and service organization has been set up with the chain saw business in mind. Then – whoosh – along comes the advent of our our little karts and the rapid acceptance of McCulloch engines. This brings a new source of business for McCulloch Motors. While any new business is a blessing, this blessing, like many, comes with strings attached - problems of which the average karter is unaware. Let’s look at how some of these problems came about and then speculate on their possible outcome.


One of the first changes early users (of the Mac chainsaw engine) made was to remove the transmission, clutch and recoil assembly.
The extra HP and reduced weight boosted this little kart to a quick win in its class. This second pic shows a McCulloch chain saw
dealership complete with Buick parked in front.

Mcculloch Mac 10 10 Specs

At first, the karter adapted the complete saw unit (less, of course, blade and chain) to his little buzz-buggy. This was an expensive installation, but produced good results and the karter was happy. Happy, that is, until he ran into a McCulloch powered kart in which the chain saw unit had been stripped down to its essential component – the powerhead. Gone were the transmission, clutch and housing, and gone too the power loss from the gear train. This stripped down engine (indeed the forerunner of the MC-10) whipped everything in its class including the other McCullochs. The clamor immediately went up for the factory to produce and make available these powerhead units. To meet this demand almost overnight, the factory was faced with several immediate problems. A new carburetor adaptor had to be made (the old one was part of the gas tank) and the head, cooling shroud and fan housing had to be diverted from the “44” engine line. Different packaging had to be worked out, to say nothing of interrupting and changing the assembly lines to produce these units. The McCulloch people took these problems in stride and soon the MC-10’s were being distributed to kart manufacturers. McCulloch’s problems, however, had only just begun