Gut’N a N Front Mount COIL, To add a external round can coil Start by removing the four push/pin rivets from the top, these are spiraled and will self unscrew when a little force is applied to the under side of the cap. I spec there are some that have a screw driver slot so use the slot to un screw the retain’n pins. Lift the top cover and cut the thin wire from the primary connection as close to the coil as possible Now the fun begins. The ones I have gutted have been filled with Tar, I use a hair dryer or heat gun and heat the coil case, the tar will melt. Remove as much as possible so you can remove the coil with out damaging the lead that goes to the tab on the bottom side. Cut that leads off as close to the coil as possible. I then soak the coil case over night in a can of gas or mineral sprits, gas works best. If the case is not cracked you can fill the case with gas and let it soak. Next day with a brush clean the case spic and span. I use Muratic acid and clean the two wires left hanging in the coil base and the one wire in the coil cap. I use a 3ft length of copper core plug wire and solider it to the wire that connects to the front flat tab of the coil base on the inside. Some do not leave you much to deal with so I strip the copper core plug wire about 2” and spiral the naked copper wire around a nail to make a springy look’s lead. I place it all the way down in the cavity of the coil base and solider. After it cools do a pull test, if you were lucky enuff to have plenty to wire to work with no need to push the coil wire lead all the way down. I pack dielectric Tune-Up grease around the lead all the way down to the base, don’t B skeered more is better. Now drill you hole in the cap for the coil wire. Next solider a 8 to 10” 14/16 gauge automotive electric wire to the center springy looking thingy. If you plan the reuse the original gasket install it now, Clean, strip and coil the same as you did the coil wire. Solider it to the cap terminal wire. Coat with Dielectric Tune-Up Grease. Permatex part # 22058 you can find it at a automotive parts store. This step is optional, fill ½ to ¾ full of 100% silicon. If you ever need to go back into it gas will dissolve the silicon, the dielectric grease will keep the silicon from sticking to the wires and protect it from the silicon and moisture. Install the cap, seal the coil wire, tap the rivets back in. If you are using a 12V system get a NAPA IC14SB coil, wire it direct no resistor needed. If you are 6Vs use a 6V coil no resistor needed, sorry don’t know the part # but a coil for a 50 to 52 8N side mount coil is what you need. No resistor needed. No special points are condenser needed. You will have to use your imagination and mount and wire the replacement 12 or 6v coil. I have seen a picture of a replacement coil that had been filled with a hard plastic filler. Once the top of the coil was dug out a little the wires for the connections were exposed and no need to dig out the old coil. Just trace and connect. You will need a boot to go over the coil wire and over the top terminal of the replacement coil and a brass end to go on the coil wire. These parts come in a elcheap-o plug wire kit # CPN-12259 sold at farm and fleet or you favorit tractor parts store. 12 to 15 bucks. Comes with all the parts needed to rewire your ignition and a few extra parts. Strip the coil wire about ½ to expose the copper strain, once I cut the insulation I twist it so it will twist the copper strain then while twisting it of. Use a needle to open up the hole in the brass clip and push the copper strain threw it. Solider the copper strain to the brass clip, Cut off access This is important cause most plug wire problems are from a bad connection at the plug wire ends. Lube with Dielectric grease install till it locks firmly in the

http://www.grandvalleytractor.com/Products/products.html 

I have not verified the information below, I found it on the web, and didn't want to loose it. 

http://mgaguru.com/mgtech/ignition/ig110.htm

The MGA With An Attitude

MGAguru.com

MGAguru.com

IGNITION COIL Cross Reference Numbers - IG-110

This information is posted in the interest of local source and possibly saving some money. The spark coil required for the non-ballasted MG ignition system is a common type widely used around the world. These should be available at any local auto parts store, and lots of other kinds of motorized equipment dealers. This is an extensive list of coils that do not require a ballast resistor and can be installed with no modifications necessary to the wiring harness.

Beware that prices vary considerably. I bought a NAPA IC64 coil in April 2004, list price $62.50 discounted to $40.00. NAPAonline.com lists IC14SB for a meager $17.99 (April 2007). When I needed one for my lawn tractor I found a John Deere AT10399 on-line for $14.95, and it works just as well in an MG. Maximum voltage output could be anywhere from 17,000 volts nominal with a small spark plug gap up to 55,000 volts with a large plug gap and high output coil. There will be far more part numbers that are not listed here, as I have not listed all of the auto manufacturers (missing Ford and GM and MG for instance)

AC-Delco U515 Alfa Romeo 510897 British Leyland UKC3555 BMW 12131-357-296 12131-359-637 Borg-Warner E30M E37 E40 Bosch (German) 00 012 (blue) 00 015 (blue) 00 019 00 021 (black) 00 044 Caterpillar 4M1467 7B4496 631196 Chrysler (MOPAR) 200574 200611 200691 924053 1626875 1658432 1658433 1688210 1843324 2095338 MD001800 MD001804 Clark 887408 2503976 Crane FireBall PS20 (black) PS40 (chrome) Delco-Remy 1115032 1115033 1115043 1115046 1115048 1115052 1115056 1115057 1115058 1115060 1115061 1115062 1115064 1115065 1115066 1115068 1115072 Fiat 1078 4061050 4071394 4158493 4384184

Honda 30500-634-015 30500-634-671 International 368893-R91 368402-R91 368402-R92 395331-R91 395331-R92 396547-R92 396547-R93 3063671-R91 J.C.Whitney ZX075527P John Deere AT10399 Lucas 80 5002 80 5012 80 5015 45020A 45074 45075 45166 45214 CL 1 CL 2 CL 71 CL 101 CL 102 DLB 101 DLJ 102 DLJ 203 Moss Motors 543-020 (screw in) 143-200 (Lucas sport coil) NAPA IC14 IC14SB IC64 Niehoff (Advance Auto Parts) AL178 DR180 WA752 Nissan (Datsun) 22433-14800 22433-14805 22433-14806 22433-14811 22433-14815 22433-14816 22433-14900 22433-14905 22433-31300 22433-31303 22433-58000 22433-78500 22433-78510 22433-79011 22433-79012 22433-L1110 22433-L1610 22433-L1611 22433-L6800 22433-L6801 Pertronix Flame Thrower 40501 (chrome, oil) 40511 (black, oil) 40611 (black, epoxy)

Prestolite 5-10 200691 CAS-4012-1 CAS-4110-1 Saab 8528328 8804783 Sorensen GC-521 SC-1A SC-1X SC-27X Standard-Hygrade UC-15 UC-15X UC-500-12 UF-3 Subaru 82988-2800 82988-4110 82988-4112 82988-6102 98136-0005 98136-0007 98251-1535 98251-35080 Toyota 90919-02002 90919-02004 90919-02007 90919-02008 90919-02013 90919-02014 90919-02015 90919-02016 90919-02019 90919-02020 90919-02026 90919-02027 90919-02030 90919-02031 90919-02043 90919-02107 Triumph GDC106 UKC3555 Victoria British 8-288 (sport coil) 8-627 (screw lead) 8-285 push lead) 10-420 (Bosh blue) 10-421 (Bosh red) 10-538 (Flame Thrower black) 10-539 (Flame Thrower chrome) Volkswagen/Audi 021 905 115A 043 905 115A 043 905 115B 043 905 115C Volvo 35254 3638411-3 Wells LU800

This 12-volt non-balasted ignition coil is compatible with the following applications:

AMC- 3154627; 3161081; 3170249; 3173687.

CATERPILLAR NUMBERS: 49884, 62611, 353805, 631196

CLARK NUMBERS: 722593, 881097, 887408, 940104, 940140, 1728993, 1800958, 2503976

GM- 1115033; 1115043; 1115066; 1115091; 1115159, 60; D-501; D-504; D-513; U-501.Ford- DOPF 12029 A; DGC-10.

HYSTER NUMBERS: 72785, 119371, 199371, 231587, 248264, 314762, 326497, 328394, 1374918

KALMAR-AC NUMBERS: 74004755, 74061737, 74515665, 74516129, 74889580, 74920332, 74942392

KOMATSU NUMBERS: 22433-14816, 22433-L1110, TJ90919-02015

NISSAN NUMBERS: 22433-14800, 22433-14805, 22433-14806, 22433-14815, 22433-14816, 22433-L11110, 22433-L1610, 22433-L1611, 22433-L6800, 22433-L6801

Prestolite- 5-10; CAG-4001; CAF-4002; CAG-4002; CAG-4003; CAF-4004; CAF-4005; CM-4007; CAB-6001; CCM-6001; 200562; 200574.

TCM NUMBERS: 22192-42351, N-22433-14800, N-22433-14805, N-22433-14811, N-22433-14815, N-22433-14816, N-22433-79011, N-22433-79012, N-22433-L1110

TOYOTA NUMBERS: 80919-76023-71, 90919-02002, 90919-02004, 90919-02008, 90919-02014, 90919-02015, 90919-02016

VW/Bosch- 311 905 115, A; 0 221 102 056; 0 221 102 057; 0 221 114 006; 0 221 114 007; 0 221 114 008; 0 221 114 009; 0 221 102 003.

YALE NUMBERS: 059990600, 063194100, 118496300, 138794100, 220012305, 220050922, 220052059, 501283800, 512739801, 519584400, 900324300, 906189300

American LaFrance- 1948-1964 Autocar- 1944-1958 Alfa Romeo- 1956-1959 Aston Martin- 1951-1966 Allis Chalmers- 1957-1964 Austin- 1948-1971 Austin Healey- 1965-1970 Available- 1938-1952 Brockway-1944-1971 Case, J.I.- 1958-1968 Cockshutt- 1957-1961 Cricket-1971-1972 Dart- 1945-1959 Datsun- 1971-1973 Diamond T- 1946-1961 Divco- 1963-1965 Dodge Truck- 1956-1958 Fiat-1958-1968 Federal- 1947-1953 Flxible Bus-1944-1964 Ford- 1963-1969 Ford (English)- 1951-1969 FWD- 1948-1951 & 1957-1970 GMC- 1950-1955 & 1960-1961 Harvester Implement- 1958-1959 Hillman- 1940-1969 Humber- 1951-1972 IHC- 1938-1966 Jaguar- 1957-1971

John Deere- 1952-1966 Kenworth- 1949-1962 Mack- 1944-1971 Massey-Ferguson- 1955-1963 Mercedez-Benz- 1952-1965 MG- 1951-1972 Minneapolis-Moline- 1953-1965 Morgan- 1951-1969 Morris- 1949-1970 Motec- 1962 New Holland- 1959-1972 Oliver-1950-1964 Oshkosh- 1948-1970 Peugeot- 1957-1970 Plymouth- 1956-1959 Porsche- 1965-1970 Rambler- 1959-1966 Renault- 1959-1968 Reo- 1944-1966 Simca- 1955-1970 Studebaker- 1959 Studebaker Truck- 1955-1960 Sunbeam- 1969-1970 & 1972-1973 Toyota- 1974 Triumph- 1950-1972 Volkswagen- 1963-1974 Volvo- 1946-1956 & 1965-1971 White- 1944-1959 Wisconsin Engine- 1959-1972