1972 911t 2.4 (bosch factor)

[underdog911]

juststarting out in the porsche commuity.iown a 1972 911t 2.4 61,500 miles on engine,most of electrical has green corrision on it from corrision. going thru last two months cleaning wiring and other parts of car.it has the bosch mfi system.but wheni took off the altenator it hada marchal altenator it?
1. is this o.k.?
2. every where i look if has bosch system,only bosch parts can replace bosch parts?why is that?
3.out of curisosty,before duing anything stupid,whatwould happen if repaced bosch brain and coil with an msd system,or just an coil?
thank you verymuch for looking at my post and any help offered.
jimmy

[RickM]

I believe Marchal was an OEM supplier for alternators, just like Paris Rhone, Bosch and perhaps others. While Robert Bosch manufactured quite a bit for the electrical they were not the sole supplier.

There may be parts that are exclusive to Bosch as well.

[zithlord]

Marchal is correct.

John

[LakeCleElum]

Sounds like the car has been sitting awhile and you're doing the correct thing by cleaning up the connectors. Don't overlook the 14-pin connector that goes from the engine to the chassis near the left rear of the engine.

I'd not be swapping parts until you get it running and then proceed.....

[underdog911]

thankyou guy for the input,i will keep cleaning electrical fittings,it was just every
where i looked. use only bosch replacement parts on a bosch system.
thank you jimmy

[Early_S_Man]

Jimmy,

Are you having trouble with your ignition system, or just getting the engine started in gereral, or drivability/running quality issues after it starts?

My general response to your posed question #3 has been answered many, many times on this forum ...

Ignition Troubleshooting??????