Batboard

I was recently asked to install a radio in a spray airplane. By the power plug, ant plug,and cord to the mic jack and the size of the bracket, it appears that it once had in it a GM or M series Motorola; My question is, will a M1225, or CM200 work with the interface already in place, for the helmet earphone audio, and helmet
mic audio? There is a sixteen pin plug wired in also, but it appears that there is just a jumper between two connections. You help would be appreciated. Thank You; Byron

Yes.

And the sixteen pin plug with the single jumper won't be necessary.

just a heads up there are potential legal issues you might run into if those radios are not TSO'd and you are not a certified A&P. More than likely you would get away with it, but if he digs a hole with that plane you would likely have the FAA/NTSB knocking on your door.

If the regs are an issue, as with the lagalities of using said radio in the plane, rig a portable for use instead, no connection to the aircraft power system, and no TSO as you should not be making any mods to the airframe.
People go air mobile all the time, without the FAA getting riled.
I take it that this 'install' was/is temporary, if not, then you will need to get in line with the rest and have the install done by the 'right' people and save future problems for yourself.
If the aircraft is inspected after you do the install, and there is no documentation as to who did it, and this means license and name and next of kin, they will not write it off or certify, but will probably hand the owner a fine, and ground the aircraft until the proper papers are filed.
Could you get away with using a CarQuest alternator on your Cessna? Sure.
Can you afford the fine if you can't produce the TSO regarding that alternator...probably not!
Just as with the medical field, sois the aviation industry....same parts, ten times the cost.
Funny, ALL bearings in specific alternators are identical, same company makes them, Timken does not have 'special' bearings, but since the govt. said they do, they do.

Thanks for the help; Byron

As a retired FAA licensed Avionics Technician, I have to agree with the previous post concerning following the regulations. Ever since 9-11, the FAA and the FSDO (Flight Standards District Office) inspectors really tightened rules and regulations about who does what and how to any aircraft. The seemingly simple task of replacing a Spectra dash mount radio in a Police Helicopter with an XTL5000 dash mount unit (same mount, same antenna connection and a OEM supplied adaptor cable for the accessory connector)took countless hours of filling out 337 forms and several inspections before approval was granted. Even worse, I had been doing this sort of thing for nearly 20 years with no problems, but they made significant changes to the rules and procedures after 9-11.

Glad I retired from all that madness.