502 MPI Intake and Injector Question
#11
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The intake is not. It is pre- 99, but someone prior to me modified it to fit the 99 injectors (smaller than the older ones that usually go into it).
seems that I need a new intake that will fit the injectors that are there (small in size). Per schematic it is 861300A2.
issue is I can’t find any and I have a new intake, but it is pre 99 and fit the bigger injectors only.
#14
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How can I fit a 861260T Injector into my 805233C manifold. The 805233 Manifold takes a bigger injector (805225)
Attached is photo of the 2 injectors. The small is what I have on my motor now (861260T), the big one (805225) is what fits into the manifold I have.

Attached is photo of the 2 injectors. The small is what I have on my motor now (861260T), the big one (805225) is what fits into the manifold I have.

#15
I have a ‘98 intake as well as a better than factory set of injectors. The intake isn’t in the best of shape but it did seal well using the factory Merc gaskets. Send me a PM if interested.
#16
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would your set up work with my computer? What if the injectors are not the same as what the computer is set for?
#18
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the studs of the intake was shaved down and injectors jellied into the hole. It worked for a season.
but now I am putting a new block into the boat and was going to change the intake to a new clean one and my mechanic saw this. Now I can’t find a intake that fits the smaller injectors.
#19
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From: KY
My original 502 motor 415 HP used MEFI-1, manifold 805223 and injectors 805225 (37 psi)
The motor was repowered 530 HP using a MEFI-3 with same intake and injectors (40 psi)
Either MEFI will work just make sure the fuel tables are done correctly when re-flashing
The motor was repowered 530 HP using a MEFI-3 with same intake and injectors (40 psi)
Either MEFI will work just make sure the fuel tables are done correctly when re-flashing
#20
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I really don’t want to deal with flashing and keep the current injectors that are with the motor. But I can’t find a intake to fit them

not sure if there is a adaptor or something to make it work?
looks like these injectors fit to a intake number 861300A2





