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Mercruiser ICM (ignition module)5.7

T

ThunderCraft94

New member
So it looks like my ICM (ignition module) is no good. Mine attaches to the outside of the distributor, not on riser.
Ok so I have a chance to pick one up at a really good price that came from a 4.3 and its marked V8-22
In the list below I see 4 possible module, how do I tell which one is right for me

1987-1993MCM 4.3L Engines
V6-14​
15247A1​
15247T01​
5.0L, 5.7L & 7.4L Engines
V8-24​
15248A1​
15248T01​
5.0L & 5.7L Engines
V8-22​
15899A1​
15899T01​
5.7L & 525 SC
V8-22A​
814295A1​
15899T01​
5.7L Engines
V8-24S​
821125A1​
821125T01​
502 Mag, 8.2L, 600SC & 800SC
V8 20R​
817509T​
817509T​
817509A10​
 
you didn't provide your engine details (serial number) so cant say for sure....most 5.7l engines will be happy with the V8-24 TB-IV modules.

the 4.3 should have had the v6 module on it...
 
makomark said:
you didn't provide your engine details (serial number) so cant say for sure....most 5.7l engines will be happy with the V8-24 TB-IV modules.

the 4.3 should have had the v6 module on it...
Click to expand...
sorry about that I cant seem to find the serial number on it. If I remember correctly mine is V8-24S
 
the timing curve in the 24S is more conservative than that in the 24 module... the 22 module peaks about half way between the 24 and 24S modules but has a couple degrees less advance.
 
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