I have a 1985 Mercury xsr2 Black Max 150 and the shop said that the Advance module is bad and they do not make the part any more the part# is 93772A1, Does any one know that i can get. thank you
Last edited by JB : February 27th, 2009 at 06:25 PM.
Reason: solicitation deleted.
on that engine we normally eliminated the advance module anyway.
with some of the fuel grades we get and the lack of a knock detect sensor on the 150 it sometimes gave piston issues above 5000 RPM.
there is a bulliten on it someplace.
Those modules were responsible for many an engine failure. They would advance the timing and not retard it again and the pistons would get all hot and bothered. Remove it, bin it, go boating.....
Have fun,
Chris.......
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1972 Bertram 'Bahia Mar' 20
2006 Mercruiser 4.3MPI (OW617679) w/Alpha 1 Gen II (OW829301)
this stabilizer/advance module served 2 functions, one was to alter the switchbox bias to advance timing if the RPM fell below about 600 RPM to stabilize the idle speed, the other was above about 5000 RPM it would add about 6* more ign timing, by altering the switchbox bias again, if all engine functions were perfect and the hull propped correctly and the correct octane fuel was used it worked very well.
it did not like 6 month old fuel, did not like a weakening fuel pump, any fuel restrictions, any varnish buildup in the main jet circuits or about anything else.
had they used a knock detect circuit like the EFI 200 it may have worked better.
but try to look up the bullitens on the spark advance or idle stabilizer module.
I normally dont reccomend trying to re-engineer products.
but do discuss this with your repair facility and do try to find the tech bullitens concerning the module.
need a can not find part for a mercury 150
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