Help removing plenum cover

TopshotTolbert · June 4, 2017

I apparently need to remove my top intake plenum cover to get to my IAC to replace it. Unless there is a much easier way of replacing it beside that. I can't find a schematic or manual on how to replace the upper plenum or atleast remove it. I took the six top bolts out but it seems to not want to be removed. Any help would be appreciated. Serial #0W395045 Black Scorpion engine

Edited June 4, 2017 by TopshotTolbert
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volzalum · June 5, 2017

The plenum cover does not have to be removed to replace the IAC

TopshotTolbert · June 5, 2017

I did have to remove it to replace the IAC. It is directly under the plenum on the port side of it. Took me a little bit but got it removed and a new intake gasket coming with the new IAC.

lakeguy936 · June 7, 2017

Two nuts under plenum on the stern end...

TopshotTolbert · June 10, 2017

On 6/7/2017 at 0:07 PM, lakeguy936 said:

Two nuts under plenum on the stern end...

I found them that night and replaced the IAC valve and installed a new intake gasket. Took it out Thursday night after work and it ran like brand new. The old IAC was completely clogged and filthy. Glad I replaced them. Boat ran like a dream

haumai · October 25, 2019

HI, new here.. I need to replace the thermostat on a 2005 Avy.. seems like the thermo housing is under the plenum.. but I cannot get it off! I saw the 2 nuts in the stern under the plenum, took those off but it still solidly stuck.. any advise? also what is IAC that you replaced.

Thanks