Merc Scorpion 330 - Bolts on Engine Cover

(jthst) · (jthst) **Join Date: Dec 2008** 06-14-2009, 8:19 AM

I'm guessing the plate on top of the engine is primarily a cover. Is this correct? Does anyone know the size and type of bolts that attach it? They seem to be some sort of modified allan nut.

(chpthril) · (chpthril) **Join Date: Oct 2007** 06-14-2009, 9:00 AM

Sounds like a Torx head.

(jthst) · (jthst) **Join Date: Dec 2008** 06-14-2009, 12:17 PM

It looks a bit like a torx head but a fairly large size (ie. way bigger than the screwdriver torx heads I'm used to seeing). Anybody know the size? Thanks

(chpthril) · (chpthril) **Join Date: Oct 2007** 06-14-2009, 12:46 PM

Yep, they range from a T8 up to a T60. Go buy a cheap set from Walmart, should have most of the common sizes.

(wakebrdjay) · (wakebrdjay) **Join Date: Apr 2008** 06-14-2009, 4:52 PM

I don't think it's just a cover,I think it's part of the intake.

(yubasanger) · (yubasanger) **Join Date: Jul 2007** 06-14-2009, 7:51 PM

That is the upper half of the intake plenum. If you look close the throttle body is attach to the top half of the plenum. Don’t take off unless you have to will be a gasket in there.

(jthst) · (jthst) **Join Date: Dec 2008** 06-14-2009, 9:04 PM

Thanks, I guess I'll leave it for now. I wanted to take it off to get access to a couple of hoses on the front for the heater but I was able to just barely reach them with it on.

(antoddio) · (antoddio) **Join Date: Dec 2006** 06-15-2009, 6:01 AM

If you have a pic how you hooked up the heater to the engine I'll be your best friend forever. Haha. Seriously though, I have the same engine and almost the same boat and will be hooking up the heater next week.

(yubasanger) · (yubasanger) **Join Date: Jul 2007** 06-15-2009, 12:10 PM

Todd,
Here are the Heater install pages from the Mercury manual. Hope this helps.
Upload

(antoddio) · (antoddio) **Join Date: Dec 2006** 06-15-2009, 12:38 PM

Sweet, that helps a lot Brandon. Where did you get that manual from? My merc manual doesn't have that sort of info.

(yubasanger) · (yubasanger) **Join Date: Jul 2007** 06-15-2009, 1:12 PM

I have the Mercury MerCruiser install manual cd-rom.

(jthst) · (jthst) **Join Date: Dec 2008** 06-15-2009, 6:32 PM

Todd:

I have my boat at the storage yard so no pictures. I think what the dealer did was install a new housing over the thermastat that had an inlet and outlet fitting. The hoses were run up the port side of the boat to the heater core in the front storage compartment. If this thread continues for a few more days and I have a chance to get out to the boat I will take some pictures.

(antoddio) · (antoddio) **Join Date: Dec 2006** 06-15-2009, 7:30 PM

JT, the diagram from Brandon helps a lot, but a picture is worth many diagrams, so if you get one that'd be awesome.