SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: NORDIC454 on May 04, 2009, 07:50:14 PM
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i just got a new Mr. gasket scoop with the butterflies that open with the throttle. how do i connect it to the carb?
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There shoulda been an adapter, or 2 for dual carbs, (Look like an air cleaner base), two long straps with 4 holes each and 8 wingnuts with it. If not, look up the Scoop at Summit, they have the adapter kits in stock last I checked. (Was gonna adapt mine to single carb, but put the tunnel on instead.)
Ray
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Kind of "tricky" to get the link "synched" to the front carb you'll have to experiment. the good news is the Scoop butterfly opening is not neccesarily relivant to the actual throttle opening , Call if you need help Tom
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I think he may be talking about the linkage for the flutterbys. Look at "project Mooo", shows the linkage on Rays boat. Anybody else gotta pic of this?
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I'll go take some more detailed pics of it in a minute, but yeah, that's pretty much it. Tom's right, the butterfly's really have nothing to do with air flow except at WOT. When I cruise around at say 2500-300 rpm, they're barely open, but open fully at WOT. Took a bit of time to get it, but after I figure out I needed to get the carbs idle screws dialed in before I even messed with that, was a snap. Just set it with a tiny bit of slack with the throttle closed (Normal position).
Ray
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Here's the installed scoop. You can see the wingnuts and carb base adapters. Hopefully you have those. The bases are also slotted, so the scoop needs to be fully tightened into place where you want it before you start installing/adjusting the linkage. But assembly is pretty easy. put on the bases, air cleaners or flame arrestors, tighten down making sure the bases remain straight, then drop the scoop on and attach it with the stell straps and wingnuts. Then install and adjust the linkage. The lever for the butterfly's is a splined shaft and the linkage is adjustable, so infininate possiblities exist with it. I like mine, although the butterflies and linkage arm are in for a titty pink anodizing, lol.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi673.photobucket.com%2Falbums%2Fvv95%2FIrrebel%2FMoo%2520build%2FP5040188.jpg&hash=41a11cdb43350b3a67cbc73b5efb8cbd39ae97ae)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi673.photobucket.com%2Falbums%2Fvv95%2FIrrebel%2FMoo%2520build%2FP5040189.jpg&hash=4e2e1c4c7ac9709d79704917c7bf2e9b4b487676)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi673.photobucket.com%2Falbums%2Fvv95%2FIrrebel%2FMoo%2520build%2FP5040190.jpg&hash=4b30b201908a63e04b9b6fe2ecb54a388d40ed95)
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi673.photobucket.com%2Falbums%2Fvv95%2FIrrebel%2FMoo%2520build%2FP5040191.jpg&hash=fe4247418cddd022962a67533807034d015e0638)
Ray
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thanks guys, i guess i should have given a little more info. i was looking to find out about the linkage, because i have to fab it up from nothing. i already have it mounted to the carb via my air cleaner.
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does any one in Vegas happen to have on of these laying around by chance? save me some time building one
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I'd run it without the butterflys for now, and order the linkage kit from Prestolite. Not listed online, but the Prestolite website shows parts list.
http://www.mr-gasket.com/pdf/6650.pdf (http://www.mr-gasket.com/pdf/6650.pdf)
Ray