ragedracer1977 Posted October 17, 2019 Report Share Posted October 17, 2019 I was doing some research on getting my air box rebuilt (carb heat linkages are beyond sloppy) and I came across this photo from @Sabremech The scat tube on mine is connected to a small screened hole on the front of the cowl. Is mine wrong? 1 Quote Link to comment Share on other sites More sharing options...
MIm20c Posted October 17, 2019 Report Share Posted October 17, 2019 (edited) Do you have any pictures? Almost sounds like the carb heat vent line (vents heated air to atmosphere when carb heat is closed/off) is bing routed back to a ram air port in the front? Which might be how it’s set up from the factory, my unit is set up differently with the TN and I don’t have a functional ram air. Edited October 17, 2019 by MIm20c Quote Link to comment Share on other sites More sharing options...
ragedracer1977 Posted October 17, 2019 Author Report Share Posted October 17, 2019 Just now, MIm20c said: Do you have any pictures? Almost sounds like the carb heat vent line (vents heated air to atmosphere when carb heat is closed/off) is bing routed back to a ram air port in the front? I didn't take one because I didn't realize it was different. The scat tube is routed to the screened hole in front of the cowl. So, yeah, I guess it's "ramming" unfiltered air into the bypass valve. 1 Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 17, 2019 Report Share Posted October 17, 2019 Brice you are showing the tail end where excess warm air gets exhausted when it isn’t being used by the carb... The screened air supply at the front of the cowl about an inch in diameter... is a cooling line for the generator... Carb heat is also the de facto alternate air supply and needs to supply as much unfiltered air as possible... So... find the air duct that goes to the heat muff... follow the exit of the heat muff... that is the warm air that goes to the carb heat inlet... the carb heat inlet is right next to the tail duct discussed above... Many early Mooneys didn’t get the tail duct... even though the hardware has a barb/bump to help hold the hose in place... OHing the airbox is highly recommended... they suffer from a lot of wear... PP thoughts only, not a mechanic... Ask JIM his thoughts on OHing his carb heat system... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
ragedracer1977 Posted October 17, 2019 Author Report Share Posted October 17, 2019 Just now, carusoam said: Brice you are showing the tail end where excess warm air gets exhausted when it isn’t being used by the carb... The screened air supply at the front of the cowl about an inch in diameter... is a cooling line for the generator... Carb heat is also the de facto alternate air supply and needs to supply as much unfiltered air as possible... So... find the air duct that goes to the heat muff... follow the exit of the heat muff... that is the warm air that goes to the carb heat inlet... So some jackwagon hooked the bypass valve to the generator cooling duct. Nice Quote Link to comment Share on other sites More sharing options...
MIm20c Posted October 17, 2019 Report Share Posted October 17, 2019 Just now, carusoam said: The screened air supply at the front of the cowl about an inch in diameter... is a cooling line for the generator... Interesting, I thought that was the ram air inlet since mine was capped off. Good to know. Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 17, 2019 Report Share Posted October 17, 2019 Brice, I updated my post... See JIM.... I think you may have shared the same mechanic... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 17, 2019 Report Share Posted October 17, 2019 MI, Our C guys didn’t get the Ram air option... Alt air yes, but it is heated air when used... Fewer mechanics are being trained in the arts and sciences of carburetors and their support systems... Surprise! Best regards, -a- Quote Link to comment Share on other sites More sharing options...
ragedracer1977 Posted October 17, 2019 Author Report Share Posted October 17, 2019 1 minute ago, carusoam said: MI, Our C guys didn’t get the Ram air option... Alt air yes, but it is heated air when used... Fewer mechanics are being trained in the arts and sciences of carburetors and their support systems... Surprise! Best regards, -a- Well, apparently some of us got a ram air option hahaha. it looks like mine is all wrong. The linkages are shot, hose goes to the wrong place, the push/pull cable is mounted to clamp on the air box. I’ve got a bunch of crappy wires connecting the whole thing. ill have to ask @Jim Peace who not to use lol 1 Quote Link to comment Share on other sites More sharing options...
carusoam Posted October 17, 2019 Report Share Posted October 17, 2019 Finally, Jim’s good deed and tough learned lesson has become fruitful for helping somebody else. -a- Quote Link to comment Share on other sites More sharing options...
Skates97 Posted October 17, 2019 Report Share Posted October 17, 2019 55 minutes ago, ragedracer1977 said: So some jackwagon hooked the bypass valve to the generator cooling duct. Nice Mine was exactly as you are describing when I bought it. It also had the butterfly hooked up wrong so that it was closed when carb heat was off and open when carb heat was on.... 1 Quote Link to comment Share on other sites More sharing options...
DXB Posted October 17, 2019 Report Share Posted October 17, 2019 2 hours ago, ragedracer1977 said: 2 hours ago, ragedracer1977 said: I didn't take one because I didn't realize it was different. The scat tube is routed to the screened hole in front of the cowl. So, yeah, I guess it's "ramming" unfiltered air into the bypass valve. I was doing some research on getting my air box rebuilt (carb heat linkages are beyond sloppy) and I came across this photo from @Sabremech The scat tube on mine is connected to a small screened hole on the front of the cowl. Is mine wrong? Very odd setup. I think that intake on the front of the cowl was originally meant to blow air on the generator? The duct from mine has long been removed, and I have sealed the hole in the cowl. Is your carb heat box actually connected to the muffler shrowd or just that little hole in the front cowl? Quote Link to comment Share on other sites More sharing options...
ragedracer1977 Posted October 17, 2019 Author Report Share Posted October 17, 2019 5 hours ago, DXB said: Very odd setup. I think that intake on the front of the cowl was originally meant to blow air on the generator? The duct from mine has long been removed, and I have sealed the hole in the cowl. Is your carb heat box actually connected to the muffler shrowd or just that little hole in the front cowl? The large tube is connected to the muffler shroud. Quote Link to comment Share on other sites More sharing options...
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