Right Airguide Speedo not working

[matthew@98]

Group,

I am having problems getting my right speedo to work on my 98 Sport Nautiqute. I have the boat taken apart as I am writing this and am at a loss on what
to do next. I have the Airguide speedo out of the boat and it appears to work...I can blow about 10mph with my mouth ....and with an air compressor...being very careful not to blow the diaphram. I have the black tube off the speedo obviously and off the pilot tube on the stern. When I blow compressed air into the line, my son cannot feel any air coming from the other end...I have done this both ways (from dash to stern and stern to dash).
I think the tube is plugged....but I read there may be a gateway box behind the gas tank? Any tips on where I go from here? I have the back seats out
and can see the tanks but dont know where the gateway box is or even if there is one? Also....I have traced the black tube all the way from the dash to where it disappears behind the gas tank....all looks normal to me. Any help on what to do next while I have the boat apart would be greatly appreciated.

Thanks

[matthew@98]

Group,

I am having problems getting my right speedo to work on my 98 Sport Nautiqute. I have the boat taken apart as I am writing this and am at a loss on what
to do next. I have the Airguide speedo out of the boat and it appears to work...I can blow about 10mph with my mouth ....and with an air compressor...being very careful not to blow the diaphram. I have the black tube off the speedo obviously and off the pilot tube on the stern. When I blow compressed air into the line, my son cannot feel any air coming from the other end...I have done this both ways (from dash to stern and stern to dash).
I think the tube is plugged....but I read there may be a gateway box behind the gas tank? Any tips on where I go from here? I have the back seats out
and can see the tanks but dont know where the gateway box is or even if there is one? Also....I have traced the black tube all the way from the dash to where it disappears behind the gas tank....all looks normal to me. Any help on what to do next while I have the boat apart would be greatly appreciated.

Thanks

Fixed! After taking apart almost the entire boat interior trying to trace every inch of the tube from the pickup to the speedo, I found the problem. There is a long cylinder (maybe 1 inch in diameter by 12 inches long) that is attached to the inside stern wall inside the rear storage locker. In order to access it, you need to disasseble some of the interior inside the storage locker. Once you do, you will see it b/c you can see the tube as it goes thru the stern to the pickup tubes. There are two ends of this tube (a top and bottem end)....it is mounted vertically. The bottom end goes thru the stern out to the pickup tube and the top end travels out of the storage locker and makes its way back to the speedo. The top tube was disconnected on mine....I just reconnected it and whalla....speedo fixed....