Another Speedometer Question

I have an 87 SN and this weekend I did the speedometer glass cover. They look great, post pictures later. Now, I cleaned the pitot and blew air from the front to the back. To test I tried to blow them with the mouth and nothing seem to move. I started blowing compress air slowly and it was until I give it a full blow that the move but only to 25mph. I took the boat to the lake and I confirmed that they are not working. Any ideas or help? Sounds like I may have to replace them. If I open the can they be fixed?

Thanks

Anthony,
Do the compressed air test again but directly to the gauge. Slowly bring up the PSI just like you did and listen for air leaking - you shouldn't have air leaking internally in the spedo. This will tell you if it is a gauge issue or if the pitot tube/dampener is leaking or blocked.

Anthony,
I see you did find Tellarico'd post on his speedo restoration. We'll see if he comes back with the name of who did them. There are a couple other threads on firms that rebuilt them as well.

The internal leaks are silver soldered. If you don't want to try it yourself, I would remove the internals and take it it a jeweler. It may cost a couple bucks but they are one of the trades that are very good at silver soldering.

I finally answered the other post.www.classicboatworks.com can fix your speedo. One of mine would fill up with water which I think indicates that the diaphram was broken.