Yamaha speedomoter problem

[slotfish]

I recently purchased a 2001 Crestliner with a 90 horse Yamaha. After about 2 times on the water, the speedomoter quit working. The wiring looks good and all, but I'm wondering if something could be clogged or gunked-up where it takes the reding by the motor. Where is this and has anyone ever had a similar problem that they have fixed.
Any help will be greatly apreciated.
Thanks

[wastewaterguru]

See my comment under the open water main forum.

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John K., a.k.a. wastewaterguru
Prior Lake, Minnesota