Will have one available soon. Cutting up a 87 Ts6m for parts. Check General Chat Section for pics. Thanks, Kevin My rudder port from the Ts6m (1987) has 2 - 340815 National seals under the snap ring and a #216 o-ring at the bottom. Seals are 1.494 bore size, 1.505 seal o.d., .25 thickness. O-ring is 1.375(1&3/8) o.d., 1.125(1&1/8) I.d., .135(1/8) cross section(thickness). Hope this helps as these seals are commonly available.