T30 prop shaft
When I hauled out Immrama (1973 T30) in March to paint
the bottom and replace the cutlass bearing, the mechanic
at the yard found wear and scoring on the original bronze propellar shaft. This happened at the intermediate bearing located under the raised portion of the cabin sole
between the engine and the point where the shaft exits to the water
. This bearing is not so much a bearing, it has no roller or ball bearings or anthing and relied on lubrication alone. When we removed the shaft it also showed signs of pinking, as a result of a galvanic reaction. We ended up replacing shaft (with stainless steel
, bronze was not to be found), the intermdiate bearing, and the cutlass bearing. Lining up the shaft properly, especially with the intermediate bearing, was critical and required some fabrication for the intermediate. Since then, the propulsion
system has worked great except for a harmonic squeal at 1000 RPM
, a very useful speed on my boat, that seems to be decreasing as it breaks in. I also have a small grease gun and lubricate that bearing religiously, although it probably took 30 years for the first one to fail.
That said, the T30 is a great sailing boat. I have the original Atomic four engine and a three bladed prop so it also motors well, at least in forward. Throw it into reverse, and you probably have time to go below and get a cold drink while the boat thinks about moving backwards. If you get to the point in looking at a T30 that you have it hauled out, be sure the lift
operator knows the location of the prop. Usually they try to snug the aft strap up to the keel which is right where the prop is located. WOrth marking lift
points on the hull
The only weakness I personally have encountered is the effort involved in the shift linkage because of the distance involved. I found myself coming into my slip not only unable to sift into reverse, but unable to get out of forward. Luckily, my engine starts easily and I was able kill and restart, then kill and drift. The repair was simple requiring a large screwdriver, a flexible rubber sink stopper, and a few four letter words.
The Tartan is a great boat, happy in 30+ knot
winds (reefed properly) or in 10 knots. I regularly single
hand mine or comfortably have 3 friends aboard for long weekends. Let me know what you find.