Replacing sheaves in blocks

Here in Tennessee we've had the coolest, rainiest, and windiest July in memory. This has spurred me to finish my "restoration" of my '81 H16. This included filling and fairing 3 areas on the bottom of the hulls, painting almost everything, and new running and standing rigging. Now I need to replace the sheaves in the blocks on the bridle, and the sheave on the mast for the jib halyard. I thought I would just drill out the bridle sheaves and replace the rivets with small stainless nuts and bolts, but what about the one on the mast? Do I need to remove the entire fitting to drill out the sheave? Or should I replace all the blocks with new, and are these available from Hobie?
And finally, any other Hobie sailors in the Nashville, TN area?
Thanks in advance!
David

Bridle blocks?? If you are referring to the sheaves on the jib cars...yes you can replace them by drilling out the old ones and replacing the rivets with clevis pins and split rings. Harken sells a bearing sheave for ten bucks or so. You can search this forum to find the part numbers as this has been discussed several times.

Yes, on the bridle at the middle shackle are 2 small light blocks. I've seen them on the Hobie 16 parts page, and honestly didn't know what they were for, but thought I'd figure it out once I actually reached a point of standing the mast and rigging the boat ( in the driveway!).
Thanks for the jib block sheave lead.
David

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David

I think he's referring to the stock jib sheet blocks that often end up on the forestay adjuster chainplate in storage.

You can't replace those sheaves. You need to replace the entire block.

Harken 224 Micro Block is what comes with new boats:


$10 from http://www.harken.com or available at your local dealer.

DUH! I get it. The small blocks are moved to the jib clew when rigging the boat, but are kept on the bridle for storage!! Thanks for giving me a clue! I should be ready to set the rig up at the end of this week. Hope to be sailing within the next 2 weeks, thanks to the info and help from here.
David

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David