Our 1976 Hunter 30' has a pulley on the end of the boom inside the track, which is frozen, I have it free but its tight,and the edges worn. I think prior to the spring it should be replaced. Problem is (being a novice at this, A real real novice) I don't have a clue what it is called. The actual wheel on the pulley is less than an inch in diameter. It is connected to a piece of 1/8" or 3/16" wire, and somewhere inside the boom it is spliced to a rope, and it comes out the other end. Its is riveted/ screwed to the inside of the track (patchwork repair?). I dont believe it was original equipment, because the slat in the track that it sits in, looks like it was cut by hand and not machined. Anyone have any idea what it is called. and where to find a replacment. I don't want to take it out till I find a new one. The boom is in the cellar (along with the rest of the interior) at the moment.
- Status
Outhaul?
The "pulley" is a sheave, pronounced shiv. It is likely a Kenyon boom and you should be able to find pictures on the Rig-Rite site(Related Link). Here is another link. Scroll down to see a picture of part number K-11722: http://www.rigrite.com/Spars/Kenyon_Spars/2333-boom.html My H37C Kenyon boom has three sheaves on the aft end, two are for the reefing lines. The third and center one is for the outhaul. A piece of wire(cable) comes out of the boom(around that sheave) and up to a "car" on a track on top of the boom. The clew of the mainsail attaches to this car. A line comes out the forward end of the boom(again around a sheave) and back to a cleat on the bottom of the boom. This line attaches to a block or blocks inside the boom to provide some purchase. This is for adjusting the tension of the foot of the mainsail. This tension is very important in sail trim. You need to read up on that if it is new to you.
The "pulley" is a sheave, pronounced shiv. It is likely a Kenyon boom and you should be able to find pictures on the Rig-Rite site(Related Link). Here is another link. Scroll down to see a picture of part number K-11722: http://www.rigrite.com/Spars/Kenyon_Spars/2333-boom.html My H37C Kenyon boom has three sheaves on the aft end, two are for the reefing lines. The third and center one is for the outhaul. A piece of wire(cable) comes out of the boom(around that sheave) and up to a "car" on a track on top of the boom. The clew of the mainsail attaches to this car. A line comes out the forward end of the boom(again around a sheave) and back to a cleat on the bottom of the boom. This line attaches to a block or blocks inside the boom to provide some purchase. This is for adjusting the tension of the foot of the mainsail. This tension is very important in sail trim. You need to read up on that if it is new to you.
Outhaul
Ed, that is not the part, but i think your right in that it performs the same function. I thought it had something to do with the outhaul, but I'm just not sure. That link you send has the sheave in the cast end of the boom. This one is just forward of the aluminum casting (about 1/2" inches) and is cut into the inside of the track. The cut looks very crude, so I am sure it was not original equipment. The wire that is protruding has a second piece of wire attached with a halyard, which is only a foot long. The rope comes out on the opposite end on the bottom, rather that on the upper (track) side. Coincidently I just sent my main out to sailcare to be reconditioned, and he told me it is not standard (hunter) size, the foot is about 8" short, so that may explain the wire extension (to compensate for a short sail). He said the sail is fine, and in good shape, with few repairs needed. Any more suggestions, or ideas. I see on sheave that looks real close on page 1027 of the West Marine (2004) catalog. It is listed under "Sheave blocks & Lead Blocks", and in the picture it is the one in the middle, with the four screw holes. but I cant identify the part number from the picture. Once again and coincidentiley the wheel on my sheave is brass. Oneof the several listed in the West Catalog, says nickel plated brass
Ed, that is not the part, but i think your right in that it performs the same function. I thought it had something to do with the outhaul, but I'm just not sure. That link you send has the sheave in the cast end of the boom. This one is just forward of the aluminum casting (about 1/2" inches) and is cut into the inside of the track. The cut looks very crude, so I am sure it was not original equipment. The wire that is protruding has a second piece of wire attached with a halyard, which is only a foot long. The rope comes out on the opposite end on the bottom, rather that on the upper (track) side. Coincidently I just sent my main out to sailcare to be reconditioned, and he told me it is not standard (hunter) size, the foot is about 8" short, so that may explain the wire extension (to compensate for a short sail). He said the sail is fine, and in good shape, with few repairs needed. Any more suggestions, or ideas. I see on sheave that looks real close on page 1027 of the West Marine (2004) catalog. It is listed under "Sheave blocks & Lead Blocks", and in the picture it is the one in the middle, with the four screw holes. but I cant identify the part number from the picture. Once again and coincidentiley the wheel on my sheave is brass. Oneof the several listed in the West Catalog, says nickel plated brass
Cannot visualize.
I guess we need a picture. It seems to be part #RF917 on page 1027. And, having read both of your posts again, it is upside down in a slot near the aft end of the boom. And this slot was cut in the track(the one for the mainsail bolt rope)? If yes to that it would seem someone made an outhaul for a short-footed sail. But why would the original outhaul wire not reach 8 inches? I have never tried but I think my outhaul car would move forward at least a foot. I am thinking that maybe you should take the castings off both ends and pull the guts out of the boom. See if that doesn't help you make sense of it. Maybe the guy(I am sure it was a guy) screwed up the original outhaul and this was his fix.
I guess we need a picture. It seems to be part #RF917 on page 1027. And, having read both of your posts again, it is upside down in a slot near the aft end of the boom. And this slot was cut in the track(the one for the mainsail bolt rope)? If yes to that it would seem someone made an outhaul for a short-footed sail. But why would the original outhaul wire not reach 8 inches? I have never tried but I think my outhaul car would move forward at least a foot. I am thinking that maybe you should take the castings off both ends and pull the guts out of the boom. See if that doesn't help you make sense of it. Maybe the guy(I am sure it was a guy) screwed up the original outhaul and this was his fix.
Outhaul
I think your right, at least about the part of the guy screwing it up. I am going to take it apart and at least replace the pulley. I have a friend who knows a lot more about rigging than I do, and I will have him take a look at it. Thanks again for the help!
I think your right, at least about the part of the guy screwing it up. I am going to take it apart and at least replace the pulley. I have a friend who knows a lot more about rigging than I do, and I will have him take a look at it. Thanks again for the help!
- Status