I recently noticed a newer C310 (about a March 2001 vintage) that had the engine exhaust thru hull located in the boot stripe. The one on my hull boat, hull #40 is about 6 or 8 inches under that, and exiting almost vertically. I became curious as to when the change was made, and if it was done to try and reduce the exhaust soot accumulation on the transom, or for some other reason. Do any of the other C310 owners care to share their thoughts, exhaust location and hull number, or date of manufacture?
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John J
310 exhaust
Jon, I am glad to see Catalina has been listening to the owners. The origonal design was bad from the get go. Is the new exhaust up and over enough to get rid of the soot? Like you I am interested to hear. I have added 2.5 gal. of Soy Gold to my tank and it has helped reduce the soot quite a bit. The soot that remains washes off easily with just a sponge and lake water. I would think If you were ambitious enough you could re-rout the exhaust to a higher point. Hull #23 Mfg, late 99
Jon, I am glad to see Catalina has been listening to the owners. The origonal design was bad from the get go. Is the new exhaust up and over enough to get rid of the soot? Like you I am interested to hear. I have added 2.5 gal. of Soy Gold to my tank and it has helped reduce the soot quite a bit. The soot that remains washes off easily with just a sponge and lake water. I would think If you were ambitious enough you could re-rout the exhaust to a higher point. Hull #23 Mfg, late 99
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Bob Braddy
Exhaust port
Yes, there is a good deal of soot from the "Underwater" exhaust, but I agree, it is easy to clean. I have one of the earliest 310s made, Hull #6, and so can speak with some authority on matters of the early boats. By the way, I sail out of San Pedro, CA and really like the boat. Best sailing, Bob
Yes, there is a good deal of soot from the "Underwater" exhaust, but I agree, it is easy to clean. I have one of the earliest 310s made, Hull #6, and so can speak with some authority on matters of the early boats. By the way, I sail out of San Pedro, CA and really like the boat. Best sailing, Bob
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Jon W.
RE; to John and Bob
I'm only speculating that the relocation of the exhaust may be related to soot. I hope it wasn't for some other, more serious reason. I don’t know, but it looked like it may be somewhat effective in reducing black deposits since the exhaust water was squirting off to the side where it might be left behind and not dragged up to the boat in the backwash. On the other hand, it may tend to leave a black streak on the boot stripe, although I didn't see one on this particular boat. I've also noticed with my boat that there is a definite rpm/speed that determines whether I get soot or not. Below about 6.1 knots, very little or no soot. Above that speed means I wipe the transom when I arrive at my destination. I guess this tells me how hard the engine is working. As far as relocating the exhaust, the thought did occur to me (for just a moment), but I would need to know how effective the change would be before I really even considered it. That’s sort of why I posted on this subject. BTW, isn’t cleaning our boats one of the joy’s of ownership??? And Bob, you really did get an early boat. Where can you sail near Ft Collins, or can you?
I'm only speculating that the relocation of the exhaust may be related to soot. I hope it wasn't for some other, more serious reason. I don’t know, but it looked like it may be somewhat effective in reducing black deposits since the exhaust water was squirting off to the side where it might be left behind and not dragged up to the boat in the backwash. On the other hand, it may tend to leave a black streak on the boot stripe, although I didn't see one on this particular boat. I've also noticed with my boat that there is a definite rpm/speed that determines whether I get soot or not. Below about 6.1 knots, very little or no soot. Above that speed means I wipe the transom when I arrive at my destination. I guess this tells me how hard the engine is working. As far as relocating the exhaust, the thought did occur to me (for just a moment), but I would need to know how effective the change would be before I really even considered it. That’s sort of why I posted on this subject. BTW, isn’t cleaning our boats one of the joy’s of ownership??? And Bob, you really did get an early boat. Where can you sail near Ft Collins, or can you?
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Joh n J.
310 Exhaust
Attached is the reply from Catalina with regard to the exhaust change. John, it was for ease of installation plus it also gave a little fairer run for the hose at the same time. This would not be an aftermarket change that you or any 310 owner would want or need to consider if anyone was thinking along that line. smooth sailing, warren p
Attached is the reply from Catalina with regard to the exhaust change. John, it was for ease of installation plus it also gave a little fairer run for the hose at the same time. This would not be an aftermarket change that you or any 310 owner would want or need to consider if anyone was thinking along that line. smooth sailing, warren p
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Bob Braddy
Sailing Location and Mast Tuning
Jon, As I indicated, I sail out of San Pedro, California. We get all sorts of winds in the area, from 5-10 kts up. Our marina is at the west end of LA Harbor at the top of what is called Huricane Gulch for the terrific winds that come up every afternoon (typically around 20 kts bouncing up to 25 +. It gives an exciting finish to a sail. Here's a question for you and anyone else who's listening. Have you had any difficulty tuning your mast, i.e., getting it in column, straight, and with the shrouds holding equal tension (as the manual recommends). I've done it, but not with equal tension on the forward and after lowers. With equal tension, the top of the mast above the upper spreader, hooks forward. Later, Bob
Jon, As I indicated, I sail out of San Pedro, California. We get all sorts of winds in the area, from 5-10 kts up. Our marina is at the west end of LA Harbor at the top of what is called Huricane Gulch for the terrific winds that come up every afternoon (typically around 20 kts bouncing up to 25 +. It gives an exciting finish to a sail. Here's a question for you and anyone else who's listening. Have you had any difficulty tuning your mast, i.e., getting it in column, straight, and with the shrouds holding equal tension (as the manual recommends). I've done it, but not with equal tension on the forward and after lowers. With equal tension, the top of the mast above the upper spreader, hooks forward. Later, Bob
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Jon W.
RE: Mast Tuning
Wow, and I thought it was just me! My C310's mast sounds like it's doing the same thing as yours. It had that slight forward bend above the upper spreader as tuned by the dealer. I've re-tuned several times with no real change. 1. I bought the video "Tuning Your Rig" by Brian Toss from him at the last Seattle boat show. No magic answer there. 2. I've tightened the forward lowers as much as I dare (since they're only anchored to the deck), but that doesn't seem to have much effect on the upper portion of the mast. 3. I installed a pretty powerful backstay adjuster which seems to reduce the forward "hook" somewhat when tightened, but I'm not sure it eliminates it. I was actually hoping for a little aft bend. Plus I really don't like using all that mast compression. I have started to think that the mast just has a slight bend in it (maybe from shipping) that causes it to bend in that direction when the rigging is tensioned. I really can't think of a way to influence the fore and aft bend in the upper part of the mast. I wonder if any of the other C310's owners have seen this, now that we know there are at least two. I think I'll post this question on Brian Toss's forum, Spartalk.
Wow, and I thought it was just me! My C310's mast sounds like it's doing the same thing as yours. It had that slight forward bend above the upper spreader as tuned by the dealer. I've re-tuned several times with no real change. 1. I bought the video "Tuning Your Rig" by Brian Toss from him at the last Seattle boat show. No magic answer there. 2. I've tightened the forward lowers as much as I dare (since they're only anchored to the deck), but that doesn't seem to have much effect on the upper portion of the mast. 3. I installed a pretty powerful backstay adjuster which seems to reduce the forward "hook" somewhat when tightened, but I'm not sure it eliminates it. I was actually hoping for a little aft bend. Plus I really don't like using all that mast compression. I have started to think that the mast just has a slight bend in it (maybe from shipping) that causes it to bend in that direction when the rigging is tensioned. I really can't think of a way to influence the fore and aft bend in the upper part of the mast. I wonder if any of the other C310's owners have seen this, now that we know there are at least two. I think I'll post this question on Brian Toss's forum, Spartalk.
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Bob Braddy
310 Mast Tuning
Jon, Thanks for your response and for your message to Brion. They are both to the point and describe the problem well. I have tried everything except playing with the backstay. I have resisted that because I really don't believe that has anything to do with it on a masthead, double spreader rig. If the bend were seen through the whole mast, then I think I would look to the backstay, but it's not. Fiddling with the forward and after lowers does affect the bend, and that is the only thing I have found that does. At the moment, my forward lowers are tighter than the after ones and the mast is straight. I am gradually trying to bring the two shrouds into balance, a turn or so at a time. So far, the hook has not returned, but the shrouds are not balanced either. Hard on the wind in a blow, there is considerable slack in the leeward shrouds, more than I like at any rate. So the problem continues. By the way, I was brought up in Seattle and am wondering where you sail from. A 310 would be an ideal boat for your area. Later, Bob
Jon, Thanks for your response and for your message to Brion. They are both to the point and describe the problem well. I have tried everything except playing with the backstay. I have resisted that because I really don't believe that has anything to do with it on a masthead, double spreader rig. If the bend were seen through the whole mast, then I think I would look to the backstay, but it's not. Fiddling with the forward and after lowers does affect the bend, and that is the only thing I have found that does. At the moment, my forward lowers are tighter than the after ones and the mast is straight. I am gradually trying to bring the two shrouds into balance, a turn or so at a time. So far, the hook has not returned, but the shrouds are not balanced either. Hard on the wind in a blow, there is considerable slack in the leeward shrouds, more than I like at any rate. So the problem continues. By the way, I was brought up in Seattle and am wondering where you sail from. A 310 would be an ideal boat for your area. Later, Bob
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Michael McCann
Rig Tuning
John, and Bob; I have never seen any documentation that says the forward, and aft lower shrouds have to have the same tension. I currently sail a C36, and my previous boat was a C25 T. I adjust my 36 the same as I did the C25. The difference being there is no adjustable backstay on the 36. I like to have a little bend aft in the mast, and since I don't have an adjustable backstay I tension for upwind sailing. The 310 probably has double spreaders, so I will not be much help, as I have no experience with DS rigs. I have always tensioned the forwards tighter than the afts. Michael
John, and Bob; I have never seen any documentation that says the forward, and aft lower shrouds have to have the same tension. I currently sail a C36, and my previous boat was a C25 T. I adjust my 36 the same as I did the C25. The difference being there is no adjustable backstay on the 36. I like to have a little bend aft in the mast, and since I don't have an adjustable backstay I tension for upwind sailing. The 310 probably has double spreaders, so I will not be much help, as I have no experience with DS rigs. I have always tensioned the forwards tighter than the afts. Michael
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