I have a CD prop on my Hunter 33 and cannot read a prop size. Does anyone know the prop size for this boat with a Yanmar 2GM engine?
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prop size?
As no one is answering this, I will tell you what was used with my 2QM15 engine on a 33'. The boat which was stock had a square shaped two blade 14X12 prop. I changed it to a three blade 13X11 and picked up 500 RPM and about 1.5 knots of speed and much more power for the rough times. What ever you do, do not over prop the engine. Here is a good link on why three blades are much better than two and a good prop shop to call if you like. http://westbynorth.com/Choosing.aspx
As no one is answering this, I will tell you what was used with my 2QM15 engine on a 33'. The boat which was stock had a square shaped two blade 14X12 prop. I changed it to a three blade 13X11 and picked up 500 RPM and about 1.5 knots of speed and much more power for the rough times. What ever you do, do not over prop the engine. Here is a good link on why three blades are much better than two and a good prop shop to call if you like. http://westbynorth.com/Choosing.aspx
Same here on prop type
My boat also came with a two-blade sailing prop, and it was useless. Not only didn't if offer much of any propulsion in the slightest of rough weather, but at low speeds it took way too long to offer any steerage for the boat. Powering-up in reverse to slow when entering the slip was just horrible. I went to a propeller shop in Sarasota Florida, explained the problem, and they spec'd me out a new three-blade propeller which has made a marked difference. It probably does cost me the better part of one knot when sailing, but to me it's worth that price. There's been a long debate in Hunter circles as to whether it's best to lock the prop while sailing or let it spin freely; which is of greater concern with the 3-blade prop than it would be with the 2-blade version. One argument against letting it spin is that it heats up the transmission, which I've noticed it does. However, I've found the drag to be two to three times greater when the prop is locked than when it's allowed to spin. Seven years now and I haven't had any transmission problems. I'd recommend you contact a shop that does nothing but propellers and have them spec one for your boat. There's a picture of my prop viewable via the link attached to this message. Scott s/v Rubicon Key West
My boat also came with a two-blade sailing prop, and it was useless. Not only didn't if offer much of any propulsion in the slightest of rough weather, but at low speeds it took way too long to offer any steerage for the boat. Powering-up in reverse to slow when entering the slip was just horrible. I went to a propeller shop in Sarasota Florida, explained the problem, and they spec'd me out a new three-blade propeller which has made a marked difference. It probably does cost me the better part of one knot when sailing, but to me it's worth that price. There's been a long debate in Hunter circles as to whether it's best to lock the prop while sailing or let it spin freely; which is of greater concern with the 3-blade prop than it would be with the 2-blade version. One argument against letting it spin is that it heats up the transmission, which I've noticed it does. However, I've found the drag to be two to three times greater when the prop is locked than when it's allowed to spin. Seven years now and I haven't had any transmission problems. I'd recommend you contact a shop that does nothing but propellers and have them spec one for your boat. There's a picture of my prop viewable via the link attached to this message. Scott s/v Rubicon Key West
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