I am in the process of replacing the outboard engine for my Hunter 25.5. I am wondering what the minimum HP I should use. The current engine is a 9.9 HP 2 stroke Johnson (20 years old and currently locked up). I was able to motor the Johnson to a hull speed of 6.1 Knots and was not able to keep up with a 22' Catalina with an 8HP. I realize that the hull speed plays a factor in the max speed but I would like to hear some opinions as to what HP engine you would recommend. Thanks for the support, Ryan
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Knots per hoursepower6.9
Catalina 22 with a 8hp 3-blade prop will do 6.7 knots. The Hull speed is 5.9 The Hunter 25.5 Has a hull speed of 6.3 knots. All engines listed with a 3 blade prop. 8hp =6 knots 9hp=6.2 knots 10hp=6.4 11hp=6.6 12hp=6.8(what you need to travel the same speed as the Cat 22) 13hp=6.9 knots 14hp=7knots 15hp=7.1 knots Good Luck.
Catalina 22 with a 8hp 3-blade prop will do 6.7 knots. The Hull speed is 5.9 The Hunter 25.5 Has a hull speed of 6.3 knots. All engines listed with a 3 blade prop. 8hp =6 knots 9hp=6.2 knots 10hp=6.4 11hp=6.6 12hp=6.8(what you need to travel the same speed as the Cat 22) 13hp=6.9 knots 14hp=7knots 15hp=7.1 knots Good Luck.
Horse power or no Horse power
I use a Mercury 9.9 HP 4 cycle outboard and I am satisfied with it on My 84 Hunter 25.5. I can make 6.0 Knots with about 75% of its full RPM. It uses 1/2 Gallon per hour. Why do you need to go any faster!
I use a Mercury 9.9 HP 4 cycle outboard and I am satisfied with it on My 84 Hunter 25.5. I can make 6.0 Knots with about 75% of its full RPM. It uses 1/2 Gallon per hour. Why do you need to go any faster!
Apples to Apples
It seems to me that if you want to compare your boat to another, compare it to a Catalina 25 or 27. A Catalina 22 is much lighter than the Hunter 25.5. I use a Yamaha 5hp on my Hunter 23 and it moves me along at about 5 knts at 1/2 throttle. Seems like a 9hp motor should move the 25.5 fine. Fair Winds.
It seems to me that if you want to compare your boat to another, compare it to a Catalina 25 or 27. A Catalina 22 is much lighter than the Hunter 25.5. I use a Yamaha 5hp on my Hunter 23 and it moves me along at about 5 knts at 1/2 throttle. Seems like a 9hp motor should move the 25.5 fine. Fair Winds.
Thanks for the advice
As a very novice sailor I like to get opinions from as many folks as possible. As always I appreciate the advice and have decided to go with a 9.8 HP 4 stroke Nissan with electric start only because it came with an alterator. I did find a web site with excellent deals on outboards. As long as you don't live in TN you get it with no sales tax which made the differance. Onlineoutboards.com Happy sailing, Ryan
As a very novice sailor I like to get opinions from as many folks as possible. As always I appreciate the advice and have decided to go with a 9.8 HP 4 stroke Nissan with electric start only because it came with an alterator. I did find a web site with excellent deals on outboards. As long as you don't live in TN you get it with no sales tax which made the differance. Onlineoutboards.com Happy sailing, Ryan
OnlineOutboards
A slip neighbor bought one from them a couple of years ago also for a 25.5 as a matter of fact. Two suggestions first look at the Tohatsu it is the same motor but will save you a few bucks and get the longest foot you can minimum 20" the 25" would be better. And a third he ended up putting a larger backing support inside the hull to support the heavier 4 stroke motor and especially with the 9.9 with all that extra torque.
A slip neighbor bought one from them a couple of years ago also for a 25.5 as a matter of fact. Two suggestions first look at the Tohatsu it is the same motor but will save you a few bucks and get the longest foot you can minimum 20" the 25" would be better. And a third he ended up putting a larger backing support inside the hull to support the heavier 4 stroke motor and especially with the 9.9 with all that extra torque.
Online Outboards
I did take a look at the Tohatsu; however I chose to pay the little extra money for the Nissan. My decision there was not based on the name brand but was based on my experience as a supplier (Quality Manager) to the manufacturing plant that produces both engines. While the Tohatsu is produced in the same plant with virtually the same parts, the quality standards of the Tohatsu parts is not as stringent as the Nissan. While they both have three year warrantees I wanted to make sure the motor lasted 3 years and 2 days v/s 3 years and 1 day. Ryan
I did take a look at the Tohatsu; however I chose to pay the little extra money for the Nissan. My decision there was not based on the name brand but was based on my experience as a supplier (Quality Manager) to the manufacturing plant that produces both engines. While the Tohatsu is produced in the same plant with virtually the same parts, the quality standards of the Tohatsu parts is not as stringent as the Nissan. While they both have three year warrantees I wanted to make sure the motor lasted 3 years and 2 days v/s 3 years and 1 day. Ryan
outboards
Buy what you like . I had a tohatsu on our h23 for at least 10 years before thieves stole it > I now have a nissan and other than the paint I cant tell much difference . In fact I have had a couple of issues with the nissan which is much newer than I ever did with the tohatsu > Both seem to be very dependable motors to me , Mike
Buy what you like . I had a tohatsu on our h23 for at least 10 years before thieves stole it > I now have a nissan and other than the paint I cant tell much difference . In fact I have had a couple of issues with the nissan which is much newer than I ever did with the tohatsu > Both seem to be very dependable motors to me , Mike
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