1992 23 Walkaround Re-Power with Twin 150-HP

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Author Topic:   1992 23 Walkaround Re-Power with Twin 150-HP

tober posted 08-20-2009 02:16 PM ET (US)
Need to repower [a 1992 Boston Whaler 23 WALKAROUND]. Concerned about weight. The manual says the old [Evinrude] engines weigh 375-lbs. Any thoughts? E-TEC engines are the most likely [to be used for the re-power], but just starting the search.
jimh posted 08-21-2009 09:03 AM ET (US)
The Boston Whaler 23 WALKAROUND has a long set back bracket for engine mounting. Because of this I would be concerned about the weight of the engines, as they have a long lever arm on the hull. If the boat is kept on a trailer, I would be especially concerned. When the boat is in the water, the engine weight is compensated somewhat by the buoyancy of the engine mounting bracket. When on the trailer the engine weight is not compensated by buoyant forces, and it bears totally on the engine bracket and its attachment to the hull.
In the 150-HP engine category there are some newer models of four-cycle engines whose weight is often said to be not too much greater than direct-injection two-cycle engines. The E-TEC 150-HP engines weight 418-lbs or more, depending on shaft length. In comparison, a Yamaha F150 weighs 466-lbs or more, depending on shaft length. It would appear that the four-cycle motors will weigh at least 100-lbs more than the E-TEC motors. And the E-TEC motors will weigh at least 100-lbs more than your current motors.
Because the E-TEC 150-HP is a V6 and it is the lowest rated horsepower model for that series of motors, and because the Yamaha F150 is an in-line four-cylinder and the highest rated horsepower model for that series, I suspect the performance with the E-TEC motors will be better. However, I am going to qualify that because recently there have been reports of performance with a Yamaha F150 in which the motor appeared to develop about 275-HP, so the Yamaha F150 may be something of a "sleeper" when it comes to power output.
If your former Evinrude engines were rigged on the boat in 1992, your rigging may not be ready for the E-TEC. In c.1992 Evinrude was still using their legacy rigging components. Shortly after that, Evinrude changed their standard rigging components to a new style of wiring harnesses and connectors, the modular wiring system or MWS. They also began use of their System Check gauge. A System Check gauge is mandatory with an E-TEC. You should study you rigging to determine if it is ready for the E-TEC.
I have refitted a 2010 E-TEC to my boat which was originally rigged with a 1992 Evinrude, so I am very familiar with the process. I have described some of the details in an article:
E-TEC Rigging: A Few Notes
http://www.etecownersgroup.com/post?id=3621633
This article may be of interest to you if your boat rigging is from c.1992 and does not have the System Check and Modular Wiring System components.
msc posted 08-21-2009 05:31 PM ET (US)
My 23 WA had a notched transom with a fold down gate between cockpit and engines. The engines were Evinrude 175 spitfires and the boat would fly. If yours is configured similarly I wouldn't think an addition of a couple of hundred pounds would make much difference. If memory serves me correctly the boat weighed [4,000-lbs] dry.
gvisko posted 08-26-2009 08:07 PM ET (US)
I have a 1994 Outrage 24. I think it might be the same hull as the 23 of that year. Correct me if I am wrong. [It has] twin 150 E-TEC motors and there is no weight [problem or concern]. Tomahawk Sportfishing
6992WHALER posted 09-01-2009 11:10 PM ET (US)
My 1992 Walkaround has twin Yamaha 200-HP motors. They weigh about 420-lbs each. I would not want to add a lot more weight to her stern. With 180 gallons of fuel and gear for a family of three, the cockpit scuppers will bring water in to the cockpit when you stand in either far corner of the stern.
njwhalerman posted 09-09-2009 01:55 PM ET (US)
I have a [1992 23 Walkaound with] notched transom and [twin 150-HP 1996] Oceanrunner motors. Weight was about 450-lbs each. Upgraded to single 250-HOP E-TEC in [2007]; best thing I did, no more water over the transom, scuppers out of the water, 450-lbs less, gas and fuel way down, and relatively same speed.

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Author	Topic: 1992 23 Walkaround Re-Power with Twin 150-HP
tober	posted 08-20-2009 02:16 PM ET (US) Need to repower [a 1992 Boston Whaler 23 WALKAROUND]. Concerned about weight. The manual says the old [Evinrude] engines weigh 375-lbs. Any thoughts? E-TEC engines are the most likely [to be used for the re-power], but just starting the search.
jimh	posted 08-21-2009 09:03 AM ET (US) The Boston Whaler 23 WALKAROUND has a long set back bracket for engine mounting. Because of this I would be concerned about the weight of the engines, as they have a long lever arm on the hull. If the boat is kept on a trailer, I would be especially concerned. When the boat is in the water, the engine weight is compensated somewhat by the buoyancy of the engine mounting bracket. When on the trailer the engine weight is not compensated by buoyant forces, and it bears totally on the engine bracket and its attachment to the hull. In the 150-HP engine category there are some newer models of four-cycle engines whose weight is often said to be not too much greater than direct-injection two-cycle engines. The E-TEC 150-HP engines weight 418-lbs or more, depending on shaft length. In comparison, a Yamaha F150 weighs 466-lbs or more, depending on shaft length. It would appear that the four-cycle motors will weigh at least 100-lbs more than the E-TEC motors. And the E-TEC motors will weigh at least 100-lbs more than your current motors. Because the E-TEC 150-HP is a V6 and it is the lowest rated horsepower model for that series of motors, and because the Yamaha F150 is an in-line four-cylinder and the highest rated horsepower model for that series, I suspect the performance with the E-TEC motors will be better. However, I am going to qualify that because recently there have been reports of performance with a Yamaha F150 in which the motor appeared to develop about 275-HP, so the Yamaha F150 may be something of a "sleeper" when it comes to power output. If your former Evinrude engines were rigged on the boat in 1992, your rigging may not be ready for the E-TEC. In c.1992 Evinrude was still using their legacy rigging components. Shortly after that, Evinrude changed their standard rigging components to a new style of wiring harnesses and connectors, the modular wiring system or MWS. They also began use of their System Check gauge. A System Check gauge is mandatory with an E-TEC. You should study you rigging to determine if it is ready for the E-TEC. I have refitted a 2010 E-TEC to my boat which was originally rigged with a 1992 Evinrude, so I am very familiar with the process. I have described some of the details in an article: E-TEC Rigging: A Few Notes http://www.etecownersgroup.com/post?id=3621633 This article may be of interest to you if your boat rigging is from c.1992 and does not have the System Check and Modular Wiring System components.
msc	posted 08-21-2009 05:31 PM ET (US) My 23 WA had a notched transom with a fold down gate between cockpit and engines. The engines were Evinrude 175 spitfires and the boat would fly. If yours is configured similarly I wouldn't think an addition of a couple of hundred pounds would make much difference. If memory serves me correctly the boat weighed [4,000-lbs] dry.
gvisko	posted 08-26-2009 08:07 PM ET (US) I have a 1994 Outrage 24. I think it might be the same hull as the 23 of that year. Correct me if I am wrong. [It has] twin 150 E-TEC motors and there is no weight [problem or concern]. Tomahawk Sportfishing
6992WHALER	posted 09-01-2009 11:10 PM ET (US) My 1992 Walkaround has twin Yamaha 200-HP motors. They weigh about 420-lbs each. I would not want to add a lot more weight to her stern. With 180 gallons of fuel and gear for a family of three, the cockpit scuppers will bring water in to the cockpit when you stand in either far corner of the stern.
njwhalerman	posted 09-09-2009 01:55 PM ET (US) I have a [1992 23 Walkaound with] notched transom and [twin 150-HP 1996] Oceanrunner motors. Weight was about 450-lbs each. Upgraded to single 250-HOP E-TEC in [2007]; best thing I did, no more water over the transom, scuppers out of the water, 450-lbs less, gas and fuel way down, and relatively same speed.