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Author Topic:   Re-powering Two 13-foot Classics

boatdryver posted 12-16-2013 10:35 AM ET (US)
Our sailing club is considering re-powering two Classic 13-foot Boston Whaler boats with new 30-HP motors. Both currently have finicky 30-year-old two-stroke-power-cycle motors that are beyond the capacity of our teenage instructors to learn to operate consistently. Our choices seem to be between 30-HP E-TEC engines weighing 177-lbs and Yamaha F30 engines weighing 214-lbs. These are teaching and safety boats usually carrying two teenage instructors. We are not interested in overpowering these boats.
Both boats are equipped with remote controls. I have yet to confirm whether shaft lengths are 15 or 20 inches. The steering station on one has been moved 180inches forward because it previously had a heavy 30-HP Suzuki four-stroke-power-cycle engine on it.
I'm looking for opinions on whether the weight saving of 37-pounds and the two stroke-stroke-power-cycle performance should strongly steer the choice to the 30-HP E-TEC for this application.
We've had mediocre reliability from a 2005 75-HP E-TEC and fine service from a 2010 40-HP E-TEC on other boats.
Thanks, JimL
jimh posted 12-16-2013 11:09 AM ET (US)
If you choose a four-stroke-power-cycle engine you will have to teach the teenagers how to change the lubricating oil in the engine. That may be a consideration in the decision, too.
Peter posted 12-16-2013 11:39 AM ET (US)
Keep the transom weight down on the 13s. 214 lbs is too much and even 177 lbs is not ideal. If I were repowering a classic 13, I would put a rope start Evinrude E-TEC 30 on it. About 150 lbs. The E-TECs start so easily that there is little need for an electric starter.
goldstem posted 12-16-2013 01:08 PM ET (US)
The Tohatsu-Mercury-Nissan-branded 25 and 30 [HP four=stroke-power-cycle outboar dengines] are very good choices. We have a 25 on our sailing club's 13-footer and, with the EFI, any fool can run them--and we do have some fools. [The engines have] been very reliable so far; they are about 180-lbs.
jimh posted 12-16-2013 02:09 PM ET (US)
How many cylinders does the Yamaha F30 have?
OMCrobert posted 12-16-2013 02:27 PM ET (US)
I recommend the 98lb 20hp EFI Suzuki. That is enough power and yet very light weight and compact.
Peter posted 12-16-2013 02:54 PM ET (US)
A Yamaha F30 has 3 cylinders and 747 cc of displacement.
In the Yamaha universe, the maximum HP that is tolerable from a transom weight perspective on the classic 13 hull is the Yamaha F25. It weighs about 175 lbs in operating form. Contrast that to the old 2-strokes, for the same 175 lbs you could have a 2-stroke Johnson 55. I've seen a few classic 13s equipped with Evinrude and Johnson 55s although I think 175 lbs on the 13's transom is too much.
For this application, I would not put a 25 or 30 HP motor on the transom that has power trim.
boatdryver posted 12-16-2013 05:56 PM ET (US)
Thanks to everyone for the input
unfortunately power trim is very desirable because at the beginning or end of a session water depth may be as little as 18 inches the final l00 ft approaching the dock. no rock, just soft mud.
These kids are plenty strong enough to rope start a 25-30 HP but I think we need a battery because of the power tilt, hence electric start. Right or wrong?
JimL
boatdryver posted 12-16-2013 06:30 PM ET (US)
Ah, but I exaggerate! how about 2 foot depth. Such are the realities of young instructors trying to get younger kids and 22 sailing dinghys back to the club on schedule on a falling tide!
Marketing for Etec states that they have a design element that somehow mitigates the effect of ingested mud on the cooling passages.
Does anyone know if this applies to the 25-30 HP series?
JimL
Peter posted 12-16-2013 06:32 PM ET (US)
I don't think you can get rope start only together with power trim. But the manual trim models of the Evinrudes have a shallow water bracket which supports the motor up to run in the shallows. They've had this feature since the 1970s. The 1977 Evinrude 35 I had on my classic 13 hull had this and I used it often to run in very shallow water. When the bracket is used, it tilts up about as high as you would be able to tilt the motor to run in the shallows if it had power trim. While they don't say to do this in the operating manual, if you flip the tilt/run lever to tilt and put the motor into reverse and give just a little burst of throttle, the motor will usually tilt up enough to engage the shallow water bracket -- a poor man's power tilt.
macfam posted 12-17-2013 07:07 AM ET (US)
We have a 13 Super sport with a 30 E-TEC, electric start and T&T.
Weight was a big consideration when deciding on re-powering.
177 lbs was the maximum I was willing to go. I originally wanted a 40 E-TEC but when I saw a 13 Sport with one, I quickly got that out of my head. 240 lbs was WAY toomuch for that hull. Static trim was truly affected.
The 30 E-TEC has been a perfect match for our varied uses.
We also have to trim the engine on a regular basis while coming into areas at low tide. If two feet is the depth, I think you'll be much better off with power T&T.

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Author	Topic: Re-powering Two 13-foot Classics
boatdryver	posted 12-16-2013 10:35 AM ET (US) Our sailing club is considering re-powering two Classic 13-foot Boston Whaler boats with new 30-HP motors. Both currently have finicky 30-year-old two-stroke-power-cycle motors that are beyond the capacity of our teenage instructors to learn to operate consistently. Our choices seem to be between 30-HP E-TEC engines weighing 177-lbs and Yamaha F30 engines weighing 214-lbs. These are teaching and safety boats usually carrying two teenage instructors. We are not interested in overpowering these boats. Both boats are equipped with remote controls. I have yet to confirm whether shaft lengths are 15 or 20 inches. The steering station on one has been moved 180inches forward because it previously had a heavy 30-HP Suzuki four-stroke-power-cycle engine on it. I'm looking for opinions on whether the weight saving of 37-pounds and the two stroke-stroke-power-cycle performance should strongly steer the choice to the 30-HP E-TEC for this application. We've had mediocre reliability from a 2005 75-HP E-TEC and fine service from a 2010 40-HP E-TEC on other boats. Thanks, JimL
jimh	posted 12-16-2013 11:09 AM ET (US) If you choose a four-stroke-power-cycle engine you will have to teach the teenagers how to change the lubricating oil in the engine. That may be a consideration in the decision, too.
Peter	posted 12-16-2013 11:39 AM ET (US) Keep the transom weight down on the 13s. 214 lbs is too much and even 177 lbs is not ideal. If I were repowering a classic 13, I would put a rope start Evinrude E-TEC 30 on it. About 150 lbs. The E-TECs start so easily that there is little need for an electric starter.
goldstem	posted 12-16-2013 01:08 PM ET (US) The Tohatsu-Mercury-Nissan-branded 25 and 30 [HP four=stroke-power-cycle outboar dengines] are very good choices. We have a 25 on our sailing club's 13-footer and, with the EFI, any fool can run them--and we do have some fools. [The engines have] been very reliable so far; they are about 180-lbs.
jimh	posted 12-16-2013 02:09 PM ET (US) How many cylinders does the Yamaha F30 have?
OMCrobert	posted 12-16-2013 02:27 PM ET (US) I recommend the 98lb 20hp EFI Suzuki. That is enough power and yet very light weight and compact.
Peter	posted 12-16-2013 02:54 PM ET (US) A Yamaha F30 has 3 cylinders and 747 cc of displacement. In the Yamaha universe, the maximum HP that is tolerable from a transom weight perspective on the classic 13 hull is the Yamaha F25. It weighs about 175 lbs in operating form. Contrast that to the old 2-strokes, for the same 175 lbs you could have a 2-stroke Johnson 55. I've seen a few classic 13s equipped with Evinrude and Johnson 55s although I think 175 lbs on the 13's transom is too much. For this application, I would not put a 25 or 30 HP motor on the transom that has power trim.
boatdryver	posted 12-16-2013 05:56 PM ET (US) Thanks to everyone for the input unfortunately power trim is very desirable because at the beginning or end of a session water depth may be as little as 18 inches the final l00 ft approaching the dock. no rock, just soft mud. These kids are plenty strong enough to rope start a 25-30 HP but I think we need a battery because of the power tilt, hence electric start. Right or wrong? JimL
boatdryver	posted 12-16-2013 06:30 PM ET (US) Ah, but I exaggerate! how about 2 foot depth. Such are the realities of young instructors trying to get younger kids and 22 sailing dinghys back to the club on schedule on a falling tide! Marketing for Etec states that they have a design element that somehow mitigates the effect of ingested mud on the cooling passages. Does anyone know if this applies to the 25-30 HP series? JimL
Peter	posted 12-16-2013 06:32 PM ET (US) I don't think you can get rope start only together with power trim. But the manual trim models of the Evinrudes have a shallow water bracket which supports the motor up to run in the shallows. They've had this feature since the 1970s. The 1977 Evinrude 35 I had on my classic 13 hull had this and I used it often to run in very shallow water. When the bracket is used, it tilts up about as high as you would be able to tilt the motor to run in the shallows if it had power trim. While they don't say to do this in the operating manual, if you flip the tilt/run lever to tilt and put the motor into reverse and give just a little burst of throttle, the motor will usually tilt up enough to engage the shallow water bracket -- a poor man's power tilt.
macfam	posted 12-17-2013 07:07 AM ET (US) We have a 13 Super sport with a 30 E-TEC, electric start and T&T. Weight was a big consideration when deciding on re-powering. 177 lbs was the maximum I was willing to go. I originally wanted a 40 E-TEC but when I saw a 13 Sport with one, I quickly got that out of my head. 240 lbs was WAY toomuch for that hull. Static trim was truly affected. The 30 E-TEC has been a perfect match for our varied uses. We also have to trim the engine on a regular basis while coming into areas at low tide. If two feet is the depth, I think you'll be much better off with power T&T.