I just got a 1993 Mac 19 last week and - as a non-sailor with a lot of powerboat experience - I was pretty disappointed with the performance from the engine - a 25hp Yamaha 2 stroke. I haven't checked the prop size or what the revs are at WOT; also, the carbs could be manky or the fuel "stale", or the plugs fouled. All of these delights await me once the rain stops. However, I was wondering whether you had a view on whether a 25hp - which appears to have been the standard configuration in the UK - is man enough to get a 19 up on the plane? In a slightly different context I inadvertantly managed to launch the boat without dropping the rudders first and therefore found steering to be a wonderfully graceful experience. Even with the rudders down, I bet slow-speed handling is slightly awkward, and I wondered if there was a general view on connecting the outboard to the tiller arm? Does this make the steering ridiculously heavy under sail? Would be grateful for any views
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25HP
25 Hp seems way too much for a Mac 19. Do you mean a 2.5Hp? Mac 19 is not built for going on plane. At least not under power. The new Mac M is built for motor sailing. It will go up on plane under power. The older smaller Mac's and Ventures are sail boats, and the engine is just a kicker for when the wind dies, or you need to go straight into the wind or there isn't enough room to sail.
25 Hp seems way too much for a Mac 19. Do you mean a 2.5Hp? Mac 19 is not built for going on plane. At least not under power. The new Mac M is built for motor sailing. It will go up on plane under power. The older smaller Mac's and Ventures are sail boats, and the engine is just a kicker for when the wind dies, or you need to go straight into the wind or there isn't enough room to sail.
Underpowered ?
Andrew, Gregg is right, Your sail boat probably has a hull speed of about 5-6 mph or there abouts, It is very stressful to a sailboat to go faster than the hull speed with a motor. I have a VN 23 with a Yamaha 8 on it and its plenty of power when I need it. The Idea is to get you where you need to be when the wind dies or just to motor around for fun but You would not be looking for powerboat performance with an older boat primarily designed for sailing. The motor sailors are a whole different thing..If you have a 2.5 motor on there it would not be enough for your needs.It would work in calmer conditions but eventually you would get into a situation where it wouldn,t do you much good... .Smitroe
Andrew, Gregg is right, Your sail boat probably has a hull speed of about 5-6 mph or there abouts, It is very stressful to a sailboat to go faster than the hull speed with a motor. I have a VN 23 with a Yamaha 8 on it and its plenty of power when I need it. The Idea is to get you where you need to be when the wind dies or just to motor around for fun but You would not be looking for powerboat performance with an older boat primarily designed for sailing. The motor sailors are a whole different thing..If you have a 2.5 motor on there it would not be enough for your needs.It would work in calmer conditions but eventually you would get into a situation where it wouldn,t do you much good... .Smitroe
this may help
The Mac 19 is a Powersailor capable of planing. They usually are fitted with anything from an 8-40HP motor. The manual says they are capable of 25MPH with 40HP. You probably need a tune-up to improve your experience. http://www.dougpile.com/mac19/sales.html
The Mac 19 is a Powersailor capable of planing. They usually are fitted with anything from an 8-40HP motor. The manual says they are capable of 25MPH with 40HP. You probably need a tune-up to improve your experience. http://www.dougpile.com/mac19/sales.html
I don't think 25hp
I don't think 25hp is enouogh to get a 19 to plane. You'll just ride the bow wave all day long. 40hp will do much better. Oh, and the 19 was the first MacGregor power sailer. It was the prototype for the 26X. The only power sailors (those that can be motored over 20 knots) were the 19 (1993 - 1995), 26X (1995 - 2003) and 26M (2003 - ). Happy sails *_/), MArk
I don't think 25hp is enouogh to get a 19 to plane. You'll just ride the bow wave all day long. 40hp will do much better. Oh, and the 19 was the first MacGregor power sailer. It was the prototype for the 26X. The only power sailors (those that can be motored over 20 knots) were the 19 (1993 - 1995), 26X (1995 - 2003) and 26M (2003 - ). Happy sails *_/), MArk
What I have learned this week...
Good morning all I changed the prop and went from 3900rpm @ WOT to 5025rpm @WOT, with a top speed on 12.5mph up on the plane. This is better, but we are not there yet, as the stats imply a large amount of slippage and a theoretical maximum of around 18 mph, all things considered In the near future I will be fitting a Permatrim hydrofoil in order to try to get up on the plane quicker and increase traction / reduce slippage. The engine will also be serviced later this week. I am hoping for about 500 rpm more at WOT and maybe 3mph faster. However, my engine is slung too low down, with the cavitation plate 3 inches below the hull, and I am therefore considering fitting a jack plate in order to reduce drag. Once these changes have been made I am hoping that WOT will give closer to the manufacturers spec of 5,500 rpm, at which point I may fit a coarser prop or - possibly - a Dual Thrust with a wider diameter (if slippage is still a big problem). This is proving to be an interesting experiment - and art rather than a science All the best Andrew
Good morning all I changed the prop and went from 3900rpm @ WOT to 5025rpm @WOT, with a top speed on 12.5mph up on the plane. This is better, but we are not there yet, as the stats imply a large amount of slippage and a theoretical maximum of around 18 mph, all things considered In the near future I will be fitting a Permatrim hydrofoil in order to try to get up on the plane quicker and increase traction / reduce slippage. The engine will also be serviced later this week. I am hoping for about 500 rpm more at WOT and maybe 3mph faster. However, my engine is slung too low down, with the cavitation plate 3 inches below the hull, and I am therefore considering fitting a jack plate in order to reduce drag. Once these changes have been made I am hoping that WOT will give closer to the manufacturers spec of 5,500 rpm, at which point I may fit a coarser prop or - possibly - a Dual Thrust with a wider diameter (if slippage is still a big problem). This is proving to be an interesting experiment - and art rather than a science All the best Andrew
Is "go-fast" your purpose?
It wasn't mine - so I bought a brand-new Tohatsu 9.8-hp engine to power the Beija-Flor. Honestly, I think I'd have been just as well off with a 4-hp kicker. I get nearly the same speed at 35% of throttle as I do with full throttle. Maybe I'm cavitating ... maybe I need to drain, or push out, the water ballast -- maybe I ought to have paid the extra $3000 or so for a 40-hp engine, if I'd wanted to go fast. If I want the go-fast power, I can still afford it ... later in the season, or maybe next year. But is go-fast the reason I got into sailing?
It wasn't mine - so I bought a brand-new Tohatsu 9.8-hp engine to power the Beija-Flor. Honestly, I think I'd have been just as well off with a 4-hp kicker. I get nearly the same speed at 35% of throttle as I do with full throttle. Maybe I'm cavitating ... maybe I need to drain, or push out, the water ballast -- maybe I ought to have paid the extra $3000 or so for a 40-hp engine, if I'd wanted to go fast. If I want the go-fast power, I can still afford it ... later in the season, or maybe next year. But is go-fast the reason I got into sailing?
Go faster
Hi - no, speed is not the key; however, if I had wanted only a pure sailing boat, I wouldn't have bought a MacGregor and, now that I have a Macgregor (with which I'm very happy) I'd like to think I am getting the best out of it! The reason that I am not planing at 18 mph is not due to the fact that I don't have 45hp engine, but because my otherwise capable Yamaha 25 isn't set up on the boat properly. Clearly, if I was to put a Pratt & Whitney aero engine on the back, I might go even faster, but that is not what this is all about - I am just trying to make the best of what I have. Since the last message neither the Jack Plate nor the Permatrim hydrofoil have arrived in the mail and I have as yet had no opportunity to see what difference they make or - for that matter - to see how the 19 sails. On this last topic, does anyone have any views or experience of Lazyjacks and/or a furling foresail on a 19? All the best Andrew
Hi - no, speed is not the key; however, if I had wanted only a pure sailing boat, I wouldn't have bought a MacGregor and, now that I have a Macgregor (with which I'm very happy) I'd like to think I am getting the best out of it! The reason that I am not planing at 18 mph is not due to the fact that I don't have 45hp engine, but because my otherwise capable Yamaha 25 isn't set up on the boat properly. Clearly, if I was to put a Pratt & Whitney aero engine on the back, I might go even faster, but that is not what this is all about - I am just trying to make the best of what I have. Since the last message neither the Jack Plate nor the Permatrim hydrofoil have arrived in the mail and I have as yet had no opportunity to see what difference they make or - for that matter - to see how the 19 sails. On this last topic, does anyone have any views or experience of Lazyjacks and/or a furling foresail on a 19? All the best Andrew
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