YACHTWIN or SAILMASTER

[Seakindly]

Hello folks, this is my first post, so please forgive me if this is the wrong forum.<br /><br />I have been trying to find out more about these so called "high thrust" outboards that were produced by Evinrude and Johnson for sailboats. I have searched this board, as well as the net, and have not found the answer to my question.<br /><br />What I am trying to determine is -- Do these motors have a different gear ratio, like the high thrust Yamahas and Mercury Bigfoot motors?? I know that they are able to use a higher diameter and lower pitch prop than my "regular" 9.9 Evinrude. I hope someone that is familiar with these motors can set me straight on this. Also, if they do have different gearing for high thrust performance -- what years were they made this way??<br /><br /> I would like to buy a used one in good condition, but would consider a new one if they are still made by Bombardier.<br /><br />Bottom line is I want a true "high thrust" motor for use as a kicker on a heavy ocean-going 21 footer, and I would prefer to stay with Evinrude or Johnson cause I have owned several and they have never let me down. 2 stroke or 4 stroke is of secondary importance to "high thrust". <br /><br />Thanks

 

[Seakindly]

Re: YACHTWIN or SAILMASTER

Hello??<br /><br />Anybody home??

 

[BillP]

Re: YACHTWIN or SAILMASTER

I just looked at the factory spec sheet for a mid 90s 8hp Johnson Sailmaster. Gearing is identical to the standard 8hp version @ 13:29.<br /><br />The only difference is length of shaft and different prop. The sailmaster prop is 9.25 diameter x 6.5 pitch VS the regular version prop at 8.5 diameter x 9" pitch. Bigger and flatter is where they are getting the low speed punch without cavitation.<br /><br />The Evinrude spec sheet shows the same numbers for their 8hp motors.

 

[Vic.S]

Re: YACHTWIN or SAILMASTER

I have a 1984 Evinrude sales brochure (and a 1984 6hp Yachtwin). There is no mention of gear ratios but the Yachtwins had different props to the standard engines, came with 508mm shaft length on the 6 and 635mm on the 8 and 9.9. The exhaust outlet was above the prop, rather than behind it, to give better performance in reverse.<br /><br />The standard props fitted to the Yatchtwins were 23.5 x16.5 cm, for the 6 and the 8 and 24.1 x 25.4 cm for the 9.9. The props fitted to the standard engines were 21.6 x 22.9 cm and 23.5 x 20.3 cm. That looks like larger diameter and smaller pitch for the 6 an 8 but not for the 9.9. so make of that what you can. <br /><br />Incidentally the 6 is adequate for my 19ft sailing boat. I have had a recurring problem with the cooling system in that corrosion around a rubber grommet at the top of the water inlet pipe causes the grommet to be squeezed over the top of the pipe cutting off the water flow. I've modified it now so hopefully it won't occur again.

 

[Seakindly]

Re: YACHTWIN or SAILMASTER

BillP and Vic.S, thank you for your replies.<br /><br />Although that is not what I wanted to hear about the gear ratios, it is what I suspected.<br /><br />If anyone has any further info, I am all ears.<br /><br />It is too bad that Bombardier has decided to forfeit this market niche to Yamaha and Mercury, at this time. I understand that Yamaha and Mercury are doing very well with their sales of their true "high thrust" motors. I don't even think that Johnson is selling a Sailmaster model nor Evinrude a Yachtwin model, these days.<br /><br />Shame, as that is the right tool for the job (kicker on a oceangoer or a sailboat's primary powerplant).