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Author Topic:   1968 Sakonnet: Mercury 60-HP Four-stroke

Bensjoy posted 10-28-2006 01:03 PM ET (US)
Has anyone re-powered their pre-1975 17-foot Whaler with a new Mercury 60-HP 4-Stroke? I'm interested to know the performance.
Dick posted 10-28-2006 08:46 PM ET (US)
I had a 17 Montauk with a Merc 50 4 stk and it performed well for me. I now have a 150 Montauk with the 60 4 stk and it is awsome. I think it would be a great engine on a 17.
elaelap posted 10-29-2006 10:06 AM ET (US)
On the advice of our local dealership, I repowered my first Whaler, an old Katama 16, with a Yamaha 50 hp High Thrust and swiftly put 360 hours on the rig, loving every minute of it. No great top end speed (30 mph), but on plane almost instantly at ten or twelve mph, amazing fuel economy, silent and smokeless operation, and not one problem in the year and a half I owned the boat. That rig is now owned and heavily used by CW member Steve/17 Bodega, who's put another +/-500 hours on it without a complaint. In fact, I saw him yesterday coming back in with a pal and three rare-for-this-late-season salmon on board, that little motor chuggin' along like nobody's business. The Yamaha sixty 4/s HT EFI (or maybe Merc's equivilent engine) would be my very first choice for a smirkless classic 16 (at least for my kind of use--fishing alone or with one other person in the often lumpy Pacific north of San Francisco).
Tuco
roloaddict posted 10-29-2006 11:02 AM ET (US)
The Yamaha 60 HT is the motor I plan on installing this winter on my Katama.
BlackMax posted 10-29-2006 12:22 PM ET (US)
Since 2003 models, Yamaha 40,50,60 are made with short block powerheads designed and manufactured by Mercury, from the China plant, and previously from WI. Merc put EFI/Smartcraft on them, but Yam only used carbs til recently. Check out identical specs. You'll know Yamaha has developed their own blocks when the bore and stroke change, which will happen at some point in the future.
jimh posted 10-30-2006 01:57 AM ET (US)
Aren't those 40/50/60-HP engines the joint-venture engines that Yamaha and Mercury partnered to develop as their first four-strokes? As I recall from the testimony before the United States International Trade Commission, the block was a casting initially made by Mercury, their part of the deal, and Yamaha developed the cylinder head, valves, and overhead cams.
The joint venture ran for about five years, and when it was over both Yamaha and Mercury continued to manufacture the engine. It has never been entirely clear to me if the two former partners continue to sell each other components for the engine. Given their current relationship, it seems somewhat unusual for such cooperation.

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Author	Topic: 1968 Sakonnet: Mercury 60-HP Four-stroke
Bensjoy	posted 10-28-2006 01:03 PM ET (US) Has anyone re-powered their pre-1975 17-foot Whaler with a new Mercury 60-HP 4-Stroke? I'm interested to know the performance.
Dick	posted 10-28-2006 08:46 PM ET (US) I had a 17 Montauk with a Merc 50 4 stk and it performed well for me. I now have a 150 Montauk with the 60 4 stk and it is awsome. I think it would be a great engine on a 17.
elaelap	posted 10-29-2006 10:06 AM ET (US) On the advice of our local dealership, I repowered my first Whaler, an old Katama 16, with a Yamaha 50 hp High Thrust and swiftly put 360 hours on the rig, loving every minute of it. No great top end speed (30 mph), but on plane almost instantly at ten or twelve mph, amazing fuel economy, silent and smokeless operation, and not one problem in the year and a half I owned the boat. That rig is now owned and heavily used by CW member Steve/17 Bodega, who's put another +/-500 hours on it without a complaint. In fact, I saw him yesterday coming back in with a pal and three rare-for-this-late-season salmon on board, that little motor chuggin' along like nobody's business. The Yamaha sixty 4/s HT EFI (or maybe Merc's equivilent engine) would be my very first choice for a smirkless classic 16 (at least for my kind of use--fishing alone or with one other person in the often lumpy Pacific north of San Francisco). Tuco
roloaddict	posted 10-29-2006 11:02 AM ET (US) The Yamaha 60 HT is the motor I plan on installing this winter on my Katama.
BlackMax	posted 10-29-2006 12:22 PM ET (US) Since 2003 models, Yamaha 40,50,60 are made with short block powerheads designed and manufactured by Mercury, from the China plant, and previously from WI. Merc put EFI/Smartcraft on them, but Yam only used carbs til recently. Check out identical specs. You'll know Yamaha has developed their own blocks when the bore and stroke change, which will happen at some point in the future.
jimh	posted 10-30-2006 01:57 AM ET (US) Aren't those 40/50/60-HP engines the joint-venture engines that Yamaha and Mercury partnered to develop as their first four-strokes? As I recall from the testimony before the United States International Trade Commission, the block was a casting initially made by Mercury, their part of the deal, and Yamaha developed the cylinder head, valves, and overhead cams. The joint venture ran for about five years, and when it was over both Yamaha and Mercury continued to manufacture the engine. It has never been entirely clear to me if the two former partners continue to sell each other components for the engine. Given their current relationship, it seems somewhat unusual for such cooperation.