63653RE: [bolger] Re: Idaho: some numbers and photos
- Jun 3, 2010
Congratulations on the launch. Very nice detail on the interior.
I run Esther Mae (Tennessee) with a four stroke 25hp and being close to the plans (double 3/8” bottom with 3/8” hull and cabin top). When first purchased the engine had been sitting for about two years. The engine started on the day of the test drive without much hassle and produced boat speeds of 12 – 14 mph with economy of 10 mpg running wide open throttle. Now at over 800 hours and in excess of 4,500 miles I regularly run at 16 mph but have not checked the economy lately. I suspect that the biggest factor in the speed is ethanol in the gasoline. I regularly run a gas preservative that is intended to eliminate buildup in the system. It is possible that over time it is still removing gunk from the carburetor. I talked with a service technician at the local Yamaha dealer and he said that with the pre 2001 models the jets in the carburetors are large enough to deal with the ethanol and that there is little that can be done to eliminate the effect of the stuff. Apparently newer models are more sensitive to the ethanol and suffer reduced performance if left sitting for very long.
Beautiful and apparently very true to the plans. I own a set of the CSD plans bought 2nd hand a few years ago. I admire the simple windshield treatment at the bow.
Except for the storage/trailering problems of a 30 footer, this seems an ideal picnic/day cruiser for several, with nice occasional camp cruising for 2 on rivers and many lakes. And one could leave off the cabin, go to a planked deck finished bright and have a bargain gentleman's speed boat, again for protected waters
IMO, without knowing more about the prop and engine rpm it is difficult to know how many of the 20hp are being used. The cabin is a major aerodynamic drag, so head/tail winds will have a big impact.
I recall the prototype having a 25hp 2 stroke Mercury on it. Those old Merc's were noted for their performance.
--- In email@example.com, Bruce Hallman <hallman@...> wrote:
> Wow! Maximo, congratulations. It is not everyday that someone
> launches a big Bolger boat, that is a heck of an accomplishment.
> On Wed, Jun 2, 2010 at 5:18 PM, Maximo <grupos@...> wrote:
> > 2nd part of the building
> > http://www.promax.com.ar/idaho/index2.htm
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