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Old 06-01-2010
Lazlow Lazlow is offline
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Well I took a look around;

Yanmar 3ym30 (30HP)($2.3k without saildrive)
3600 rpm
22hx29lx18w
346lbs (dry)
1.5gal/hr full out

Yanmar 9ny(9Kw)($8k)
1800rpm
22hx33lx19w
433lbs
.9gal/hr


So size is essentially a wash. Generator is 100lbs heavier but also uses quite a bit less fuel(~.6gal/hr). Price tag hurts at over three times the price, but you are also comparing a 1800 vs 3600 rpm motor(lives twice as long).

The THOOSA 9000(9kw drive) is also $8k,requires 48V, and weighs 50lbs.
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