Komatsu Zenoah EB7000 and HBZ2600

Low emissions, low vibration and low fuel consumption; yet these two blowers have power to spare. What's more, they are very easy to use.

Model EB7000 claims to be the world’s most powerful backpack blower — though we reckon it’s up against some competition from Echo. The EB7000 has a 62cc Zenoah engine and a fresh flow air filter system. A double air filter reduces any noise on exit.
“I’m really impressed with the power of this blower,” says one tester. “It’s got a really good fan and is ideal if you need to move a lot of debris and litter.”
But while the EB7000 is his favourite, the tester admits he also likes the smaller, handheld HBZ2600. “As a handheld blower, this one is very powerful. And it’s comfortable to hold.”
The HBZ2600 is fitted with a 25.4cc Strato-charged Zenoah engine. It’s still a two-stroke and it has no catalytic converter. Yet it complies with the stringent California Air Regulation Board (CARB) rules. And, surprisingly, there seems to be no trade off in terms of extra weight or loss of power. The advantages of a two-stroke machine — the high power-to-weight ratio, the simple construction and low cost — are kept. The added advantage comes in terms of a 73 per cent reduction in hydro carbon emissions and 30 per cent improved fuel efficiency.
The operating principle behind the Zenoah Strato-charged engine is simple: fresh air flows into the cylinder from the air inlet port and expels the burnt gases so the mixture gas isn’t exhausted and is used effectively for the next firing. The chamber and spark-plug positioning ensures highly stable combustions without misfiring and an exhaust that is one-third cleaner than previous levels.

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