Forum Discussion
N9WOS
Feb 12, 2011Explorer
And I have also run across a little difference in how briggs and Honda rate their engines.
When I seen that a 11hp OHV Honda has 337cc and a 11 hp OHV Briggs has 391cc, I decided to dig a little bit more. I found out that Honda rates their engines in some form of gross horsepower measurement. On a few sites I found the actual net ratings for the normal line of Honda engines.
The 11HP Honda is actually 9.5HP.
If you do the math……… (9.5hp/337cc)391cc=11.022.
That closely correlates with the Briggs rated horsepower, which means they are rating theirs in net HP.
So…….. Honda engines….. real horsepower……
Model, rated HP, real HP.
GX100 3HP 2.5HP
GX120 4HP 3.5HP
GX160 5.5HP 4.8HP
GX200 6.5HP 5.5HP
GX240 8HP 7.1HP
GX270 9HP 8HP
GX340 11HP 9.5HP
GX390 13HP 11HP
GX610 18HP 16.6HP
GX620 20HP 18.1HP
GX670 24HP 20.5HP
So…….If you had a10HP briggs engine, and you wanted to buy a Honda engine that will be guarantied to have at least the same continuous capacity as the briggs, you need to buy a 13HP Honda engine.
Conversely, a Briggs generator with a 5.5HP engine should be able to handle the same items as a Honda with a 6.5HP engine.
Some of the china clone engines are using the net horsepower, and some are using the gross horsepower. That is why some have the 98cc engine listed as 2.5HP and some have it listed as 3HP.
When I seen that a 11hp OHV Honda has 337cc and a 11 hp OHV Briggs has 391cc, I decided to dig a little bit more. I found out that Honda rates their engines in some form of gross horsepower measurement. On a few sites I found the actual net ratings for the normal line of Honda engines.
The 11HP Honda is actually 9.5HP.
If you do the math……… (9.5hp/337cc)391cc=11.022.
That closely correlates with the Briggs rated horsepower, which means they are rating theirs in net HP.
So…….. Honda engines….. real horsepower……
Model, rated HP, real HP.
GX100 3HP 2.5HP
GX120 4HP 3.5HP
GX160 5.5HP 4.8HP
GX200 6.5HP 5.5HP
GX240 8HP 7.1HP
GX270 9HP 8HP
GX340 11HP 9.5HP
GX390 13HP 11HP
GX610 18HP 16.6HP
GX620 20HP 18.1HP
GX670 24HP 20.5HP
So…….If you had a10HP briggs engine, and you wanted to buy a Honda engine that will be guarantied to have at least the same continuous capacity as the briggs, you need to buy a 13HP Honda engine.
Conversely, a Briggs generator with a 5.5HP engine should be able to handle the same items as a Honda with a 6.5HP engine.
Some of the china clone engines are using the net horsepower, and some are using the gross horsepower. That is why some have the 98cc engine listed as 2.5HP and some have it listed as 3HP.
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