Landon Engine Building
Member
Have any of you seen this new Duromax 274cc engine?
I just discovered it last night, it looks more similar to small block than a big block, it looks to have the typical 6 bolt side cover of a small block, and the mounting pattern is the same as a small block. On the other hand it has the 1” output shaft of a big block.
According to Duromax it weighs 42 pounds, compare that to a Predator 212, which according to Harbor Freight weighs 34 pounds, a predator 301 weighs 57 pounds according to HF, a Honda GX270 weighs 25.8 kg, which equates to 57 pounds.
As for bore / stroke, Duromax claims a 75mm bore and 62mm stroke, a Honda GX270 has a 77mm bore and 58mm stroke. So this new engine has a smaller bore but a longer stroke than GX270, it also weighs quite a bit less than a GX270.
So, I don’t know what to think, is it big block or is it a small block? Looks and weighs similar to a small block, but has the 1” shaft of a big block. Either way pretty interesting.
It’s also worth noting, that on GFO’s website the description states:
“The DuroMax XP9HP is one of our most compact and lightweight engines available”…
The website also shows it on a mini bike a couple times, perhaps they were trying to make an engine that would be more compact for those kinds of applications.
Here’s the links to Duromax and GFO, if anyone wants to check it out.
Duromax: https://www.duromaxpower.com/collec...274cc-25mm-shaft-recoil-start-gasoline-engine
GFO: https://www.generatorfactoryoutlet....274cc-25mm-shaft-recoil-start-gasoline-engine
I just discovered it last night, it looks more similar to small block than a big block, it looks to have the typical 6 bolt side cover of a small block, and the mounting pattern is the same as a small block. On the other hand it has the 1” output shaft of a big block.
According to Duromax it weighs 42 pounds, compare that to a Predator 212, which according to Harbor Freight weighs 34 pounds, a predator 301 weighs 57 pounds according to HF, a Honda GX270 weighs 25.8 kg, which equates to 57 pounds.
As for bore / stroke, Duromax claims a 75mm bore and 62mm stroke, a Honda GX270 has a 77mm bore and 58mm stroke. So this new engine has a smaller bore but a longer stroke than GX270, it also weighs quite a bit less than a GX270.
So, I don’t know what to think, is it big block or is it a small block? Looks and weighs similar to a small block, but has the 1” shaft of a big block. Either way pretty interesting.
It’s also worth noting, that on GFO’s website the description states:
“The DuroMax XP9HP is one of our most compact and lightweight engines available”…
The website also shows it on a mini bike a couple times, perhaps they were trying to make an engine that would be more compact for those kinds of applications.
Here’s the links to Duromax and GFO, if anyone wants to check it out.
Duromax: https://www.duromaxpower.com/collec...274cc-25mm-shaft-recoil-start-gasoline-engine
GFO: https://www.generatorfactoryoutlet....274cc-25mm-shaft-recoil-start-gasoline-engine