Can you identify this nitro engine?

[dtb78d]

What size is this, no markings, and a 26 makes it look small! I don't know what size to order

 

[Jam Racing 1]

Most likely a .18

 

[dtb78d]

is there any way to tell for sure?

Most likely a .18

 

[dtb78d]

I have another question I'm new to this is there another engine that I could buy that I could use my parts off the old engine . .b And can I go like one size bigger on the motor and still use my old parts or no?

 

[Jam Racing 1]

https://www.hobbytown.com/nitro-star-g3.0-engine-w-pull-start-by-hpi-racing-hpi15105/p55855

that is the same you have in your pics, so I am reasonably sure yours is an .18

https://www.hpiracing.com/assets/images/kits/101400/g30engine.jpg

 

[Jam Racing 1]

I have another question I'm new to this is there another engine that I could buy that I could use my parts off the old engine . .b And can I go like one size bigger on the motor and still use my old parts or no?

Since you say you are new to this I would honestly just go with another 3.0, is a direct fit and your flywheel and clutch parts will interchange easily to the new