You know some of the funny part about trying to deal with China engine manufactures is I have talked to a lot of them about just selling me the parts and I would do the assembly here.
I have the time and enjoy doing it and also know they are assembled right.
With the right tools and knowledge you can assemble a engine with taking your time in about 30 minutes, It takes me longer to mount and test run a engine than it does to assemble one, Mount it, install muffler, Install the prop, Test run and set the needles seems to take me a while to do and make sure all is right.
Well for some reason, None of them want to do it or either they will price the parts to where they are more than the cost of a assembled engine. ???
The things you have to look for seem to be common in all of them, Striped threads in cases or hall sensor mounting, Threads not cut beep enough to let bolts tighten all the way down, Pistons installed backwards, Prop hub bolts striped out, timing not set right, Carbs that will not draw fuel, Gaskets not installed and a few more I can not think about right now.
Just seems like a lot of them think as long as they are put together, Ship them.
The funny thing also is they know the threads are striped when they assemble the engine because they will use something that looks like CA glue, Like they put it in the striped thread s and just push the bolt in, First time you go to test or tighten it the bolts comes out will all the I guess CA glue still mounted to it.
I have found one company that will sell me parts that are a spin off of DLE parts, I call the engine a DLE-C for DLE clone Lol.
So far have had pretty good luck with it but just have not advertised it much until I make they are going to work out.
When I get the parts there are some that I do not use because of light casting flows and other minor detail that makes them not look up to par, I take those parts and build engines for local guys I know that just want a good running cheap engine that I know will not blast me for every little detail about them.