mbinkley,

You have the straight plug MT70 with cm6 plugs.


Did your engine rotate smoothly out of the box? Mine is notchy and binding at BDC. One piston is 1mm shorter than the other from the ring to the top of the piston which WILL cause imbalance in both compression and weight plus one cylinder will run hotter. There is less than 1mm of clearance on the con rods and no way oil is going to get into the needle bearings. If MT engines adds oil holes, slits or notches to new production what about the engine I bought? Am I sh!+ out of luck?

The engine bolt pattern matches the DA 50 not the DLE55. The 70s is about 35mm longer than the DL50.

If Tomy desires long term success selling engines he must tighten manufacturing tolerances and add quality control. I didn't buy this engine on price, I bought it because it would fit my cowl and it's supposed to make about the power maybe more than a DA50. I would gladly pay 30% or even 50% more for an engine that has been properly engineered with high quality materials, beta tested, has been test run at the factory, and will be upgraded free of charge like a DA.

IMO the little 1/4-32 plugs are too expensive and fragile for a serious IMAC competitor to bother with and they will not purchase this engine because of this. If Tomy wants that market he will need to copy the EVO 26GX style combustion chamber and add the heavily slanted CM6 plugs or do something similar to incorporate the cm6 plug.

I have nothing against Tomy, Jack or MT Engines. On the contrary, I wish them well. Good intentions and well wishes will not build quality engines. I have been doing a bunch reading about MT Engines. Quality control has never been a strong suit of this company.

The "s" version cylinders are a new production run yet the cylinder in the photo clearly has a poorly cast exhaust port which is one of the items I pointed out with the 35. The DLE castings are far superior and the cost is close enough MT should be rejecting such parts.