When they are produced, the A/A piston/sleeve and other parts will fit the MAC engines.
This will be the case for the A/A 67 and the 84. Many people with MAC 45 engines have been able to keep running their old Mac 45 using the new A/A piston and sleeves.
There will be some changes to the A/A as compared to the MAC engines, but with so many people having good luck with the MAC engines, why buy new when you can keep the old MAC engines running?
The major problem today is that the Euro has been around $1.40 to $1.55. That means an expensive engine made in Italy today. When the MAC engines first started, we were able to buy Euros for less than $0.90.
That is one reason why the MAC engines were such a good deal.
I do not want to bring out a new engine that has to be priced at $600.00 or more. The idea is to keep model boating as economical as possible. That is why I will have them produced at a minimum of 100 engines at a time as that also reduces the overall price.
Please be patient.
Al Hobbs