OTL they were repealed in 1849, so pushing it forward this far seems like a stretch, but I honestly don't know how prevalent mercantilism was immediately before the ARW. The Navigation Acts distorted the Colonial economies a lot and inhibited (or prohibited) industry, even if the per capita tax burden wasn't that high. I really can't figure out how much they benefited (or were perceived to benefit) Britain at this time, though.
My thinking is that the repeal of the Navigation Acts would have been so painful to merchants in Britain that it would have been impossible to repeal, keeping the mother country/colony dynamic ingrained. However, I'm hoping someone can show me something to the contrary.
I don't see a good thread on this - economics is so boring compared to granting political representation.