"including returning her from the PO rigged straight drive configuration to v-drive powered propulsion. "
Sounds like the PO replaced the entire powertrain, for better or worse. 24hp, 25hp, no big difference. There's no such thing as a Westerbleak [sic] engine anyway, they just bought engines and parts from the cheapest bidder, threw 'em all together, and generously painted everything red. Including the rubber belts and hoses that the rubber companies tell you NEVER TO PAINT.
But, if it spins up when you hit the key, and it plays nicely with others, it's an engine and that's all that matters.