I dont know anything about that stuff
Comments
I see Skoops answered most of it but I thought I'd mention that the "can it be converted" part is very nebulous since it depends on what resources you have and how much you're willing to invest in it. If you have a lot of wood and enough time/resources you could set up a heat source similar to ye olde blacksmith forge - but this would require a much, much bigger crew to operate and have a whole bunch of drawbacks.
Basically ships were usually built to a suitable weight etc for their power source so any change is going to make a dramatic decrease in efficiency - so if necessity called for you to adapt some steam paddlers etc and it was a long term project, part of it would be looking for opportunities to reduce weight etc.
I figured, and yeah that was worded a bit too vague haha didn't want to give anything away, just needed some insights, like the one you and skoops gave me, so thank you!
Skoops
As long as you have a furnace, you could theoretically get a coal engine going with wood for a while, until your pipes clog up with soot and you've got more ash than hot coals in there. The major bottleneck is just that coal burns hotter than wood, full stop. You're never going to get the same output even if you're correcting for the efficiency differential and have a small forest on deck ready to burn. I think you could maybe get a WWI Destroyer moving, but if we're talking about anything heavier (like a battleship), you might have a problem producing enough force to get those propellers spinning at any speed that could fight the tides. Can't say I've been at liberty to try it myself though, so hey, who knows.
As for converting an oil burner engine to a wood engine, that's a bit less possible. WWI oil burner engines were essentially big flamethrowers bolted to the floor, pointed into a boiler. There's no place for wood to go. Note that WWII warships were nearly all running on relatively advanced oil, diesel or gasoline engines; you're in a whole other ballpark by that point.
Sevi
Thank you, this is helpful, basically a lot of trouble for it to barely work, if at all. Might make more sense to outfit a turn of the century battleship with sails, and use what little fuel you have left to operate the hydraulic systems.