QUOTE="Ted Pinelli, post: 1261115, member: 72343"]I currently have a Wilcox Crittenden manual flush head on our 2003 Catalina 310. Any suggestions on a replacement head that has an electric flush? Looking for something that is compatible to existing plumbing that does not require huge retrofit to install. Ted Pinelli[/QUOTE]
Check out the Raritan SeaEra
Raritan SeaEra which Practical Sailor rated the best "budget" electric macerating toilet. It's available as either a complete toilet or a "conversion" that allows you to re-use your existing bowl, seat and lid (your W-C bowl WILL fit)
SeaEra Conversion Kit.
You would have to drill new mounting bolt holes and fill existing ones, and you'd also have to run a new dedicated circuit (both of which you'd have to do no matter what electric toilet you choose). You should be able to use your existing plumbing.
Don't even THINK of going with the Jabsco 29200 electric "conversion" that only replaces the manual pump with an electric macerating pump. Even Jabsco admits it's a very poor excuse for an electric toilet...it's noisy, power hungry--draws almost twice as many amps as any other electric toilet..."chokes" easily, and costs considerably more than any other electric "conversion."
If you decide to stick with a manual toilet, this would be your best choice by far:
Raritan LBA Upgrade for almost any toilet
I'll be glad to answer any questions after you've have a chance to check all this out.