If it's for a Merc product, don't buy anything but the Merc extended warranty. The rest of em suck. The only aftermarket extended warranty that will actually pay for anything is Formulaguard, but it's only available if you buy a Formula. the rest of the aftermarket warranty don't cover anything that actually fails. Say you have a shift cable bellows that fales, they will pay for the bellows(20 bucks) but not the shift cable that it took out with out(200 bucks) according to them corrosion ruined the shift cable and they don't cover that. corrosion did ruin the shift cable but it was cuased by the bellows tearing. Mercury's extended warranty is a little more expensive but it is the only way to go, I have even seen them cover an engine that choved a head gasket cuase the operator got a bag stuck around his drive and the motor overheated due to no raw water flow. They covered that under "customer relations" not warranty but the fact is, they took care of it. Just my opinion hope it gives you something to think about.