I'm looking at a Hurricane deck boat with a 2002 Yamaha F200 that recently had the powerhead replaced. The engine is claimed to have had low hours and erratic use before the powerhead failed (on a sea trial to sell the boat!). Yamaha replaced the powerhead under warrantee. I've read some older posts about a similar problem with a Yamaha 4-stroke. I'm trying to understand if this is a common problem in Yamahas of this vintage.