Captain Hal wrote: ... When I was shopping last year, I had gotten a quote from Boat US on a 26M with 60 HP; they quoted it allright; when I spoke to the underwriter, they wanted the quote number so they could invalidate it. Don't want to make waves for all the big engine owners but I'm mystified; I'm still a prospective Macgregor owner; ... Still looking for that elusive insurance underwriter...
Hmmmm - Capt, are you in USA or Canada? Not that it should matter, though.
Exactly WHY are you speaking to an Underwriter? ... anyhow, seems the
wrong underwriter!
Or, maybe you're
overthinking this problem?
I have "quoted" insurance for my Macgregor 26X on the BoatUS website numerous times. I identify it as a sailboat with a 60 hp motor. There's never been ANY question about coverage. (
Pls note that most small sailboats would have a 10 or 15, not a 60 hp ... but, this reality has NEVER occasioned any contact from BoatUS.)
I have "booked" the insurance twice onLine, the second time after letting it lapse (having overlooked the annual premium). In both cases the onLine quote has been < $200 per year, including West coastal, plus inland waters. The extension to inland waters req'd a simple phone call (to clerk, not underwriter) plus an annual bump of about 20 bucks.
The BoatUS onLine application has Macgregor 26 as a pre-selection, doesn't it? There is nowhere in that onLine application to enter a "mfg recommended" horsepower, for ANY boat, is there?
(Note well, Macgregor DOES NOT publish a "horsepower rating," rather "a recommendation." Further, I've never read of Macgregor performing hull warranty coverage, for ANY reason.) I'm not alone in this insurance endeavor .... there must be a hundred of other Mac 26 owners who have done
exactly as I have.
- BoatUS sends a good faith quote based upon THEIR application form.
- Send them a check & your coverage is BOUND!
- Forget or neglect their quotation ....
..... & they'll send you WEEKLY reminders that their quote is still outstanding!! 
FWIW, I'd suggest you either stop talking to the Underwriter! ... 
... or get that 50-horse, which is still 5x the "sm. sailboat standard!"
(I'm very happy with the Suzuki 60, definitely would not want less, but maybe more!)