i have a 25th anniv. hdr 40 efi. has roughly 28 hrs. recently it has started cutting out at wot. only does it about 3-5 times an outing and only 4 a few seconds. motor doesn’t totally die just cuts out and then revs right back up. initially i thought fuel issue but i noticed that when it happens i get a service engine light flash and the tach flips from rpms back 2 hrs making me think its losing spark. just wondering if anybody has any ideas i can check quick before i have to haul it to the dealer (of course im sure it wont do it 4 the mechanic)