i always wonder if the poeple who love to sya bayliners are junk have actually worked on them....
i have. i worked as a service tech at a one the big chain bayliner dealerships for 2 years. our shop wasnt 100 yards from a launch ramp.
all boats have an occasional flaw.
sanger, one the best quality ski boats tend to come with crap in the tank, within 20 hours you get hesitation problems, replace the inline filter. for a while a batch came through that the prop shaft coupler had been overtightened, that resulted in a few bolts snapping and total loss of power to the prop. i figure that was a new guy who had not been properly trained yet, only about a dozen came through and they came out the line one after another by the hull numbers.
supreme ski boats, the people who fix them dont call them SUCKpreme for nothing.
i worked on a reinells too, on one i did pre delivery inspection myself, it did not include an actual use in the water with a load on the motor. it didnt make it past the docks once it had a load on the motor before the motor blew (volvo / gm 4.3).
one of supremes did the same thing once with its merc / gm 5.7, motor blown in under 2 hours.
problems do slip through. wires do get misconnected, bolts do get over or under tightened. thats what a good warranty is for, and merc has one of the best.
bayliners are great boats, at an entry level price. i havent seen anything with them that i havent seen with the "better" brands. they are not outstanding, but i would buy one of them, and there are brands i have worked on i would not ever consider owning.
and i speak from experience working on them.
now as for your problem, it is most likely the interrupter switch causing it to stall. its possible it has come out of adjustment. but i suspect there is more going on.
namely, why is hard to to shift into forward?
is it still hard to shift into forward if the motor isnt even on?
if something is interfering with the shifting, that could cause the interrupter to be interupting for too long.
shift cables do fail. either quickly are after many years of use.
take it the shop, its under warranty.
and again, 18 hours is just about time for your 1st service. fluids and filters.
its been my experience that 95% of marine issues stem from lack of maintence. 5% are things like this, warranty.
one good day on the water and you have hit 20 hours already. while an hour or two excess isnt bad, might as well get it knocked out while it is in the shop anyways.