As long as needles are set about 1 1/4 to 1 1/2 turns out from gently closed
motor should start and run...fine tune needle settings on boat warmed up.
Tags on motor identify the parts used to build power head and are needed
when ordering replacement parts. Makers of engines configure a basic power
unit to customer's application...I once had two Briggs and Stratton motors
to repair for a neighbor...involved some parts swapping and some new parts
...crank shaft on one motor had an extended snout to adapt to brush grinder
while the other had a stiffer snout adapted to dual belt pulley. I think some
other changes as well. Parts clerk needed the data plate numbers (model and
serial) to order the correct parts. Sometimes numbers stamped into sheet metal
and sometimes on tag fastened to motor. In the event parts are needed the parts
clerk can find parts with the numbers...without the numbers and/or letters
finding right parts may be difficult.
All this assumes maker still supports the product with parts availability...
sometimes even fairly new items are treated as throw away as it is assumed
customer will not pay for shop time to replace a dollar part on say a
2 year old weed whacker that can be bought new for not much more than
cost to repair the old.
If you have an older vehicle and are involved in a minor collision that sets
off the air bag your insurance company may total it rather than pay for
repairs and a new air bag...an unpleasant way to learn that repairs can
often exceed value of a middle age vehicle...average age of vehicles on
road is about 9 years.