I brought this up last year, and concerned about it again.
Mercruiser 3.0L Alpha one (130HP?). Does anyone
know if this engine has hydralic valve lifters, or adjustable?
I'm assuming that they are adjustable. Anyways, 3 questions:

1) Adjustment procedure, is it 1/2 turn, 3/4, or 1 turn
past zero lash ? Whats Mercruiser say, whats common.

2) How do you get the valve cover off with that bracket
on top? There is a big plate steel bracket on the left
that has a wing that bends in to hold throttle cable.

3) What the best way to turn the crankshaft for the
valve adjustment? Take plugs out, and just grab
the belt and man-handle it around like that ?

I'm concerned about this clacking noise that I've been
hearing since last year, ahortly after I bought it new.

Also, been hearing a "huffing" noise near the carb and
manifolds - sounds like one cylinder is "huffing" through
the carb or something. Hard to tell if its one "huff" for
each cylinder at idle, or just one cylinder out of four.
The boat runs fine. Idles well, accelerates, high speed...
There is nothing wrong with the way it runs, just wondering
about these noises (at idle) - this valve noise, and this
"huffing" type noise near the carb.


Thanks!