Thanks all, yes thats what I was afraid of in regards to how simple it is to service a newer motor vs. diagnosing an issue in an old one.
I have had the boat for appx 9 months. Has always run rough, the biggest problem is it has a tendency to stall when putting into gear. Even after what seems like an incident free morning, when I tried to fire up the engine in the afternoon, motor sounded fuel starved and bulb needed to be pumped to get home. Previous mechanic wound the idle speed up, which did help a little, but I really want the problem eliminated.
One thing that may help diagnosing is that on ear muffs it idles at 2000, in water drops to about 1000. This seems like a big drop, so not sure if that is diagnostic
Work done so far:
-new plugs, Champion as per spec
-new separator
-new hoses from tank to engine
-new primer bulb
-pumped existing fuel in tank and polished with inline filters
-VRO has long been disconnected. New fuel only pump installed by me
-decarb with Seafoam
-all cylinders within 12% of each other
I haven't fully tested after the decarb, but keen to hear any other thoughts...
Cheers!