Originally Posted by uncle al
was the obm tilted up?
was it tucked under?
does it sneeze when accelerating?
does it reach its full WOT?
If it doesn't get to WOT, does it run better if you squeeze the primer bulb?If it does that could also be the fuel pump diaphragms are stretched.
Is it over oiling from the oil pump?
Have you got the correct NGK spark plugs fitted?
have you tried to start with the throttle wide open, not on the gear lever but on the fast idle leaver?
remove strip and clean carburetors check float heights and needle valve seats for wear, when reassembled set all three idle air screws at one and a half turns out from lightly seated. ignore any w/shop manuals on mixture settings.When you have refitted your carbs, when setting them up have the OBM straight up and down because the design of the carbs will make it run very rich on tickover.when every thing is set up, you should have about a two hundred RPM difference between tickover in neutral and FWD gear. If the engine sneezes on acceleration richen the mixture by the width of the screw slot on the idle air mixture screw.
Thanks for the response.
The engine would have been tilted slightly up.
No sneezing on acceleration.
Yes gets to wot 5100RPM with 21" prop.
Oil consumption doesn't seem excessive and not too smokey.
Yes they are the right plugs but I will probably replace them.
Yes I managed to start it the following day by using max fast idle. Think I tried that while afloat with no luck.
I will follow your settings for the carbs after cleaning at the weekend.
Also my first post made it sound like it cut out on its own in the bay. No that was me checking and finding that it re started several times and thinking were good to keep fishing.