OK got the carb all rebuilt. Put it back on, turned the engine over w/ the key for 5 seconds to get fuel going...stopped, manually pumped carb throttle until a few squirts came out, then hit the starter again. Fired up, only 150rpm low.
Tweaked master idle to get up to 700 rpm, and left it run for about 3 minutes until choke opened fully. Oh yeah--I never put the boat in gear; just in neutral.
I usually hop off the boat to ensure that my water hookup is still in place for cooling. Noticed a light black sheen on top of the water in the driveway. It does not look blue/green like drive fluid, and it does not look like unburned engine oil. It's never done that before I rebuilt the carb.
So I shut her down, ensured that it wasn't drive fluid (it doesn't appear to be), and checked all fluid levels. Engine oil and drive fluid looks OK.
So what are the possibilities? Am I possibly burning so rich before tuning the carb that the exhaust is looking like a small oil slick? Possibly burning oil? Blew a piston ring out upon first turnover after rebuilding carb?
Ideas are welcomed. I'm tempted to tweak the idle mix screws and main idle setting until they are as specified per tuning steps, then see if the sheen is still on the water...but this is concerning me...
One other thing; my float was mis-adjusted per the Holley rebuild kit instructions. I inverted the float bowl, with the center-hung float, and found it almost at the bottom of it's travel. So I put in the brand new adjusting screw, and set it to the center of the bowl while inverted, exactly per instructions.
Thanks Much!
Tweaked master idle to get up to 700 rpm, and left it run for about 3 minutes until choke opened fully. Oh yeah--I never put the boat in gear; just in neutral.
I usually hop off the boat to ensure that my water hookup is still in place for cooling. Noticed a light black sheen on top of the water in the driveway. It does not look blue/green like drive fluid, and it does not look like unburned engine oil. It's never done that before I rebuilt the carb.
So I shut her down, ensured that it wasn't drive fluid (it doesn't appear to be), and checked all fluid levels. Engine oil and drive fluid looks OK.
So what are the possibilities? Am I possibly burning so rich before tuning the carb that the exhaust is looking like a small oil slick? Possibly burning oil? Blew a piston ring out upon first turnover after rebuilding carb?
Ideas are welcomed. I'm tempted to tweak the idle mix screws and main idle setting until they are as specified per tuning steps, then see if the sheen is still on the water...but this is concerning me...
One other thing; my float was mis-adjusted per the Holley rebuild kit instructions. I inverted the float bowl, with the center-hung float, and found it almost at the bottom of it's travel. So I put in the brand new adjusting screw, and set it to the center of the bowl while inverted, exactly per instructions.
Thanks Much!