Hello all,
I'm new to the forum. I can't solve this issue so I figured I'd reach out for some help. I'm restoring a century 8000 28 foot boat with two sterndrive 5.0 mercruiser v8 engines (gm 305). THis boat has been sitting unused for over a decade.
One of them was running good after the following work done to it:
-new starter
-new distributor cap
-new plugs
-new impeller
-oil change
-point cleaned off
-new gas (old gas syphoned out)
-carb kit installed and carb cleaned
I ran it on the hose water and it ran good. One issue I encountered with this engine in specific was that I needed to send a wire directly between the coil positive terminal to the battery to get it to fire up. Then it ran great. Then I took the wire off and it ran on it's own very nicely again. Then the next day I needed to run the wire between the battery and coil for it to fire up. Then it ran well on it's own WITHOUT the wire and seemed to for a few days.
I get the boat ready to bring to its first test on the water, as both engines were running good, and this engine started misfiring bad. It was idling super low and smoking bad. I hooked up the wire to the coil and battery to see if it would resolve itself again, but it did not. I am confused as to what could have possibly went bad between not running it for a day, moving the boat, and this being the result.
Since it started running poorly, I've changed the condensor and points in the distributor, I've put another fresh set of plugs in, and I'm using a new coil. Same symptoms appeared.
I am on my way to get new plug wires (they havent been changed yet) and an OEM coil to install. I cannot figure out where this issue may be coming from, and any help would be appreciated. Thank you.
I'm new to the forum. I can't solve this issue so I figured I'd reach out for some help. I'm restoring a century 8000 28 foot boat with two sterndrive 5.0 mercruiser v8 engines (gm 305). THis boat has been sitting unused for over a decade.
One of them was running good after the following work done to it:
-new starter
-new distributor cap
-new plugs
-new impeller
-oil change
-point cleaned off
-new gas (old gas syphoned out)
-carb kit installed and carb cleaned
I ran it on the hose water and it ran good. One issue I encountered with this engine in specific was that I needed to send a wire directly between the coil positive terminal to the battery to get it to fire up. Then it ran great. Then I took the wire off and it ran on it's own very nicely again. Then the next day I needed to run the wire between the battery and coil for it to fire up. Then it ran well on it's own WITHOUT the wire and seemed to for a few days.
I get the boat ready to bring to its first test on the water, as both engines were running good, and this engine started misfiring bad. It was idling super low and smoking bad. I hooked up the wire to the coil and battery to see if it would resolve itself again, but it did not. I am confused as to what could have possibly went bad between not running it for a day, moving the boat, and this being the result.
Since it started running poorly, I've changed the condensor and points in the distributor, I've put another fresh set of plugs in, and I'm using a new coil. Same symptoms appeared.
I am on my way to get new plug wires (they havent been changed yet) and an OEM coil to install. I cannot figure out where this issue may be coming from, and any help would be appreciated. Thank you.
