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Hey Team,
First time boat owner (1993 SNCB purchased in December 2020) still trying to figure out the basics of boating and a carburetor. Hopefully someone has had a similar issue or could shed some light on what may be the problem.
The same scenario happens each time after filling up with gas. Fill the gas tank up to full, run the blower for 5 minutes, and then the engine won’t start (with throttle in neutral and turning the key). The engine cranks but will not start. After putting the throttle 1/3 WOT in reverse and moving further into reverse (until WOT and it can’t move any further), the engine will eventually start but unevenly rumbles and is barely hanging on to remain on. Let the boat idle for 5-10 minutes and the engine continues to slowly and unevenly rumble until it starts smoothing out. Then drove it at WOT (assuming it was a flooded carburetor and needed to burn off the excess fuel) and very slowly the engine increases rpm from 2000ish to full capacity over 1-2 minutes (moves up each 200 rpm over 10-15 seconds). Brought the throttle back to idle and the engine seems like it wants to die.
Prior to refueling, I ran the manual bilge pump and a small amount of clear lake water was emptied until the bilge was dry. After refueling and having the starting problem, I ran the pump again and had a significant (probably 2 or more gallons) of junky looking fluid emptied that looked and smelled like fuel. Looked at the water surrounding the boat and it appeared to be gas and/or oil in the water. Immediately stopped the boat and had it towed to the slip for concern of gas in the bilge.
Not sure what is happening here. Cold start is fine and warm start in the middle of the lake (i.e. after ski runs, etc.) the boat fires up no problem with turn of the key and no throttle input (throttle in neutral). The only issue with starting the boat is after refueling. In addition, the potential gas/oil leak into the bilge is concerning. Unsure if the starting after refueling issue and potential gas/oil in the bilge are two separate issue or related. The starting after refueling issue potentially seems like a severely flooded carburetor, but not sure why it would only occur after refueling and no other time when starting the engine.
Had the boat serviced when we first purchased it. The mechanic said he felt the carburetor was not 100% but in fine condition and didn’t need a rebuild at this time. He had no problem starting the engine but I figured it’s because they did cold/warm starts and did not recreate the problem of starting after refueling.
Thanks in advance for the help.
Ryan
First time boat owner (1993 SNCB purchased in December 2020) still trying to figure out the basics of boating and a carburetor. Hopefully someone has had a similar issue or could shed some light on what may be the problem.
The same scenario happens each time after filling up with gas. Fill the gas tank up to full, run the blower for 5 minutes, and then the engine won’t start (with throttle in neutral and turning the key). The engine cranks but will not start. After putting the throttle 1/3 WOT in reverse and moving further into reverse (until WOT and it can’t move any further), the engine will eventually start but unevenly rumbles and is barely hanging on to remain on. Let the boat idle for 5-10 minutes and the engine continues to slowly and unevenly rumble until it starts smoothing out. Then drove it at WOT (assuming it was a flooded carburetor and needed to burn off the excess fuel) and very slowly the engine increases rpm from 2000ish to full capacity over 1-2 minutes (moves up each 200 rpm over 10-15 seconds). Brought the throttle back to idle and the engine seems like it wants to die.
Prior to refueling, I ran the manual bilge pump and a small amount of clear lake water was emptied until the bilge was dry. After refueling and having the starting problem, I ran the pump again and had a significant (probably 2 or more gallons) of junky looking fluid emptied that looked and smelled like fuel. Looked at the water surrounding the boat and it appeared to be gas and/or oil in the water. Immediately stopped the boat and had it towed to the slip for concern of gas in the bilge.
Not sure what is happening here. Cold start is fine and warm start in the middle of the lake (i.e. after ski runs, etc.) the boat fires up no problem with turn of the key and no throttle input (throttle in neutral). The only issue with starting the boat is after refueling. In addition, the potential gas/oil leak into the bilge is concerning. Unsure if the starting after refueling issue and potential gas/oil in the bilge are two separate issue or related. The starting after refueling issue potentially seems like a severely flooded carburetor, but not sure why it would only occur after refueling and no other time when starting the engine.
Had the boat serviced when we first purchased it. The mechanic said he felt the carburetor was not 100% but in fine condition and didn’t need a rebuild at this time. He had no problem starting the engine but I figured it’s because they did cold/warm starts and did not recreate the problem of starting after refueling.
Thanks in advance for the help.
Ryan
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