batmandj38
Cadet
- Joined
- May 6, 2013
- Messages
- 9
Hi,
Forgive me if this topic has been covered before. Last week I had my boat serviced for the summer season by a reputable marine mechanic here in the Bay Area. The service consisted of a compression check, which was good, replaced spark plugs using NGK BPR6EFS plugs, new cap and rotor, new spark plug wires, fuel filter check, which was fine, timing check, lower unit service including replacing the gear lube and water pump impeller, installing a new OEM propeller, installing an hour meter, and a trailer service and check. The boat is assumed to have no more than 50 to 100 hours on it as I am the second owner and it is in excellent condition.
I winterized it myself last October by filling the fuel tank, adding fuel stable, flushing my cooling system with anti freeze, and fogging my carb. Now the problem. So I took the boat out the day after my service, in freshwater (never salt) and 45 minutes in, my engine started to act like it was out of gas, then died. I looked physically at the tank, and it was half full. I phoned my mechanic and we did some trouble shooting. Final solution, put in neutral, wide open throttle for a minute, then pump and try starting it (flood the carb). It worked, it started up and ran fine.
My mechanic advised to go put fresh gas in, as he suspected fuel contamination or the alcohol separation from the gasoline. So after putting fresh premium gasoline in, everything seemed fine. Operating temp normal, oil pressure normal. We commenced to continue pulling and "Whipping" a tube. Heres the problem, only in hard right turns, Like steering wheel almost full right, and with wide open throttle, the rpm would dip way low for 1 to 2 seconds, as if i had pulled the throttle down to neutral then back to full wide open throttle. It did this almost every time we did a hard right turn. It did not do this in hard left turns with wide open throttle. Just right turns, like the fuel was being forced by the g force all the way to the left, and air was getting sucked into my line, yet, I have a full tank of gas. So, what is the problem? My boat was not behaving this way last summer under similar conditions.
My mechanic recommends I go out a few more times, with fresh gasoline each time and see if the problem persists. If it does, I will bring the boat back to him and let him figure it out. If the problem goes away, than my guess is that it was something in the fuel. Now I am not a mechanic, but I do most of my own auto work and minimal boat maintenance, i. e. oil change, lower unit lube change, battery, etc. He also thinks it could be the prop? The prop I put on is the exact model number and same diameter and pitch as the one I took off. Not aftermarket, so not sure why he would suspect that. Any suggestions? Truly appreciate any help, feedback. Thanks for reading...
Steven
Forgive me if this topic has been covered before. Last week I had my boat serviced for the summer season by a reputable marine mechanic here in the Bay Area. The service consisted of a compression check, which was good, replaced spark plugs using NGK BPR6EFS plugs, new cap and rotor, new spark plug wires, fuel filter check, which was fine, timing check, lower unit service including replacing the gear lube and water pump impeller, installing a new OEM propeller, installing an hour meter, and a trailer service and check. The boat is assumed to have no more than 50 to 100 hours on it as I am the second owner and it is in excellent condition.
I winterized it myself last October by filling the fuel tank, adding fuel stable, flushing my cooling system with anti freeze, and fogging my carb. Now the problem. So I took the boat out the day after my service, in freshwater (never salt) and 45 minutes in, my engine started to act like it was out of gas, then died. I looked physically at the tank, and it was half full. I phoned my mechanic and we did some trouble shooting. Final solution, put in neutral, wide open throttle for a minute, then pump and try starting it (flood the carb). It worked, it started up and ran fine.
My mechanic advised to go put fresh gas in, as he suspected fuel contamination or the alcohol separation from the gasoline. So after putting fresh premium gasoline in, everything seemed fine. Operating temp normal, oil pressure normal. We commenced to continue pulling and "Whipping" a tube. Heres the problem, only in hard right turns, Like steering wheel almost full right, and with wide open throttle, the rpm would dip way low for 1 to 2 seconds, as if i had pulled the throttle down to neutral then back to full wide open throttle. It did this almost every time we did a hard right turn. It did not do this in hard left turns with wide open throttle. Just right turns, like the fuel was being forced by the g force all the way to the left, and air was getting sucked into my line, yet, I have a full tank of gas. So, what is the problem? My boat was not behaving this way last summer under similar conditions.
My mechanic recommends I go out a few more times, with fresh gasoline each time and see if the problem persists. If it does, I will bring the boat back to him and let him figure it out. If the problem goes away, than my guess is that it was something in the fuel. Now I am not a mechanic, but I do most of my own auto work and minimal boat maintenance, i. e. oil change, lower unit lube change, battery, etc. He also thinks it could be the prop? The prop I put on is the exact model number and same diameter and pitch as the one I took off. Not aftermarket, so not sure why he would suspect that. Any suggestions? Truly appreciate any help, feedback. Thanks for reading...
Steven