|I have been running my boat since the middle of may with no issues. Fast forward today, I was towing my brother on the wakeboard, and about half way through the set (10 minutes into it) the motor started to sputter and come in and out of power. I pulled the throttle back to neutral and the RPM's were really low and the engine sounded like it was going to die out, and a few seconds later it just died. |
It woulnd't start up right away after, but if I gave it 5 min it started back up again and I could drive for about 30 seconds and it would die again.
Does it sound fuel related or electrical?
I also noticed my fuel and volt gauge went to 0 when all of this was happening and stayed there for about 10 seconds. I have been having an on/off issue with those gauges since the start where they go in and out at random, but I have been unable to diagnose the issue.
|I guess it would help to know what engine model do you have and if it's fuel injected or Carbureted.|
|Its a 1995 Mercruiser 5.7L Carbed.|
|I'm leaning more towards fuel, but it could be ignition as well with the few symptoms you described. Could be as simple as a plugged fuel filter.|
|It sounds like a fuel issue, but since the guages went out at the same time, I'd definitely not rule out electrical problem. I once had corrosion on the main circuit breaker on top engine (5.7l also) that gave me intermittent issues. Had to replace it.. It's the one that looks like a red button... 50amp if I remember correctly. Also had the coil give me problems (Look for oil leaking out of the coil). Other than that, I'd check/wiggle all the wiring connections that you can find. You never know... it may be as simple as that.|
|Chad, how can you check the main circuit break for issues?|
|I'd start with the fuel filter, like sparky suggested. When was current fuel filter put it? I'd put my $$ on the fuel filter. |
Gauges sound like a different issue. typically a loose ground behind the dash when several work intermittently or go out at the same time.
Circuit breaker may have corrosion/rust. You could pull the wires and wire brush them off, and reinstall.
If you have a water separator on your fuel line, i'd check that as well.
I just change the fuel/water seperator but can't find the fuel filter. I followed the lines from the fuel pump into the carb but its all through a hard line. Could the filter be in the carb?
|Some carbs have a small screen or filter in the inlet fitting. Many older boats have only the fuel/water seperator. Most newer boats have an inline filter between the tank and fuel pump.|
|I took the fuel inlet lines off of the carb and looked in, and didn't see any normal size fuel filters, all I saw was a small screen in the vertical position that was about a 1/4 of the size of the entire opening. I assume that is the only filter in there?|
|it's before the pump. follow the line back toward the tank. sometimes on the port stringer area.|
|I HAD THIS PROBLEM A FEW YEARS AGO. THERE ARE TWO FUEL FILTERS ONE MARINE ONE AND A REGULAR CAR ONE. REPLACED THE CAR ONE RAN FINE THE REST OF THE SUMMER.|
|could be the accelerator pump on your carb, if you throttle it and it falls on its face or is hard starting i wouldnt rule out needing the carb rebuilt, or having bad gas|
|I looked all over today and no inline fuel filter anywhere, from the tank to the fuel/water seperator. Im guessing there isn't one on mine.|
|Take a look at your cap and rotor also.|
|did the cap and rotor last week, as well as new plugs and new wires. |
Just replaced the coil today and it seems to start up better which is a good sign, but will have to test it more to make sure it doesn't die anymore.