As soon as the boat stalls, it starts up instantly, after idling a few minutes it will go good full speed just for a little while, then die again. The fuel pump has just been changed, I was wondering if there is a fuel filter or something simple I'm missing.
2007-05-15 10:45:34 · 9 answers · asked by cubfan29621 2 in Cars & Transportation ➔ Boats & Boating
Start with the easy/cheap....make sure that your gas tank vent is clear and allows a good airflow. You should have a fuel filter/water separator between the fuel pump and gas tank; replace the filters and drain any water. Next pull your fuel lines and ensure they are clear. If it still is acting up, I would suspect the fuel pump may not be generating enough suction or you may have a clog at the tank outlet to the fuel line.
Good Luck.
2007-05-15 11:16:32 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Sounds like water in the fuel system, let the boat stand for a good while e.g. over night then remove the float bowl plug on the carburetor to see if any water present in there, if so drain fuel system and tank if possible mop the fuel tank with coat-hanger and rag or sponge securely attached, make sure the water separator is also drained. Refill the tank and a little gas line anti-freeze (alcohol). Also some times the ignition coil can when hot, break- down the windings separate and when it cools a little they contract back together. Try those ideas out and happy cruising.
2007-05-15 23:44:05 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You should check for one other thing that has not been mentioned in the above responses: carbon buildup in the cylinders. If the engines have been run at slow or idle speeds often (as is the case with trolling), carbon can build up in the engine. What happens is that for a while, the engine will run fine. After the carbon heats up a condition called "preignition" occurs. This happens when the carbon is hot enough to ignite the fuel before it's supposed to. The result is similar to having really bad timing; no power. The situation your describing could be a result of this. If this is so, the fix is to fuel up your tanks with the highest octane fuel you can get and add an octane boost additive, if you can get it. then, take the boat on a real joy ride. Really wind it up and keep it's rpms up for an hour or so. You may find that the stumbling comes back during this process. If the engine does stumbles, put it in neutral and run the engines up a bit. You may find that the engines will rev fine while out of gear but will bog down when you put them back into forward. You may need to do this a few times. You'll know when you've cleared out the carbon because one of those times you'll slowly be bringing the engines back up while in gear and they won't bog down. After you've gone through this process, always run high quality fuel through your engines and if you do putter a lot, every once in a while take the boat out for a good hard run. If you can safely replace your thermostats with somewhat hotter ones, this can also help keep the problem down. Check with a Merc mechanic on the best rating.
2016-03-18 23:59:59 · answer #3 · answered by Anonymous · 1⤊ 1⤋
Mercruiser 4.3 Fuel Pump
2016-11-15 02:46:21 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Ok check this first. I had a problem like this and what it came down to was the connections on my fuel line. But since yours is an I/O it may be a little different. I only saw my problem at full throttle and it was an o-ring in the connection. But since yours doesnt have this style you should replace all the fuel lines and filter to remove this possibility. Also make sure your gas cap vents because if it doesnt, you will vacuum lock your fuel system.
2007-05-15 10:53:52 · answer #5 · answered by Christian 7 · 0⤊ 0⤋
These engines have all kinds of protective devices to prevent you from burning it up or blowing it. Check you temperature, oil pressure, RPM's and water pressure. You should get an alarm prior to any of these problems shutting the engine off. If it is a fuel problem, try hooking up a portable outboard engine fuel tank to the engine and running it. If your problem goes away, you know you have a fuel problem between the tank to the connection on the engine, possibly a bad hose, bad primer bulb, or a clogged pick-up tube in the tank. If you problem does not go away, your problem could be in the fuel system on the engine.
2007-05-16 19:22:12 · answer #6 · answered by coasty_14 2 · 0⤊ 0⤋
we had a small hole in fuel line. i found the hole when i put the boat on the ramp. it allowed the fuel to come out. it was a very small hole.
good luck
2007-05-15 12:47:41 · answer #7 · answered by craig 1 · 0⤊ 0⤋
next time it stalls...check to see if you have spark...a heating coil pack or distributor module will do that...it will run for like 30 minutes...real well and then just quit.....and if you wait awhile it will run again for awhile?
2007-05-15 17:06:48 · answer #8 · answered by texasflyer553 2 · 0⤊ 0⤋
The motor could be vapor locking
2007-05-17 11:27:36 · answer #9 · answered by J G 2 · 0⤊ 1⤋