stuck on trailer

 

are you sure it is not varnish in the intake? did it sit for a while ? those intakes have very small jets and can be cloged very very easley and not run. if not there is a company that will flush out your entire fuel tank get it perferctly clean, but there not cheap but i would say its worth it. they adsd a chemical and hook there machine to the tanks and filter the gas about ten times and its realy clean.

 

water seperater filter..... u can empty it as it fills with water, as water is heavier than gas. the petcock is on the bottom.

 

I got caught again with my 80 4 stroke Yamaha & Pontoon boat. Filled up couple of weeks ago at a local marina, gas was real slow comming out of the hose. Should have known better and shut down but I went ahead. After filling running rough hard starting, had to have the carbs torn down cleaned and adjusted. 100 running hours ago last summer same thing. That's nearly a thousand dollars of repairs in 200 hours running. 5 bucks an hour. I blame it 100 percent on poor fuel from the marina.

My other Yamaha 50 4 stroke on a 17 foot alamimuim boat with the same hours and age as the 80 has never had as much as a hickup. Welded alumimum tank and allways fills from gas stations while on the trailer.

Boats

 

I blame it 100 percent on poor fuel from the marina.

i seckond that, even the gas station sometimes give bad fuel.tisk tisk

 

Chances are that the water got past the engine filter and into the VST tank. The engine filter under the cowling has a red ring in it that rises with the water in it. If it is not sitting on the bottom, you have water in it. If you look on the port side of the black plastic intake tubes, you will see the VST tank. There is a black rubber plug at the top of the tank. It's about 3/8th of an inch. It's just push in and can be removed with a pair of needle nose pliers. Behind it is a schrader valve. It's like a tire valve that you can push in to relieve the pressure in the tank. At the bottom of the tank is a brass plug. You can remove it with the pressure relieved to drain the tank. Make sure the battery is disconnected when you do it. Aside from that you can use some E-Zorb water remover in your tank. It's especially made for ethanol. One other thing that has worked for me is to put about 4-5 ounces of Starbrite Startron in the water separator and idle the engine for about 10 minutes and then run it hardd to blow out and clean the fuel system and injectors. Good luck.

 

Bottom S thats good advice I will have a good look under the cowling to see if I can figure out what exactly you are saying.

The final fix for the 80 was just as you say, Starbrite then 5500 rpm out in the bay until the tank was near empty, then a fresh fill of gas. ran it last night and it runs like a sewing machine. I think one problem with that engine it's inside Lynnhaven no wake zones all the time and runs 2000 rpm about only while the 50 on my fishing boat is either 4500 or stop.

Boats

 

Bottom S thats good advice I will have a good look under the cowling to see if I can figure out what exactly you are saying.

The final fix for the 80 was just as you say, Starbrite then 5500 rpm out in the bay until the tank was near empty, then a fresh fill of gas. ran it last night and it runs like a sewing machine. I think one problem with that engine it's inside Lynnhaven no wake zones all the time and runs 2000 rpm about only while the 50 on my fishing boat is either 4500 or stop.

Boats

Boats,
On your boat, that engine is carbureted and doesn't have a Vapor Separation Tank. You might try taking off the drain plug at the bottom of the carb bowl and flushing it out.

The F225 has the tank and a high pressure fuel pump in it. One thing that can cause problems like surging is a small screen at the bottom of the high pressure pump. It's he size of your pinky nail. It can be cleaned but the tank gasket cannot be reused. Once gas hits it, it distorts. Hope this helps