Force outboard 85 hp

[Tinak]

Hi, I have an 88 Bayliner Capri, The problem is after about 40 minutes of running the motor slows down and dies. We can start it up again and it will only go about 5 miles per hr. If we try to speed it up again it will die. This lasts about 15 minutes, then we can go back up to normal speed for another 40 mins or so. Just had the spark plugs, water pump changed. I tried to squeeze some gas out to check the sediment in the gas, only a tiny bit of gas came out (there is a little) I was thinking maybe a fuel line/ filter may be plugged. Took off the filter, looks to be charcoal filled. I called a few repair shops and one gentleman was confident in saying the Vent is plugged. He said there is 3 lines to the motor and one may be kinked or plugged. The problem is I dont have any idea where it is or what to look for. He said my husband could check but we really dont know a whole lot about outboard motors! The crappy thing is we thought it was the water pump and paid alot for that and the plugs to be replaced!!!

 

[12Footer]

Re: Force outboard 85 hp

Welcome to iboats.com, Tina. you had the fuel pump rebuilt? If the gas is older than 6 months, I would drain the tanks,and clean them. The bowls on the carbs are great little collectors of condesation that gets into the tank and fuel line. Check tank vent ,which is the tiny screw-like thing that you open on the gas cap of most portable tanks (assuming your tanks are the 6 gallon portable type). Make sure it is open while the motor is running on that tank.If it is, loosen the whole gas cap,and see if performance comes-back.Usually, a clogged or closed vent will make the primer bulb on the fuel line colapse like an airless balloon.<br />You said the filter had charcoal in it?<br />Must be a fuel seperator or something. There is a one-screw cap on the fuel pump that has the fuel line from the tank hooked to it. There is a particulate filter under this cap (I call it a hash pipe screen). make sure it is clean, and that none of the mounting screws on the fuel pump have loosened-up after they rebuilt it..<br />Just a few preliminary things to check.<br />But do a search here. using the search feature, because there;s a gob of info on this previously posted.

 

[Tinak]

Re: Force outboard 85 hp

Thank you very much for the reply and suggestions. They will come in handy however, the fuel tank is not a portable one. It is inside the boat under the motor. Does this change some of your suggestions? I have a large cap that unscrews and we add of course the oil and gas..<br />would you say that a 50 % ratio is the correct mixture? <br />Im not sure how to drain this type of gas tank since it is not portable.<br /><br />Thank you! TinaK

 

[roscoe]

Re: Force outboard 85 hp

You will probably have to siphon the gas out of the built in tank. There should be an access hole where you can get at the top of the tank. You can remove the sending unit which operates the gas guage.<br /><br />There is a fuel pick up hose with a screen type "sock" on the end of it. This lies in the bottom of the tank. There may be enough crud in the tank that it is plugging up the hose.

 

[Tinak]

Re: Force outboard 85 hp

Thank you, Ill do that. Sure hope it works. It sure is nice when you can go fishing and cruising around with out fear of breaking down!<br />TinaK

 

[dorelse]

Re: Force outboard 85 hp

I hope you meant is: 50 to 1 the correct ratio? not:<br /><br />

would you say that a 50 % ratio is the correct mixture?

50% would be a 1 to 1 or 2 to 1 ratio depending on what you meant by it....just checking to make sure.

 

[Tinak]

Re: Force outboard 85 hp

No I guess what I meant was that on the back of the Quicksilver oil We follow the recomended amt, one ratio is like 25 or 50 to 1 so if we used the 50, for 10 gallons of gas I think it was 26 ounces of quicksilver. I wanted to make sure that sounded about right. <br />The primor bulb on the fuel line is soft (very squishy) Should that be hard? <br />Where would the vent be located on the motor? The gas tank is in the boat under where the motor sits. (not portable)<br />Thanks again!<br />TinaK

 

[roscoe]

Re: Force outboard 85 hp

You should be able to squeeze the bulb a few times and pump it up. It should get firm, but not hard.<br /><br />With the built in tank, there should be 3 hoses on the tank. One is the fill hose. THe second goes to the bulb and then the engine. The third runs up to a point high on the transom and usually has a small plastic cap with holes in it. THis is your vent. It allows gas fumes and pressure to escape as the outside temp can cause expansion. It also allows air into the tank, to replace the gas being used by the engine.<br /><br />I would replace the entire fuel filter too, they are very cheap, $4.