95 Force 70hp -- Intermittent loss of power

[fisherfrk]

Thankfully it has been a long time since I have had to ask any questions, but now I am up against it. The first time I took my 70 Force out this year it ran like a dream. A week later, I took it back out and as soon as I opened it up, it fell on it's face. I changed plugs but that did not help. It would idle OK, but would do nothing under load. I put a new fuel filter, though the old one looked OK, no difference. I got it home, put muffs on it and thought I found that my tank was not venting. After I took care of that, it seemed to run on the muffs great.<br /><br />I took it out a day later and it ran like a dream.<br /><br />This evening it started better than it ever has, but, once again, as soon as I opened up, it died, seemed like fuel, but the bulb did not collapse and the tank was well vented. <br /><br /> What next? Any help would be GREAT!<br /><br />Doug

 

[steelespike]

Re: 95 Force 70hp -- Intermittent loss of power

Sounds like a fuel problem try hitting the choke <br />whan it happens if it helps its a fuel problem.

 

[fisherfrk]

Re: 95 Force 70hp -- Intermittent loss of power

Thanks, I will try that, if it makes a difference is it carborator or fuel pump?

 

[moose211]

Re: 95 Force 70hp -- Intermittent loss of power

i have the same motor i would say the fuel pump but i have the same problem last yr. and it was a reeve vaule that was cracked

 

[fisherfrk]

Re: 95 Force 70hp -- Intermittent loss of power

Ok, I took it back out tonight. It started hard, I changed tanks and it started immediately. I went through a no-wake zone with no problems. I went a mile up the river WOT and it ran really well. I then switched tanks to see if the tank was the problem. Immediately it refused to run when a load was placed on it. I switched back but could not even start it for long while. When it did start, it died under load. I did find that when the idle would begin to quit, I could choke it and it would help.<br /><br />I am thinking that maybe it is a pinhole in the fuel pump diaphram. The filter screen in the first tank was pristine clean, so there seems to be no filth in the tank.<br /><br />I am really confused now. Any help would be welcome. <br /><br />Doug

 

[steelespike]

Re: 95 Force 70hp -- Intermittent loss of power

It is a fuel problem. If the bulb stays up could be fuel pump or carb(s) Could even be sucking air between tank and motor (bad hose or damaged<br />connector or fittings.Unhook line between pump <br />and carb Carefully crank and observe fuel flow from pump,should be nice strong pulses.<br />Have you checked the various filters if any?

 

[fisherfrk]

Re: 95 Force 70hp -- Intermittent loss of power

Thanks for all the help! I replaced the fuel line between the filter and carb with a clear line and discovered a lot of bubbles. The air was coming in at the union where the gas line joins the engine. All it took was clipping the line and reattaching the union!<br /><br />Thanks again for all the help!