Fuel Starvation?

[banki_21]

Hello all<br />I have a 91 evinrude v4 90hp, with compression @ 150 on all 4. The motor runs almost perect except for the fact it will not go past 4700 rpm's. I have decarbed it once and that really didn't do much for it but I have noticed when I push the choke in my engine comes to life like it should. I'm leaning towards a bad fuel line which I'm hoping to pick one up here this week or a clogged filter. The man previous to owning the boat said it had an inline fuel filter, i don't know exactly where that is I'm presuming in the fuel line somewhere?<br />Any insight or suggestions would be great

 

[JB]

Re: Fuel Starvation?

You have fuel starvation. Maybe on all cylinders but more likely on one or two.<br /><br />Continued running of the engine in this condition could cause serious damage. <br /><br />Instead of choking it to get the extra rpm, try squirting some premix into the carbs, one at a time. If it picks up on only one carb you have a gummed carb.<br /><br />A Service Manual and kits for the carbs would be a lot cheaper than taking it to a shop, and a lot quicker, too.<br /><br />Good luck.

 

[DJ]

Re: Fuel Starvation?

Make sure you are using a fuel line of at least 3/8" in diameter.<br /><br />Also make sure your fuel tank is properly vented.

 

[OBJ]

Re: Fuel Starvation?

6degree....I think I'd be leaning toward a carb overhaul if the suggestions in the previous posts don't do any good. Maybe a good idea to ask the previous owner when the carbs were last serviced.