1995 merc tracker 115 hesitates?

[mihssen]

Hi<br /><br />Please forgive my outboard "newness", but i have a prob i need some advice on. I just bought a 1995 nitro with a 115hp merc tracker. I had to take it in for a few other problems, and told the shop that it hesitates slightly and "grumbles" some at around 4000rpm. They didnt feel a thing, but it does it all the time, so i dont know how they missed it. Both my friend and I can hear and feel it. It occurs for about 3 seconds or so about every 15 seconds. The boat does idle poorly once warm as well. I can still get to 52mph, and the hesitation is gone there, but i hate to run top end all the time. I have run a can of sea-foam and new plugs at the marinas recommendation. Any thoughts would be greatly appreciated.<br /><br />Thanks<br />mark

 

[Wellcraft 89]

Re: 1995 merc tracker 115 hesitates?

To get dealers to find things,you take them for a ride even if you have to take days off to do it.<br />Things I'd be looking at are<br />Fuel venting <br />compression <br />plugs (how they look, are they all consistent in color or wet,oily gray)<br />fuel is it new old.<br />Carbs clean or gummy/tarnished <br />Fuel pump diaphram<br />just a few <br /><br />Rich