Engine Sluggish - Any Solutions??

ryanj013

I have a 2000 Rinker 310 Fiesta Vee with twin 5.0's. I have recently had about $20k worth of work done on it including new drives, new carb, bottom paint, gauges, batteries, etc.. However, I am having a constant issue where if I throttle up to about 1/3 and stay there for about 5 minutes and then try to power up past that I get absolutely NOTHING. No added power even going to full throttle. 

I have to bring both throttles down to Neutral and then repower back up. If I do that I get full power. I can easily get up to 35+mph but it needs to be right when I launch or after bringing it back to neutral.

Does anyone have any ideas what that could be? 

howardrams

Throttle cables hanging up?  Doesn't sound like fuel or ignition.

Dream_Inn

Throttle cables would be my first guess as well.  If they have never been changed, you are well over due.  I used to own a 2002 310.  Throttle cables was the last thing I changed out right before I sold it in 2012.  My wife said she could finally drive it (throttle was much easier to move) & then we sell it.

raybo3

I would have thought that if it were the cables hanging up then the shifter would be hard to move. Maybe a linkage problem at the carb?????........... 

ryanj013

Wow great thought on the throttle cables! Is there a way to test that or is that just something that a mechanic needs to look at and repair/replace?

aero3113

You can have some one move the throttle while you look at the linkage and carb. Maybe you can see when it hangs up. Also you can spray the linkage with carb cleaner to see if that helps.

zaverin1

Well let's look at the basics 
yes if you have two people put control in throttle only mode, remove the top covers and fire Arrestors.
when moving the throttles do your butterfly's open all the way? If not try the neutral back to full throttle and see if they do? That would leave me to believe your cables are stretched.
if they do open all the way it could be your accelerator pumps not working properly or carbs being out of adjustment.

ryanj013

Thank you all so much for your help. I had my local marina mechanic make some necessary tweaks to things and it runs like a champ now!