05 columbia series 60 weak on takeoff--confused...

Ok boys, this is what i got--

04 series 60 engine, 10 spd, 3.73
845K
Decent once moving --gears 3-8 good boost (my opinion--not fm a guage) weak in 9th and 10th in
terms of pwr.

So 2 issues --

1. She has gotten noticeably worse at takeoff--w 40k in the can, in 2nd gear she sounds like she will stall (on flat grnd) if i dont give her a litl throttle and feather clutch. Whats up???

2. She unfortunately has no pwr in 9th or 10th gears on hills; 8th np

Your comments are appreciated.

Thx. T

 

Filters changed every oil chg 15K--fuel looks almost new.

U know what i have noticed is that if i sit at a ramped loading dock too long shes really hard to start--which i believe is a fuel prob.

So does that mean air leak in fuel sys somewhere or ck valve etc...

Any way to best tackle this issue???

 

Ty. Any ideas on ck procedure?

 

HG?

 

Ty sir