engine bogging down no power

Just got the New carb from Holley yesteraday.I plan on putting it on tonight.Will let you guys know what happens.Just for your information,Holley sent me a notice in which you can go on the interent at www.holleytv.com.It gives you a video guide on how to tune your carb.It shows you everything you need to know.When you get to the site just click on "carb tuning" and it has multiple videos on what you need to know when tuning your carb.

My issue is like a stumble when you try to accelerate quickly. It's mostly off idle, but I've noticed it can happen when quickly accelerating from one speed to a higher speed, even from 1500 rpms or so.

Full throttle is fine, and if you accelerate easy, it's fine. If you punch it though, such as to get a big slalom skier out of the water, it will hesitate, if it's not totally warmed up, it can hesitate pretty badly.

Also, idles and starts up hot and cold fine.

Thanks Peter,

I've checked for a squirt, and I do get one. But it could be that it's coming in late. I haven't gotten a chance to adjust it or look at that aspect of it carefully.

Aside from adjusting the little spring thing that hits the pump lever, which is still a possibility, are there are other adjustments that can be made? Any other aspect of the carb that could be at fault? Would a faulty power valve do this?

I do have new plugs, wires, cap and rotor (mine is not a points type, it's a prestolite with the electronic ignition). Also, a new fuel filter, the inline type mine doesn't have a water separator.

Doing the above tune up did improve the overall performance a little. The boat got a little more power and a slightly faster top end. It seemed to make the stumble a little less, but didn't make it go away.

The timing is a little suspect. It's advanced to 13 degrees, but bringing it back to the recommended 10 seemed to worsen matters.

Actually, correction, bringing the timing back to 10 degrees worsened matters before I replaced the spark plugs and everything. And, I had a wacky assortment of different plugs in there previously, as mentioned here: Different Plugs Post

Do you think that now that I have the right plugs, bringing the timing down to 10 degrees might improve things?

As far as doing the carb myself I knew a guy who did it for me. I brought him carb and kit for $70 he rebuilt, glass beaded the inside and painted for a true professional job. So kit and labor I was into it for 120 compared to 500 brand new. I did fuel pump to just to take care of almost all fuel delivery. I would pay to have it done rite all day if you dont know what your doing. Check your fuel water/separater if havent done yet.