Hole shot to plain very very slow

[mrstevewayne]

Can anyone give me an idea on where to look as to why I am having such a long time to plain my boat off?
1988 model Stratus Nashville 279V Bass Boat.
Boat: Stratus 279V
Engine: Johnson 150 HP (newly tuned)
Prop: stainless 4 Blade
It just seams like it is taking a long time to get up on plane.
Motor sounds good and healthy
only using about 10 gal of gas, and both live wells are empty of water.
Any place I should check first?
Thank You
All advise is welcomed.

 

[jimmbo]

What are the RPMS at WOT, properly Trimmed?

What are the Compression Numbers?
Is it firing on all Cylinders?
Can the Spark jump a 7/16" to 1/2" Gap?
Are all the Carbs clean?
Are all the Throttle Plates opening Fully?
Is the Spark Timing set correctly, and fully advancing?

What Pitch is the Prop, and what model of Prop?

And how long have you owned this Motor?

 

[mrstevewayne]

I have only had this boat for 1 week, and only put it in the water once. I will get all this info I can you mentioned into this post and give you the numbers for advice.
Thank you very much

 

[Texasmark]

I found this for reference: https://www.smartmarineguide.com/L51899307

That rig ought to catapult out of the water in the hole shot and run 55-60 range at WOThrottle. If the above suggestions don't yield answers, you might weigh the boat as the foam flotation may be saturated if it sat out in the weather over the years. How many #s that would add I have no idea and a passenger or not could equalize that hindrance.

Additionally, the RPM and MPH numbers can help to show if the prop is the one that was used on the rig over the years vs something a dealer stuck on for the sale. It would help to know if the prop has port holes under the leading edge of the blades or not. Ports in the hole shot reduce the resistance to the engine developing its RPMs via reducing the density of the water across the blades. They are especially useful in Bass Boat performance given the way BB hulls are built and the boat is loaded.

Last, how you execute the shot is important and is a trial and error effort until you figure out what works best......so work the above Q-A test above and then we can talk about shot execution.

Last, operator capabilities are certainly a factor.

 

[Faztbullet]

Motor if mounted on hull should be in the 3rd hole...vented 24 pitch prop if Raker or 25 if a Turbo(best) and if its lazy out of hole and doggy on top end ..tighten the high speed jets as they do come loose and cause these issues.