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The good The bad and not so good

R

Rob B

Moderator
Staff member
As you know I finally finished the resto in another thread, so I was excited to head to the river today for a test run and much sure everything works. The good; the boat floats all gauges work and the stereo cranks. The bad; I can't get over 60 mph (gps) without the boat porpoising so bad that I can't go any faster. The only thing different before the resto was the trim tabs and I had a splashwell. The not so good is the motor shut down twice while underway, the only thing I can think of is trash in the fuel lines. The reason I say this is the motor would crank back up. So tomorrow I'll pull the filters off and clean them.

So my question to you guys is do the trim tabs make that much of a difference? Oh before the boat would reach 65 mph easily. My setup is as follows:
250 HP Evinrude
24" setback
cl of prop 3" below vee
24P raker

Here's some pictures from today:
DSCN0414.jpg

DSCN0397.jpg

DSCN0402.jpg

DSCN0408.jpg

DSCN0407.jpg
 
Robbie, the boat looks awesome....congradulations!

(I'm sure you'll get the porpising figured out.)
 
The boat looks great, it will just take a little time to get all of the bugs worked out. Keep us posted!:thumb:
 
Nice boat. On the trim tab issue on my 2400 if the tabs were touching the water on a top end run in smooth water than the boat would porpoise. The porpoising was caused by the tabs forcing the bow down and the motor trim is trying to raise it up. Get someone to look over the transom at a fast pace and see if they are dragging. Hope this helps.
 
Absolutely beautiful!

Porpoising is caused by balance and prop. Are you using a different prop right now? IF you're using last years prop, then now you know why the previous owner added the trim tabs, because the huge setback caused amplified porpoising.

Hope the shut-down is filters. On my 2003 JohnnyRude, my shut-downs were caused by a bad ECU.
 
Boat looks great! I would set it up exactly as it was before... It worked then, it should now. Good luck, I'm sure you'll get the bugs out!!
 
Pulse,glad to hear the boat made her 2010 debut.She really looks good.As far as the porpoise issues,I'd try a dolefin.I know they look funky,but I,ve been real impressed with the results,ie planes much quicker,levels out at lower speed,and reduces porpoiseing and chine walking a high speed.I have them on all my boats.They cost about 50 bucks and mount up with in 10 minutes.The fuel-motor issue,try a pint of sea foam fuel additive.Its about 10 bucks at the parts store.I gained about 600 rpm and took out ethanol/trash related issues.Hope this helps.-------------JB
 
Hmmm.... I know that the setback is the same.. motor the same distance below the v? Same prop, right?
Did the motor shut down while turning some rpms, not at idle? No surging or anything, correct?

Boat looks good in the water.
 
Awesome looking boat!!!

That pic of her dockside is stunning! Great looking boat. Too bad about the shutdown....my Merc was doing that and it ended up being a bad harness.

I bet a 300XS would fix the porpoise. ;):poke:
 
Here's the answers to the above questions:
I had trim tabs before the resto, I didn't put them back on since that was where alot of the water had come thru and started the rot in the transom.

Same prop as last year, I haven't tried another yet.

While running 55 mph (GPS) all the water spray is behind me yet it felt like the boat didn't want to lift/ break free and ride, kinda of hard to explain. I guess get up on the pad and run, maybe that's why the PO added trim tabs.

My wife and I rode probably five miles up the river then back down, never missed a lick even thru all the no wake zones. We were in a canal not far from the landing when the motor just died, at the time we're cruising about 50 mph. What it felt like was not getting fuel and kinda of bogged down and died. She crank right back up, but I soon as I gave it gas died again. I then went to the back and pump the bulb it was soft not hard like full of gas. Once I pumped the bulb we were find the rest of the way. Maybe the bulb is bad, I've got a new gas line from the tank to the motor.

I've got 1.86 gears @5000 rpm's I was running about 57-60 mph(gps) my rev limter is 6250, but my sweet spot is 5900 rpms. I got the info on the motor from the guys over on S&F that runs Envinrudes. Hope this helps.

Thanks for the compliments guys!!!:thumb:
 
Where did you put the in-line filter, before or after the bulb?

Do you have the little "screen" in your fuel tank?

You have a lot of motor hanging way out there, porpoise will be a challenge.

What are you running for a prop?

Four blades!!! Trophy + or Bravo 1XS comes to mind for such a load.

I also run a Bob's Machine "Stabilizer Plate" (basically a sportier dol-fin see picture).

It will help with porpoise and allows you to run lower speeds on plane (at least on a 2100 it does).

And finally, was the 65mph before the resto on GPS?

Good luck and the boat looks great!!!:cheers::thumb::thumb::thumb:

HD
 
HD the in-line filter is between the gas tank and bulb, so it would be gas tank, in line filter, bulb, fuel filter, motor in that order. I'm not sure about the screen, I'll have to check. I think that's why the PO had trim tabs installed to help with the porpoising, I didn't have this problem before the resto. I'm running a 24P raker the older one. The 65 mph GPS was before the resto the only difference is the splashwell is removed and the trim tabs.
 
Sorry to hear about the motor. Hopefully, it's nothing major. I know our 135 Merc does something similar but ours dies when doing holeshot. We took it to a mechanic and he said it was a cracked fuel line feeding a carb or something like that. Anyways, he fixed it but it was doing it again last year. I'm sure you've already done this but I'd double check all the clamps of your fuel lines from tank to motor.

Your boat looks really sharp in the water! :cheers: Glad you were able to run it.
 
So for sure then, that's why he added the trim tabs since everything else is the same. Isn't the Raker a small diameter prop like the Laser II? I'm not familiar with the JohnyRude props, what's the diameter of the Raker?

Reason I ask is the Laser II is made for smaller horsepower/shorter boats and has a smaller diameter, somewhere in the 13 3/4" range (depends on pitch). The Tempest Plus came out for the longer/heavier bass boats. Made to run higher, has larger diameter and bigger blades, somewhere in the 14 1/2" range (depending on pitch once again).

If the Raker is the smaller diameter, you may want to look for a larger diameter prop with more blade area to try out. And try switching back and forth between the 3-blade speed props and the 4-blade all-around props.

Prop testing is fun!! :thumb:

You may end up selling that 24" bracket and installing a 12" setback jack plate when all is said and done..................
 
JW said:
So for sure then, that's why he added the trim tabs since everything else is the same. Isn't the Raker a small diameter prop like the Laser II? I'm not familiar with the JohnyRude props, what's the diameter of the Raker?

Reason I ask is the Laser II is made for smaller horsepower/shorter boats and has a smaller diameter, somewhere in the 13 3/4" range (depends on pitch). The Tempest Plus came out for the longer/heavier bass boats. Made to run higher, has larger diameter and bigger blades, somewhere in the 14 1/2" range (depending on pitch once again).

If the Raker is the smaller diameter, you may want to look for a larger diameter prop with more blade area to try out. And try switching back and forth between the 3-blade speed props and the 4-blade all-around props.

Prop testing is fun!! :thumb:

You may end up selling that 24" bracket and installing a 12" setback jack plate when all is said and done..................
Click to expand...

The raker is 14 1/2 x 24 and I can get my hands on 14 1/2 x 26 raker to try. I've also got 25p Renegade prop (4 blade) coming. But yes the only difference is the trim tabs were added at some point. Do you think my motor would clear the transom with only a 12" setback? I was thinking more like 18" or 19" like Randy is running on the 24' Pulsares.
 
SCT said:
Robbie, I think I would mess w/ setup, props and a Bob's stabilizer plate before messing with the setback. Good luck-
Click to expand...

SCT do you think I need to add the trim tabs back or add the Bob's Stabilizer?
 
Good news

I took the in line filter off earlier and my oh my you should see the trash in the gas/filter. I guess a stopped up filter will make the motor shut down, which it did act like not getting fuel to the engine. Here's some pictures:
DSCN0416.jpg

DSCN0415.jpg
 
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