Changed the prop and a few additions

Rossco32 · #1 12-10-2006, 11:02 AM

Thanks to Iain (online store) I've got a mobile billboard!

Bear · #2 12-10-2006, 11:17 AM

Looking good Rosco. Do you have a rod strap for the deck??

BIG PETE · #3 12-10-2006, 11:20 AM

Rossco

that looks wiked mate
i just had some stickers put on my cruiser to i better get some bream master stickers for it to

Rossco32 · #4 12-10-2006, 11:23 AM

I played around with the idea of swapping props as I was getting around 5800 rpm at wot with two onboard, a few hundred rpm over the motors recomended max. and it would pull to 6k with just me onboard, not too good for longevity!

The other prob I wanted to get rid of was the excessive torque through the steering when tooling around near max speed with any amount of positive trim.

I ended up going to a Solas AMITA 4 blader in the same (19 inch) pitch as the three blader I was running previously. The first run was a little disappointing with the rpm holding below 5000.....

What to do?

After consulting a prop expert I was recomended to raise the motor 2-3 inches.

After some initial hesitation I took his advice.....

The result???

Lifted 3 inches.....

Abolutely no torque load on the steering!

9 knot increase in top speed!

Much better bow lift with LESS trim.

And best of all a 2-3 foot rooster tail!!!!

Like it? No LOVE IT!!!

Rossco

Rossco32 · #5 12-10-2006, 01:23 PM

Quote:

Originally posted by Bear
Looking good Rossco. Do you have a rod strap for the deck??

No as the fore deck is stepped down where the live wells are leaving too much unsupported rod hanging behind the step.

It has a horizontal rod rack along the port side and a vertical 3 rod holder each side next to the wells.

I thought about modding the front of the console (read: cut a hole in it!) to allow the butt of two rods to sit into it for support and have shock cord strap for the front section on the deck.... decided against it after spending some time on the water.

Rossco32 · #6 12-10-2006, 01:35 PM

Deck layout:

GregL · #7 12-10-2006, 07:53 PM

Nice one Rossco

Nothing beats a nice rooster tail!

Ever thought of a small jack plate?

This will let you adjust it your sef and you can change it for summer and winter as they run differently in warm and cold.

Greg

Bear · #8 12-10-2006, 11:41 PM

Rosco, have a chat to Mullet as well. He had a few prop torque issues and actually went for a BLA prop that fixed the prob. He fiddled with the Solas props and they didn't really help the issue.

HTH.

Superduperman · #9 13-10-2006, 04:39 AM

Geez Ross, that boat gets better and better looking every time!

Rossco32 · #10 13-10-2006, 05:19 AM

Quote:

Originally posted by GregL
Nice one Rossco

Nothing beats a nice rooster tail!

Ever thought of a small jack plate?

Greg

Roost is good!

I toyed with the jack plate idea but decided against it, partly because I don't want go any higher and come across cooling water pressure issues, secondly it's only a 90 and there is no pad on the hull so i can't see it going much harder than it is now.

Rossco32 · #11 13-10-2006, 05:24 AM

Quote:

Originally posted by Bear
Rosco, have a chat to Mullet as well. He had a few prop torque issues and actually went for a BLA prop that fixed the prob. He fiddled with the Solas props and they didn't really help the issue.

HTH.

Thanks Bear but the torque is non existant now at wot with the 4 blade, exactly opposite to what many people experience when going from 3 to 4 blades.

If it was still torquing heaps now I'd probably switch the steering gear over to one of the nonfeedback types (I like the speed!).

Rossco32 · #12 13-10-2006, 05:27 AM

Quote:

Originally posted by Superduperman
Geez Ross, that boat gets better and better looking every time!

Cheers mate!

Slowly slowly now...i've still got some more work to do yet but nothing urgent, I'll keep doing odds and ends when I can't get out on the water.

Rossco

yellow door 1 · #13 13-10-2006, 06:33 AM

Everything they say is true.

Sacrifice getting out of the hole, for top end speed - check.

If you want to fly out of the hole, dont get the smaller prop - check

Learning to trim the engine - gets good fuel savings- check.

Running at WOT dramatically increases the amount of juice being sucked. And I mean dramatically. With the large outboards - the feul consumption over an hour begins to hit home. 55 litres per hour

EG. the boys call and say get over here - the ###### are going nuts. At WOT that doesnt amount to much. But if you miss 3 hot bights in a day you can cover over 100kms a day and there isnt much room left in the tank to get home.

Rossco32 · #14 13-10-2006, 08:28 AM

Quote:

Originally posted by yellow door 1
Everything they say is true.

(2) Sacrifice getting out of the hole, for top end speed - check.

(3)If you want to fly out of the hole, dont get the smaller prop - check

(1) Learning to trim the engine - gets good fuel savings- check.

Running at WOT dramatically increases the amount of juice being sucked. And I mean dramatically. With the large outboards - the feul consumption over an hour begins to hit home. 55 litres per hour

EG. the boys call and say get over here - the ###### are going nuts. At WOT that doesnt amount to much. But if you miss 3 hot bights in a day you can cover over 100kms a day and there isnt much room left in the tank to get home.

1.Knowing how to drive a boat already (masterclass 5) -CHECK

2. Repropping to REDUCE wot RPM - Check
Sacrificing the hole shot? - NOPE (0 -25 knots in 8 seconds) - higher top speed YES (BONUS!!)

3.Higher cruise speed (3500 rpm) resulting in BETTER ecomony (Smaller prop? My Yamaha is rated to 5500 rpm I was running 5800 with the three blade) - CHECK

Running at wide open throttle has an effect on fuel consumption............do ya think??!!??

I run a 90 hp max consumption is listed as 35 litres per hour by yamaha........I've not yet seen more than approx 10 - 15 per hour........and yes I do drive flatout where I legally can on the Swan.

Yellowdoor1 not appearing to understand what I was trying to achieve (reduction in Wot rpm, less torque at the helm AND BETTER EFFICIENCY!!)- CHECKMATE!!

(All tongue in cheek of course

)

yellow door 1 · #15 13-10-2006, 09:17 AM

Quote:

Originally posted by Rossco32

Yellowdoor1 not appearing to understand what I was trying to achieve (reduction in Wot rpm, less torque at the helm AND BETTER EFFICIENCY!!)- CHECKMATE!!

(All tongue in cheek of course )

Loving your form Rossco.

I stuffed up. I've been rumbled. I love a good roasting even when its my own hide