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TOPIC: 2556 trophy flybridge

2556 trophy flybridge 19 May 2017 05:55 #1

  • desuch
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so once again I am wondering if anyone has the package I do 5.7lit. 260 h.p carbed engine with the omc cobra outdrive and what kind of speed and rpms are you getting at WOT ? and what pitch prop you are using .I have been told by bayliner i should get 35 mph at 4600 rpm with the 15.5 x15 prop I get 3800 rpm with that prop went to the 15.5 x 13 4100 and 26 mph looking for input ,oh by the way 50 hours on new package run perfectly

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1988 flybridge trophy bayliner 2556 ,mercury 5.7 lit. OMC cobra out drive 76 hrs. on new package,
located in ketchikan ak,name DOMINION

2556 trophy flybridge 19 May 2017 06:49 #2

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desuch wrote: so once again I am wondering if anyone has the package I do 5.7lit. 260 h.p carbed engine with the omc cobra outdrive and what kind of speed and rpms are you getting at WOT ? and what pitch prop you are using .I have been told by bayliner i should get 35 mph at 4600 rpm with the 15.5 x15 prop I get 3800 rpm with that prop went to the 15.5 x 13 4100 and 26 mph looking for input ,oh by the way 50 hours on new package run perfectly


I have the same set-up on my 2459. I had a 15.5x15. It got dinged, so I put on the spare, a 15x17. Both allowed 4600rpm WOT @ 40kts.

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"B on D C", is a 1989 2459 Trophy Offshore HT, OMC 5.7L, Cobra OD, Yamaha 15hp kicker. Lots of toys! I'm no mechanic, just a blue water sailer and woodworker who loves deep sea fishing.
MMSI: 367637220
HAM: KE7TTR
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BoD, North Olympic Peninsula Puget Sound Anglers, Sequim, WA
Kevin

2556 trophy flybridge 19 May 2017 16:00 #3

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CptCrunchie wrote: I have the same set-up on my 2459. I had a 15.5x15. It got dinged, so I put on the spare, a 15x17. Both allowed 4600rpm WOT @ 40kts.

Wow, was that gps speed? That's about 46 mph......haulin azz :woohoo:

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

2556 trophy flybridge 19 May 2017 17:15 #4

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builderdude wrote:

CptCrunchie wrote: I have the same set-up on my 2459. I had a 15.5x15. It got dinged, so I put on the spare, a 15x17. Both allowed 4600rpm WOT @ 40kts.

Wow, was that gps speed? That's about 46 mph......haulin azz :woohoo:


WAHAHAHA!! OOPS! Good catch! 40MPH .....35kts. Duh!

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"B on D C", is a 1989 2459 Trophy Offshore HT, OMC 5.7L, Cobra OD, Yamaha 15hp kicker. Lots of toys! I'm no mechanic, just a blue water sailer and woodworker who loves deep sea fishing.
MMSI: 367637220
HAM: KE7TTR
TDI tech diver
BoD, North Olympic Peninsula Puget Sound Anglers, Sequim, WA
Kevin

2556 trophy flybridge 19 May 2017 17:25 #5

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Blame it on Friday :lol:

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

2556 trophy flybridge 19 May 2017 23:17 #6

  • desuch
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I really don't need the speed was just wondering what other 2556 owners are getting for speed and rpm?

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1988 flybridge trophy bayliner 2556 ,mercury 5.7 lit. OMC cobra out drive 76 hrs. on new package,
located in ketchikan ak,name DOMINION

2556 trophy flybridge 20 May 2017 11:52 #7

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FYI and FWIW........ this boat is a candidate for the DP-S conversion!
That would give you more speed and much better fuel economy!

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Rick E. Portland, Oregon
2850 Bounty Sedan Flybridge model
Twin 270 HP 5.7's w/ Closed Cooling
Volvo Penta DuoProp Drives
Kohler 4 CZ Gen Set

2556 trophy flybridge 20 May 2017 21:41 #8

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DP-S conversion? I certainly am open to all suggestions

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1988 flybridge trophy bayliner 2556 ,mercury 5.7 lit. OMC cobra out drive 76 hrs. on new package,
located in ketchikan ak,name DOMINION
Last Edit: by desuch.

2556 trophy flybridge 21 May 2017 11:04 #9

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desuch wrote: DP-S conversion? I certainly am open to all suggestions


This conversion will not be inexpensive.
However, it will solve any potential ESA issues, dog clutch issues, lower unit shift cable issues, and so on... and will offer more thrust to the water!
In other words.... no more ESA, no more Dog Clutch, no more lower shift cable!
The following user(s) said Thank You: desuch

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Rick E. Portland, Oregon
2850 Bounty Sedan Flybridge model
Twin 270 HP 5.7's w/ Closed Cooling
Volvo Penta DuoProp Drives
Kohler 4 CZ Gen Set

2556 trophy flybridge 21 May 2017 22:51 #10

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Read the following thread regarding swapping a Cobra dog to a VP sx generation leg, (been there, did that) be it single or dual prop.
Start keeping an eye out for a COMPLETE drive, the ONLY part you will not need is the transom shield.

www.baylinerownersclub.org/index.php/for...dog-to-cobra-sx-cone

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" WET EVER "
1989 2459 TROPHY OFFSHORE 5.8L COBRA / SX
mmsi 338108404
mmsi 338124956
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2556 trophy flybridge 22 May 2017 03:22 #11

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desuch wrote: I really don't need the speed was just wondering what other 2556 owners are getting for speed and rpm?

25 mph (gps) at 3300rpm no tabs. Can plane at 3100-3200 but seems to be happier when I bump rpm up a touch. Ran it today (95 miles) with a 3/4 tank at that speed and also at 31 mph at 4000rpm for a bit.

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
Last Edit: by builderdude.
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