Boatmad.com


Reply
 
Thread Tools Display Modes
 
Old 08-06-2005, 01:21 AM   #1
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
Fantastic!!!!

Been out in boat tonight sea was calm and i pulled 8200RPM running with bullet about 1" above, massive rooster tail and i achieved this!
Attached Thumbnails
Click image for larger version

Name:	dscf0961.jpg
Views:	837
Size:	38.1 KB
ID:	4090  
__________________

Burty is offline   Reply With Quote
Old 08-06-2005, 01:24 AM   #2
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
However on my next run in my quest for 85MPH this happened
Motor was still running but felt loss of power.
Attached Thumbnails
Click image for larger version

Name:	dscf0959.jpg
Views:	805
Size:	48.8 KB
ID:	4091  
__________________

Burty is offline   Reply With Quote
Old 08-06-2005, 01:26 AM   #3
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
When i saw this i thought, how lucky was that it could have cost me thousands but then i notices bits of aluminium in my base tray, and a hole in side of block and this
Attached Thumbnails
Click image for larger version

Name:	dscf0963.jpg
Views:	792
Size:	47.5 KB
ID:	4092  
Burty is offline   Reply With Quote
Old 08-06-2005, 01:27 AM   #4
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
Attached Thumbnails
Click image for larger version

Name:	dscf0964.jpg
Views:	782
Size:	37.3 KB
ID:	4093  
Burty is offline   Reply With Quote
Old 08-06-2005, 01:28 AM   #5
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
piston No. 2
Attached Thumbnails
Click image for larger version

Name:	dscf0965.jpg
Views:	770
Size:	83.2 KB
ID:	4094  
Burty is offline   Reply With Quote
Old 08-06-2005, 01:29 AM   #6
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
I think i have joined Roofer with lots of broken bits
Attached Thumbnails
Click image for larger version

Name:	dscf0966.jpg
Views:	758
Size:	67.7 KB
ID:	4095  
Burty is offline   Reply With Quote
Old 08-06-2005, 01:30 AM   #7
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
Bore and piston No.1
Attached Thumbnails
Click image for larger version

Name:	dscf0967.jpg
Views:	726
Size:	44.0 KB
ID:	4096  
Burty is offline   Reply With Quote
Old 08-06-2005, 01:35 AM   #8
Registered User
 
Ice Kiddie's Avatar
 
Country: UK
Location: At home
Occupation: IT stuff
Interests: danger boat
Boat name: Blue Ice
Boat make: Scorpion RIB 7.5m
Engines: Just the one :-(
Cruising area: In the sea

Join Date: Mar 2004
Location: At home
Posts: 469
Oh dear... that's very upsetting
Ice Kiddie is offline   Reply With Quote
Old 08-06-2005, 01:35 AM   #9
Registered User
 
Burty's Avatar
 
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer

Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
Send a message via AIM to Burty
in a nut shell this is what i believed happened.

piston number 2 gave up and broke up causing it to sieze in bore
crank and rods moving at 7500rpm said tough shit we aint stopping and ripped the rod off the piston
no.2 rod then smashed its way around punching a hole in the front half by the injectors and a hole in the bottom of hole no.1
all the bits of piston, bearings etc went everywhere including into the new hole in bore No.1 ruining that liner and piston too

Dunno why spark plug sheared but look on the bright side i now have some reeds and a cage i can sell to Taz
Burty is offline   Reply With Quote
Old 08-06-2005, 01:42 AM   #10
Registered User
 
Ice Kiddie's Avatar
 
Country: UK
Location: At home
Occupation: IT stuff
Interests: danger boat
Boat name: Blue Ice
Boat make: Scorpion RIB 7.5m
Engines: Just the one :-(
Cruising area: In the sea

Join Date: Mar 2004
Location: At home
Posts: 469
Quote:
Originally posted by Burty
Dunno why spark plug sheared...
Mebbe loose piston flew up to hit inside of spark plug, pushing conductive core outwards and cracking/shearing the ceramic?
Ice Kiddie is offline   Reply With Quote
Old 08-06-2005, 02:02 AM   #11
jw.
Registered User
 
jw.'s Avatar
 
Location: Scotland
Interests: Hole maker
Boat make: Humber Ocean Offshore
Engines: KAD 300/DPX

Join Date: Mar 2004
Location: Scotland
Posts: 954
Wow, Sherlock.




Burty...WTF
__________________
JW.
jw. is offline   Reply With Quote
Old 08-06-2005, 02:08 AM   #12
hello
 

Join Date: Mar 2004
Posts: 2,739
The plug snapped because the piston has hit the head really hard and the resulting shockwave hammered the end of the plug off.

The Pistons in that motor are Mahle's. They stopped making these pistons 10 years ago and as they weren't renowned for pin failure like the wiseco's that replaced them they may well be the original pistons, or new old stock. Either way I reckon they've been in there for quite some time and have probably just been re-ringed over and over. The side pins on those pistons are covered over by the ring and were still well in there, not loose at all. They were the best pistons ever made for the 2.5.

Any way it seems as if old age finally got to them. It looks as if the skirt broke up on No.2 piston. The side of the piston is fine no heat marks but in one area it looks as if some debris has got up the side and jamed it in there. The rod has then ripped out the back and proceeded to hammer the crap out of the engine internally including hammering the piston into the head. The top of the piston has a ring round it that matches up with the head. This maybe how the end of plug broke off. It also put a hole in the front case half and another hole just under the rod slot for cylinder No. 1. A roller from the small end roller bearing on the previoulsy mention No. 2 piston has then got into No. 1 snapped in half and found its way past the piston leaving two scores in the cylinder wall. Its/they have then bounced around inside No. 1 cylinder, hence all the half roller shaped marks in the top of the piston. Half the roller was found imbedded in the top of the piston and the other half in imbedded in the head.

So I guess it needs lots of welding, two sleeves, a new rod, 6 new pistons, bearings and gaskets etc. And best have some new reeds too as one of the cages has had a bit of a knock.

JamesM is offline   Reply With Quote
Old 08-06-2005, 08:54 AM   #13
Registered User
 
TheOrs's Avatar
 
Country: England
Location: Plymouth
Boat make: Fletcher Arrowflyte
Engines: Mercury 75

Join Date: Nov 2004
Location: Plymouth
Posts: 402
Quote:
Originally posted by Burty
Motor was still running but felt loss of power.
Probably still run faster than my boat

And there was me yesterday, feeling sorry for myself 'cause I need a new trim cylinder (£150) after 13 years.

Feeling for you dude.
TheOrs is offline   Reply With Quote
Old 08-06-2005, 10:12 AM   #14
Registered User
 
roofer's Avatar
 
Location: GOLDEN MILE
Boat name: LILY THE PINK AND TERMINATOR 11
Boat make: PHANTOM 21 AND 20
Engines: 2.5 EFI X 2

Join Date: Mar 2004
Location: GOLDEN MILE
Posts: 2,465
feel for you burty dude
__________________
PLEASE DON'T STEAL...THE GOVERNMENT DON'T LIKE THE COMPETITION
roofer is offline   Reply With Quote
Old 08-06-2005, 09:24 PM   #15
Registered User
 
MrRob's Avatar
 
Country: England
Location: Birmingham
Occupation: Scratching
Interests: Big Dinners
Boat name: Never Enough
Boat make: Seaquel 600xs
Engines: 225hp Merc ProMax
Cruising area: Anywhere! I prefer Weymouth

Join Date: May 2005
Location: Birmingham
Posts: 3,232
Send a message via AIM to MrRob
HOLLY MOLLY! Were you using TNT for fuel?
On the bright side and being honest with yourself I am sure you feel some sense of pride due to doing so much damage while attempting such insane speeds! Got any spares off that which would come in handy for my 225 promax?
__________________
I got jumper cables!
MrRob is offline   Reply With Quote
Old 08-06-2005, 10:10 PM   #16
Registered User
 
Location: Essex
Boat make: Phantom 21
Engines: Merc 2.5efi

Join Date: Mar 2005
Location: Essex
Posts: 337
I did exactly the same at Cardiff bay national putting a hole in the side of the block and i also snapped a plug and a rod. We thought ours was the computer but ya neva know. Ironic that we did the first race at about 7k for an hour, then towed a junior in the second race at about 4500k did about 20mins then she let go.
Dangerous is offline   Reply With Quote
Old 08-06-2005, 10:10 PM   #17
Taz
Registered User
 
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast

Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,032
Ah mate burty dude bad luck! and i was only thinking how good your engine was standard compared to the tuned ones, What are you going to do get it rebuilt or scrap it? Maybe intreasted in sum spares

Sod the merc get a yam or sumthing thats what i keep thinking
__________________
[
Taz is offline   Reply With Quote
Old 08-06-2005, 10:14 PM   #18
Taz
Registered User
 
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast

Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,032
Oh yeh 5 petal reeds are 440 dollars to your door from Jay Smith
__________________
[
Taz is offline   Reply With Quote
Old 08-06-2005, 10:46 PM   #19
Taz
Registered User
 
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast

Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,032
Dangerous were bouts you from in essex?
__________________
[
Taz is offline   Reply With Quote
Old 08-06-2005, 10:48 PM   #20
Registered User
 
Location: Essex
Boat make: Phantom 21
Engines: Merc 2.5efi

Join Date: Mar 2005
Location: Essex
Posts: 337
Colchester, we go to Stone ski club
__________________

Dangerous is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT +1. The time now is 09:51 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×