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24-07-2009, 09:03 AM
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#1
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Registered User
Country: engalnd
Location: south west
Interests: ski racing
Boat name: Jack'd up, hellraiser
Boat make: Bernico 19 ET, ring 16
Engines: merc 135, merc 175, yam 90
Cruising area: Plymouth
Join Date: Jun 2006
Location: south west
Posts: 1,176
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promx 225
i worry ALOT, as there was an odd sound comming form the rear, at ilfracombe as i came in, like a chunking sound
but anyway as on the subject thought id ask, is it normal of these engine at idle, on the hose pipe or in the water not to put any water though the tell tail, as soon as you acellerate, theres shed loads, but not when your just pottering around the harbour
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26-07-2009, 12:58 PM
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#2
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Registered User
Country: new zealand
Location: hamilton
Occupation: student
Interests: ski racing
Boat name: Anti Cyclone
Boat make: Light weight bullet 1850
Engines: Evunrude 225 Etec H.O
Cruising area: lakes and riverrs in the north island
Join Date: Jan 2009
Location: hamilton
Posts: 37
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225 Promax
Hey
Our promax sounds the same as yours at idle, there is no tell tale and when you get going there is plenty of water. Also do you have a water pressure gauge, we find ours vital.
About the noise im not really sure what your saying but ours idles realy rough when its warmed up.
Dont take my word about the noise though, you can never be to careful about engine noises.
Antic
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26-07-2009, 07:47 PM
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#3
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Our Promax sounds beautiful, purrs compared to the bridgeport it replaced.
It also chucks tons of water at idle and has buckets of pressure at full throttle, 25/28 psi
Is there thermostats in it? When was last time you changed water pump?
The BP used to chuck a good stream at idle with a healthy water pump but after a few weeks it started to dwindle. Half an hour and a tenner is cheep insurance I think!
Alan
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26-07-2009, 10:48 PM
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#4
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Registered User
Country: engalnd
Location: south west
Interests: ski racing
Boat name: Jack'd up, hellraiser
Boat make: Bernico 19 ET, ring 16
Engines: merc 135, merc 175, yam 90
Cruising area: Plymouth
Join Date: Jun 2006
Location: south west
Posts: 1,176
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Yea have water pressure guage and I haven't really investegqted the found much, my promsx doings similar to the first post, runs not rough, but certainlet wouldn't say it rsn as purry as an opti for instance
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27-07-2009, 12:03 AM
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#5
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Registered User
Country: new zealand
Location: hamilton
Occupation: student
Interests: ski racing
Boat name: Anti Cyclone
Boat make: Light weight bullet 1850
Engines: Evunrude 225 Etec H.O
Cruising area: lakes and riverrs in the north island
Join Date: Jan 2009
Location: hamilton
Posts: 37
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225 Pro max
25/28 psi. Oh my god thats huge, we get about 2 at idle and 11 at full throttle we were concerned with this but our mechanic assured us that its fine. He also says that the engine is in tip top condition (except the gearbox which is currantly shagged.
Ok my description of rough idle may have been the wrong way to describe it, you know its never gonna stall or anything like that, what i mean to say is that it has lumpy idle around 700 - 750rpm.
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27-07-2009, 12:58 AM
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#6
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Quote:
Originally Posted by antic55
we get about 2 at idle
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yeah, that's about right, what gearcase did you run, may have something to do with water pressure.
I think all the mercs have a lumpy idle
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27-07-2009, 04:18 AM
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#7
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Registered User
Country: new zealand
Location: hamilton
Occupation: student
Interests: ski racing
Boat name: Anti Cyclone
Boat make: Light weight bullet 1850
Engines: Evunrude 225 Etec H.O
Cruising area: lakes and riverrs in the north island
Join Date: Jan 2009
Location: hamilton
Posts: 37
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Promax 225
We run a sporty(which were not really happy with), which i think our mechanic said is the reason for the low water pressure. I have to admit i think the lumpy idle sound mint.
Were just waiting for our mechanic to get back from belgium so he can rebuild it.
Antic.
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27-07-2009, 10:08 PM
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#8
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Registered User
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
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Your Promax had brand new stats in the weekend you picked it up. Your tell tail should just be spitting a little at idle and on the tap as the stats should be closed. As long as your getting 15psi plus when moving then your cooling system is working fine.
I took advice from Jay Smith on weather or not to take the stats out of this engine. He told me that if I did it would cook it because its got steel liners and needs the water to travel slower to absorb the heat. Chaos however removed the stats from his later model 225 and ended up having to have a new piston put in his engine.
Chill Chris, Your engine is fine!
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I got jumper cables!
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27-07-2009, 10:49 PM
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#9
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Registered User
Country: engalnd
Location: south west
Interests: ski racing
Boat name: Jack'd up, hellraiser
Boat make: Bernico 19 ET, ring 16
Engines: merc 135, merc 175, yam 90
Cruising area: Plymouth
Join Date: Jun 2006
Location: south west
Posts: 1,176
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Told you I worry to much, ran the boat up on the hide today, and taking it out tomorra fir a propa run LOL, cheers for confirming my worries rob, the sound turned out to be a loose bolt... Well that's all I can track it back too
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28-07-2009, 02:01 AM
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#10
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Quote:
Originally Posted by MrRob
needs the water to travel slower to absorb the heat.
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Not one to question Jay Smith, but less water = cooler motor! I don't think so!
More water = cooler motor, less water = warmer motor, which is what you want on a steel bore. Aluminium (pistons) expands quicker than steel (cylinders).
should be 140* thermostats
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28-07-2009, 09:16 AM
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#11
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Registered User
Location: Belgium
Interests: Boating
Boat make: Hydrostream HST
Engines: Merc 2.5 200
Cruising area: The Schelde
Join Date: Dec 2005
Location: Belgium
Posts: 468
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Quote:
Originally Posted by Hydrostream
Not one to question Jay Smith, but less water = cooler motor! I don't think so!
More water = cooler motor, less water = warmer motor, which is what you want on a steel bore. Aluminium (pistons) expands quicker than steel (cylinders).
should be 140* thermostats
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The water may not travel too fast because it has to pick up the heat. When it flows slower it will pick up more heat. (but than again too slow isnt a good idea either)
This is what I read somewhere...
Imo you just have to run the stock cooling on any engine. Steel sleeves => 2 piece adapter & Bp, 260 & 280 => 1 piece
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www.geocities.com/fletcher_arrowbeau
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28-07-2009, 09:49 AM
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#12
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Registered User
Country: SOUTH WEST UK
Location: WESTON SUPER MARE
Occupation: MERCEDES SALESMAN
Interests: POWER BOAT RACING
Boat name: BIG AIR
Boat make: PHANTOM 19
Engines: 200XS
Cruising area: BRISTOL CHANNEL
Join Date: Mar 2008
Location: WESTON SUPER MARE
Posts: 792
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Quote:
Originally Posted by freedom
Told you I worry to much, ran the boat up on the hide today, and taking it out tomorra fir a propa run LOL, cheers for confirming my worries rob, the sound turned out to be a loose bolt... Well that's all I can track it back too
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You racing at Torquay then?Nic
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29-07-2009, 12:12 AM
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#13
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Registered User
Country: England
Location: West Sussex
Occupation: IT Manager
Boat make: Phantom 21, Plancraft Seaflite
Engines: Merc V6, mercruiser V8
Cruising area: Littlehampton, Fowey
Join Date: Aug 2004
Location: West Sussex
Posts: 116
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Quote:
Originally Posted by Hydrostream
Not one to question Jay Smith, but less water = cooler motor! I don't think so!
More water = cooler motor, less water = warmer motor, which is what you want on a steel bore. Aluminium (pistons) expands quicker than steel (cylinders).
should be 140* thermostats
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That's a bit of a mistake, Jay never made that quote over a steel bore motor.
Jay always says you need to limit the water through a steel liner block so that it runs hotter. Otherwise you risk a cold sieze problem where the liners don't expand as fast as the pistons resulting in no clearance.
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29-07-2009, 12:32 AM
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#14
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Quote:
Originally Posted by marshan162
That's a bit of a mistake, Jay never made that quote over a steel bore motor.
Jay always says you need to limit the water through a steel liner block so that it runs hotter. Otherwise you risk a cold sieze problem where the liners don't expand as fast as the pistons resulting in no clearance.
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Which is exactly what is written there! No?
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29-07-2009, 12:40 AM
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#15
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Registered User
Country: England
Location: West Sussex
Occupation: IT Manager
Boat make: Phantom 21, Plancraft Seaflite
Engines: Merc V6, mercruiser V8
Cruising area: Littlehampton, Fowey
Join Date: Aug 2004
Location: West Sussex
Posts: 116
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Quote:
Originally Posted by Hydrostream
Which is exactly what is written there! No?
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Sorry mate that didn't look quite right 'quoting' your post, i should have quoted the earlier post originally quoting Jay. I agree with you. You need less water flowing through a steel motor so that it runs hotter
Hope that's clearer
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29-07-2009, 12:47 AM
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#16
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Quote:
Originally Posted by marshan162
Sorry mate that didn't look quite right 'quoting' your post, i should have quoted the earlier post originally quoting Jay. I agree with you. You need less water flowing through a steel motor so that it runs hotter
Hope that's clearer
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No bother mate, sometimes I have trouble understanding myself, and wonder if anyone has a clue what I'm on about!
Al
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12-08-2009, 06:12 PM
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#17
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Trade Member
Country: United States
Location: South Texas. USA
Occupation: Own JSRE ( Jay Smith Racing Engines )
Interests: ACCELERATION (anykind )
Join Date: Jan 2006
Location: South Texas. USA
Posts: 244
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The Pro Max with the 40 amp charging systems can and will make a thump thump thump as the flywheel is passing the charging magnets at a slow idle.
Jay @ JSRE
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