Water Pressure

McLovin · Post by **McLovin** » Tue Jan 06, 2009 3:32 pm

Can someone here that actually Knows what they are talking about

tell me what the water pressure gage should read when running at say 4000 rpms & while it is idling. I hit a sand bar last week at Mcclure & after getting pulled off, my motor alarm went off while i was idling. I turned the motor off and let it cool down, then I started it and ran up to 4000 rpms and the pressure came up to about 17. every thing seemed fine till I went out again this week. I idled all the way out of rivers end & it was fine, But later when I idled out of disco the alarm went off again. While idling my gage doesnt move. It is a 2007 225 mercury opti. I am trying to figure out if I need to replace the impeller. They want $300. Thankyou in advance for taking the time to respond. Jesse Ochoa

Brian · Post by **Brian** » Tue Jan 06, 2009 3:35 pm

Not sure on the Pressure for your boat, but I do know it is not that hard to replace the impeller yourself..............

gabuelhaj · Post by **gabuelhaj** » Tue Jan 06, 2009 4:32 pm

Sounds like the water strainer that feeds the compressor is plugged up and your alarm is actually sounding because of your compressor overheating, not because of the V-6 head temps.

I wouldn't run your motor until you get it checked as you may loose your compressor! And, those aint cheap!

Get a shop manual or trace the water lines from the compressor to where it feeds into the block as this is where the strainer is. I think it goes through the fuel cooler.

You can google it and check out a Clymer's on-line manual that will show this as well.

BTW, on an Opti, idle should be 1.5 to 4lbs and WOT should be 15lbs. This is MINUMUM!!

Good luck!

TritonBrent · Post by **TritonBrent** » Tue Jan 06, 2009 7:29 pm

Hey Jesse, My motor runs about 6 lbs at idle and around 22 wide open. At 4000 I would say your numbers are good. The no presure at idle is not good though. I would say more than likely some **** plugged up in the lower unit or tstat.

And $300 sounds very high. C&C in Modesto fixed my water presure problem last year for much much less that that.

Try back flushing the motor and see if any debris comes out

Grape Ape · Post by **Grape Ape** » Tue Jan 06, 2009 7:44 pm

Jesse,
Contact Paul at C & C Marine (209) 526-4120. They're the best!

DeltaDan · Post by **DeltaDan** » Tue Jan 06, 2009 7:49 pm

TritonBrent wrote: Try back flushing the motor and see if any debris comes out

+2

You can make/get the fitting at any OSH, Lowes, Home Depo. Take your plug in with you to make sure you have the correct size and thread. (I have and EFI so I don't know where the plug is for the Opti's) ...And you can make one yourself out of Brass fittings or even a galvanized swedge for around $6 or less.

I do it for regular maintance almost every time I re-add oil to my boat.

NoCAL · Post by **NoCAL** » Wed Jan 07, 2009 8:30 am

Basically had the same problem last year when I ran the motor through sand at Oroville. You probably do need a new impeller and/or thermostats. My '04 225 doesn't read any water pressure at idle either. The analog gauges are just not that accurate without some pressure. At 4000 you should be in the range of 12-15lbs. At WOT I'm at about 20lbs. $300 sounds high for just a water pump replacement. I'd think you could get the water pump and thermostats for that price. Check with Galaxie. They'll give you an estimate over the phone.

NoCAL

blkdog812 · Post by **blkdog812** » Wed Jan 07, 2009 5:08 pm

i'd try the flush out first. but ur probly due for a new impeller. have them chk the compressor screen too.
my guess the $300 is probly for a lower unit service which should include new impeller/ new housing and new lower unit fluid change.

McLovin · Post by **McLovin** » Wed Jan 07, 2009 5:29 pm

Hey guys thanks for the advice. I did flush the motor but that didnt change anything. I could not find the screen that one of you mentioned. I am an a wheelchair so its kind of hard to get to things. I decided to take it to the new triton dealer in stockton. I will see how that goes.

TritonBrent · Post by **TritonBrent** » Wed Jan 07, 2009 6:08 pm

McLovin wrote:Hey guys thanks for the advice. I did flush the motor but that didnt change anything. I could not find the screen that one of you mentioned. I am an a wheelchair so its kind of hard to get to things. I decided to take it to the new triton dealer in stockton. I will see how that goes.

Call me if you need a hand with something!

gabuelhaj · Post by **gabuelhaj** » Wed Jan 07, 2009 7:27 pm

I'd be willing to help out if you have a water pump kit. Email me at gabuelhaj@hotmail.com and maybe if you get a couple of us together, we can get it done just for cost.

I'm here in Manteca and it shouldn't take long.

Leroy_B · Post by **Leroy_B** » Wed Jan 07, 2009 7:43 pm

where was that sand bar?? i'm heading to mcclure this weekend and you could save me some trouble if i know where it is.......

Turkeyman · Post by **Turkeyman** » Wed Jan 07, 2009 9:50 pm

Probably the same one I hit. Up the river channel about 400 yards from the left turn. The river filled in about 2oo yards with sand in less than a month.

McLovin · Post by **McLovin** » Thu Jan 08, 2009 10:15 am

Hey guys thanks for the offers. I had a couple of guys come over and look at it, but nobody really seemed to be sure of exactly how to fix it. Since it is still a new moter, I took it to the new triton dealer in stockton This morning. I just didnt want to take the chance of trying to save a couple of dollars and then it costing me thousands. thanks again . And yes turkyman you are exactly right it is up the river. I was at least a 100yrds further up the river just two week ago, thats why it caught me by suprise.