Eric Combs
Active Member
- Joined
- Aug 11, 2011
- Messages
- 35
- Reaction score
- 0
Hey Guys -
This past weekend I purchased a used 1996 Nitro 884 Savage with a 1996 Mercury 150 EFI, Nitro Series, motor. The boat runs terrific and I was going through my regular maintenance and found something a bit strange.
I took it out on the lake on Sunday to run it around for a bit. I noticed the telltale wasn't very strong at idle and I got a reading of about 3-5psi on my water pressure gauge. I thought it was a bit low but decided to take it for a spin anyway. I gave it some throttle and the water pressure jumped up to around 10PSI. I ended up running it WOT for about 20-30 minutes total and not once received the dreaded 'BEEEEEEP' indicating high engine temperature. Before heading back, after having just started the motor and right after the thermostats opened up and the telltale started 'peeing' again, I stuck my hand back there and it was pretty darn hot... But still, no warning beep (and it does work - it beeps at me when I turn the the key in the ignition).
I was somewhat concerned about it so I went ahead and replaced the water pump impeller - that was a fun job for one person to handle (lol) - but I got it done within about two and a half hours (my first impeller change ever). I started the motor up and it took a bit for the thermostats to open up and for the water to begin coming out of the telltale again - but it was the same as before. I checked my water pressure gauge and it read about 5psi.
Now - here's where the odd part begins. With the muffs on in the driveway, I gave it throttle and the telltale stream got more constant and stronger - the water pressure jumped up to about 10 PSI or so. I gave it a little more throttle (maybe 3500 RPM) and the telltale stream completely stopped. I laid off the throttle and let it go back to idle and after about 30 seconds the stream began flowing again - water pressure read about 5psi. I let it idle for a bit and then tried again - got the same result.
I let it back to idle and watched it for a few minutes. I could see steam coming off the telltale - by no means a giant cloud of steam (which is how I saw one guy describe it on a forum) but enough to be noticeable from about a foot away.
My question: Do I seem to have a problem or is this normal for these 1996 Mercury 150 EFI (V-150EFI) motors? Any help would be greatly appreciated.
Eric
This past weekend I purchased a used 1996 Nitro 884 Savage with a 1996 Mercury 150 EFI, Nitro Series, motor. The boat runs terrific and I was going through my regular maintenance and found something a bit strange.
I took it out on the lake on Sunday to run it around for a bit. I noticed the telltale wasn't very strong at idle and I got a reading of about 3-5psi on my water pressure gauge. I thought it was a bit low but decided to take it for a spin anyway. I gave it some throttle and the water pressure jumped up to around 10PSI. I ended up running it WOT for about 20-30 minutes total and not once received the dreaded 'BEEEEEEP' indicating high engine temperature. Before heading back, after having just started the motor and right after the thermostats opened up and the telltale started 'peeing' again, I stuck my hand back there and it was pretty darn hot... But still, no warning beep (and it does work - it beeps at me when I turn the the key in the ignition).
I was somewhat concerned about it so I went ahead and replaced the water pump impeller - that was a fun job for one person to handle (lol) - but I got it done within about two and a half hours (my first impeller change ever). I started the motor up and it took a bit for the thermostats to open up and for the water to begin coming out of the telltale again - but it was the same as before. I checked my water pressure gauge and it read about 5psi.
Now - here's where the odd part begins. With the muffs on in the driveway, I gave it throttle and the telltale stream got more constant and stronger - the water pressure jumped up to about 10 PSI or so. I gave it a little more throttle (maybe 3500 RPM) and the telltale stream completely stopped. I laid off the throttle and let it go back to idle and after about 30 seconds the stream began flowing again - water pressure read about 5psi. I let it idle for a bit and then tried again - got the same result.
I let it back to idle and watched it for a few minutes. I could see steam coming off the telltale - by no means a giant cloud of steam (which is how I saw one guy describe it on a forum) but enough to be noticeable from about a foot away.
My question: Do I seem to have a problem or is this normal for these 1996 Mercury 150 EFI (V-150EFI) motors? Any help would be greatly appreciated.
Eric