Hello Everyone!
I am new to this forum and also a new owner of a 1999 Wellcraft Martinique 2600 with a Volvo Penta 5.7GSi and DP outdrive.
I have had the boat for about 6 months, and put 70 hours on the tach. A little background - the boat sat for a long period of time before I got it (several years). The manifolds and risers on the 5.7 were very rusted inside and cracks were iminent so I recently replaced them with new BARR aftermarket manifolds. I've been happy with the result. It overall has performed better than expected and I'm happy with the motor.
However, during a long slow cruise this past weekend I was giving the first mate (my lovely girlfriend too!) some instruction on proper handling of the boat. The first 2 hours of the drive were at <1500 RPM. We were just about to go over getting the boat on plane and proper trimming and she was gently accelerating. As we passed 2500 RPMs the power completely cutout, and she promptly put it in idle and shut the motor off.
I visually inspected everything and could find no abnormality, so I started the motor again. It idled perfectly, and no smoke or fumes were present in the engine room or the exhaust. All gauges appeared within operating limits and I could find nothing out of place.
So I proceeded to do the same thing, and again at 2500 RPMs it appeared to completely cut timing sputtering back to idle RPM. I can run at 2400 RPMs all day long, but the second I break the 2500 threshold it cuts out.
I gathered this meant the engine is in it's self protection "limp" mode triggered by one of several criteria. This got me to thinking that this could be related to my new manifolds. I have noticed that since installation the starboard is too hot to touch, but the port is nice and cool. I started digging, and pulled the hoses and eventually thermostat housing off to find debris in the starboart port in the housing.
I cleaned and replaced the thermostat, and reinstalled with all new hoses - patting myself on the back for a job well done excited to spend a trouble free day on the lake.
Not so fast. The manifold heat problem appears to be better and the desparity between sides isnt nearly as great, but its still present. HOWEVER, most troubling is the boat is still in its "Limp" mode. I decided to conceed this was past my pay grade, and motored over to my local marina thinking maybe a hard code was set and they needed to clear it out.
Much to my surprise, the tech insisted there were no codes showing up on the computer. While thankful for his help, I wasnt overly convinced he fully understood what he was looking at.. I am fairly tech savvy, so I nosed around his computer a bit and found a couple lines of data troubling. One was "Low oil pressure switch" - ON, and "Cause for power reduction" - ON. He was convinced that the gauge was showing oil pressure, so the comptuer should see that and "be fine". Also, supposedly this should be sounding an alarm, but I would not be surprised if the alarm was inoperative due to the long sit this boat enjoyed and its just seized up not working.
My questions are this -
1) Would low oil pressure cause a code to come up on his computer?
2) Why would the low oil pressure alarm be sounding if my gauge reads completely normally - with no change from the last 70 hours of operation?
3) Are there seperate oil pressure senders for both the gauge and the alarm?
4) If so, where are they located? I will inspect/replace the sender and wiring if I could get pointed in the right direction.
5) If I fix the inaccurate sender and fix the alarm condition, will the comptuer reset the "Limp" mode and resume normal operation automatically? Or will I have to have it cleared by a tech?
Side question that I know now is not related to this problem - Is the starboard manifold temperature out of the ordinary for this motor? It's definately hot to the touch, whereas the port is cool. I had a trace of steam before I found the debris, and now it's completely gone. I figure that alone is good news!
Sorry for the long winded post. I appreciate any info anyone could share. Thank you in advance for your help!
Respectfully,
Eric
I am new to this forum and also a new owner of a 1999 Wellcraft Martinique 2600 with a Volvo Penta 5.7GSi and DP outdrive.
I have had the boat for about 6 months, and put 70 hours on the tach. A little background - the boat sat for a long period of time before I got it (several years). The manifolds and risers on the 5.7 were very rusted inside and cracks were iminent so I recently replaced them with new BARR aftermarket manifolds. I've been happy with the result. It overall has performed better than expected and I'm happy with the motor.
However, during a long slow cruise this past weekend I was giving the first mate (my lovely girlfriend too!) some instruction on proper handling of the boat. The first 2 hours of the drive were at <1500 RPM. We were just about to go over getting the boat on plane and proper trimming and she was gently accelerating. As we passed 2500 RPMs the power completely cutout, and she promptly put it in idle and shut the motor off.
I visually inspected everything and could find no abnormality, so I started the motor again. It idled perfectly, and no smoke or fumes were present in the engine room or the exhaust. All gauges appeared within operating limits and I could find nothing out of place.
So I proceeded to do the same thing, and again at 2500 RPMs it appeared to completely cut timing sputtering back to idle RPM. I can run at 2400 RPMs all day long, but the second I break the 2500 threshold it cuts out.
I gathered this meant the engine is in it's self protection "limp" mode triggered by one of several criteria. This got me to thinking that this could be related to my new manifolds. I have noticed that since installation the starboard is too hot to touch, but the port is nice and cool. I started digging, and pulled the hoses and eventually thermostat housing off to find debris in the starboart port in the housing.
I cleaned and replaced the thermostat, and reinstalled with all new hoses - patting myself on the back for a job well done excited to spend a trouble free day on the lake.
Not so fast. The manifold heat problem appears to be better and the desparity between sides isnt nearly as great, but its still present. HOWEVER, most troubling is the boat is still in its "Limp" mode. I decided to conceed this was past my pay grade, and motored over to my local marina thinking maybe a hard code was set and they needed to clear it out.
Much to my surprise, the tech insisted there were no codes showing up on the computer. While thankful for his help, I wasnt overly convinced he fully understood what he was looking at.. I am fairly tech savvy, so I nosed around his computer a bit and found a couple lines of data troubling. One was "Low oil pressure switch" - ON, and "Cause for power reduction" - ON. He was convinced that the gauge was showing oil pressure, so the comptuer should see that and "be fine". Also, supposedly this should be sounding an alarm, but I would not be surprised if the alarm was inoperative due to the long sit this boat enjoyed and its just seized up not working.
My questions are this -
1) Would low oil pressure cause a code to come up on his computer?
2) Why would the low oil pressure alarm be sounding if my gauge reads completely normally - with no change from the last 70 hours of operation?
3) Are there seperate oil pressure senders for both the gauge and the alarm?
4) If so, where are they located? I will inspect/replace the sender and wiring if I could get pointed in the right direction.
5) If I fix the inaccurate sender and fix the alarm condition, will the comptuer reset the "Limp" mode and resume normal operation automatically? Or will I have to have it cleared by a tech?
Side question that I know now is not related to this problem - Is the starboard manifold temperature out of the ordinary for this motor? It's definately hot to the touch, whereas the port is cool. I had a trace of steam before I found the debris, and now it's completely gone. I figure that alone is good news!
Sorry for the long winded post. I appreciate any info anyone could share. Thank you in advance for your help!
Respectfully,
Eric
