2003 Maxum 2700 can't get on plane

[mmwjr]

Not sure how vessel view works so I would call mercruiser and tell them what you are seeing as it seems like it’s saying no readings from a starboard engine

[shrew]

Originally Posted by golfwins

Potential new owner here. I'm looking to purchase a 2003 Maxum 2700 with the 350 Mag MPI engine.

Are you going to purchase this boat, or did you purchase it?

If you are going to purchase it, why is this your problem?

If you purchased it, why did you do so with such issues?

[golfwins]

I purchased the boat at a discount after doing the compression check. The rest of the boat is in great shape. Once I figure out the engine issue, repaint the drive, and fix the bellows it should be an excellent boat.

This boat pretty much checked all the boxes for me. I wanted a windlass, radar arch, generator, air condition, and wanted to test out the slip world.

My last boat was always trailered and was missing all if those items. It was a 24ft cruiser.

I'm going to have it oulled out if the water soon so that I can paint the drive and replace the bellows, shift cable, trim senders, and gimbal bearing so the engine will be the last big issue.

I purchased vessel view mobile, but it doesnt give a ton of messages. I'm close to purchasing the Diacom software.

I've only replaced the spark plugs, rotor and cap, and checked the fuel pickup/ball check valve. Funny thing is when I replaced the cap and rotor it start tobeep and lose RPMs at times. Wasn't doing that before. Maybe I have a bad spark plug wire. I have a new Mercury set on the way.

I need to test the TPS and crank sensor too, but haven't had a chance yet.

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[golfwins]

New mercury plug wires installed today. No alarms and no cutouts or drops in RPMs.

It still doesn't run like it should though. In the screenshot, you can see my RPMs and top speed. Not good.

The prop is a 20P and Mercury seems to show that it should be closer to a 22P. I wonder how this would change things.

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[mmwjr]

Increasing pitch will result in lower rpm and top speed. You need to decrease pitch. Don’t recall what drive you have.

[golfwins]

I have the bravo 3 with 2.20:1 ratio.

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[mmwjr]

What wS the result of the compression test and did you perform a leak down test as well?

[golfwins]

Sorry for not getting back to you Mike. The engine shows good compression and each cylinder within range of each other. I was lazy and didn't perform the leak down test. I purchased the test kit, but haven't used it yet.

I will have much more info on this thread in the near future. I just dropped a much of money on the Diacom Marine software. It should arrive in the next few days.

I just got done fixing a leak in the bellows. I pulled the drive, repaired some corrosion, and painted it. I replaced the ujoint and shift cable bellows, the shift cable, gimbal bearing, and the trim senders. I also had the props repaired and polished.

I'll post some diacom info in the next few days.

[golfwins]

I wasn't able to do a lot of testing at lunch today, but here is some initial info. This was all gathered at idle in the slip so no actual in use testing yet. I won't be able to get that done till next week. Let me know if you see anything glaring. I think all or most of the faults are sensors not connected. What do you think?

I think this is what the ECM has stored in it:

03MY 5.7L BRAVO
ECM# 864916
CAL#864377-005
AAAF_0008_5.7_EFI
DESIRED IDLE
600 RPM
TPS .22-0.90v IDLE
4.07-4.83v WOT
FUEL=38-43psi
MAP = 2-15 psi
SEA PUMP=0.5-15psi

FUEL PUMP&PWR RLY
81-99ohm
FINJ 12ohm
IAC 10.1 ohm
FUSE A-B IAC
ECM PWR
DIAGNOSTIC PWR
FUSE C-D FUEL PUMP
FUSE E-F IGN.SYSTEM
BATV 12.6-15.0
MAT 3.14
RPM LIMIT 5150
PROP RPM 4600-5000
CYL FIRING ORDER
1-8-4-3-6-5-7-2
SPARK PLUG TYPE
AC 41-932
OVER TEMP AND BLOCKPRESSURE LIMITS ARE CONTROLLED BY ENGINE GUARDIAN
SEE SERVICE MANUALFOR GUARDIAN INFO


This is what my ECM is reading at idle:



This is the fault history report.
Fault History report

09/27/2019 12:26:05


1. VEHICLE CONFIGURATION

Cust. Name: Jeremy
Engine Make: 350 MAG MPI
Engine Serial No: 0M643181
Model Year: 2003
System Type: MerCruiser PCM555

2. PERFORMANCE DATA

Parameter Description Value Unit

Engine Speed........................................ 690 RPM
Available Power..................................... 100 %
Coolant Temperature.............................. 116.60 °F
Fuel Flow Rate..................................... 1.00 GPH
Port Exhst Cool Temp.............................. 32.00 °F
Sea Pump Pressure.................................. 1.44 PSI
Starb Exhst Cool Temp............................. 32.00 °F
IAC Duty Cycle.................................... 90.95 %
Manifold Absolute Pressure......................... 6.15 PSI
Trim Position...................................... 1023 #
Baro Pressure..................................... 14.36 PSI
Trim Volts......................................... 4.99 VDC
Manifold Air Temperature.......................... 86.00 °F
Pitot ADC............................................. 0 #
Oil Pressure...................................... 44.95 PSI
Paddle Wheel.......................................... 0 Hz
Throttle Position.................................. 0.00 %
Sensor Power....................................... 5.01 VDC
Throttle Sensor Voltage............................ 0.61 VDC
Lake/Sea Temp..................................... 32.00 °F
Spark Advance...................................... 3.69 DEG
Fuel Level......................................... 1023 #
Battery Voltage................................... 14.22 VDC

3. TROUBLE CODE STATUS

Current ECM Codes

Sensor Fault, click Read Fault button for details

Freeze Frame Data:

0 TRIM CKT HI
--------------------------------------------------------------------
FF Baro Pressure 14.36 PSI
FF Battery Volts 8.85 VDC
FF Sea Pump Pressure 0.00 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 84.20 °F
FF Coolant Temp 84.20 °F
FF Demand 0.00 %
FF Engine Speed 104 RPM
FF Engine State Crank
FF FPC Total 0.0 Counts
FF Frequency Count 449
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 0.00 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 13.51 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.08 %
FF Available Power 50 %
FF Run Time 387.92 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.00 %
FF Trim Position 0.00 %

1 STEER CKT LO
--------------------------------------------------------------------
FF Baro Pressure 14.36 PSI
FF Battery Volts 9.20 VDC
FF Sea Pump Pressure 0.01 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 86.00 °F
FF Coolant Temp 84.20 °F
FF Demand 0.00 %
FF Engine Speed 147 RPM
FF Engine State Crank
FF FPC Total 0.0 Counts
FF Frequency Count 420
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 0.00 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 13.44 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.19 %
FF Available Power 50 %
FF Run Time 387.92 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.00 %
FF Trim Position 0.00 %

2 SEA TMP CKT HI
--------------------------------------------------------------------
FF Baro Pressure 14.36 PSI
FF Battery Volts 9.79 VDC
FF Sea Pump Pressure 0.35 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 86.00 °F
FF Coolant Temp 84.20 °F
FF Demand 0.00 %
FF Engine Speed 629 RPM
FF Engine State Running
FF FPC Total 106.5 Counts
FF Frequency Count 402
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 13.48 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 9.98 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.37 %
FF Available Power 1 %
FF Run Time 387.92 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.00 %
FF Trim Position 0.00 %

3 FUEL LVL CKT HI
--------------------------------------------------------------------
FF Baro Pressure 14.36 PSI
FF Battery Volts 13.60 VDC
FF Sea Pump Pressure 1.06 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 86.00 °F
FF Coolant Temp 84.20 °F
FF Demand 0.00 %
FF Engine Speed 1044 RPM
FF Engine State Running
FF FPC Total 19.0 Counts
FF Frequency Count 393
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 2.42 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 4.85 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.43 %
FF Available Power 2 %
FF Run Time 387.92 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.00 %
FF Trim Position 0.00 %

4 PITOT CKT LO
--------------------------------------------------------------------
FF Baro Pressure 14.36 PSI
FF Battery Volts 13.70 VDC
FF Sea Pump Pressure 1.07 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 86.00 °F
FF Coolant Temp 84.20 °F
FF Demand 0.00 %
FF Engine Speed 964 RPM
FF Engine State Running
FF FPC Total 19.0 Counts
FF Frequency Count 395
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 2.42 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 4.94 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.45 %
FF Available Power 2 %
FF Run Time 387.92 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.00 %
FF Trim Position 0.00 %

5 FUELPUMP RLY CK
--------------------------------------------------------------------
FF Baro Pressure 14.36 PSI
FF Battery Volts 14.59 VDC
FF Sea Pump Pressure 1.21 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 132.80 °F
FF Coolant Temp 154.40 °F
FF Demand 0.12 %
FF Engine Speed 656 RPM
FF Engine State Power Off
FF FPC Total 0.0 Counts
FF Frequency Count 0
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 0.00 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 6.67 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.26 %
FF Available Power 100 %
FF Run Time 383.95 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.12 %
FF Trim Position 0.00 %

6 LOW DRIVE LUBE
--------------------------------------------------------------------
FF Baro Pressure 14.41 PSI
FF Battery Volts 14.00 VDC
FF Sea Pump Pressure 0.00 PSI
FF Boat Speed 0.00 #
FF Manifold Air Temp 96.80 °F
FF Coolant Temp 111.20 °F
FF Demand 0.00 %
FF Engine Speed 0 RPM
FF Engine State Stall
FF FPC Total 0.0 Counts
FF Frequency Count 11
FF Fuel Level 0.00 %
FF Gear Position Neutral
FF Lake Temp 32.00 °F
FF Engine Load 0.00 %
FF Main Pwr Relay Requests YES
FF Manifold Air Pressure 14.41 PSI
FF Oil Level 0.00 %
FF Port Tab Pos 0.05 %
FF Available Power 100 %
FF Run Time 387.92 hrs
FF Starboard Tab Pos 0.00 %
FF TPS Percent 0.00 %
FF Trim Position 0.00 %

Fault Log Data
Fault Descriptions Seconds

Battery Range High: 0
Battery Range Low: 0
Block Pressure is Low: 0
Compressor Temp Overheat: 0
ETC Motor Open: 0
ETC Motor Short: 0
Fuel Pressure Sensor Input High: 0
Fuel Pressure Sensor Input Low: 0
Guardian Strategy: 0
Knock Sensor 1: 0
Knock Sensor 2: 0
Low Oil Pressure Strategy: 0
Low Oil Remote Strategy: 0
Low Oil Reserve Strategy: 0
MAP Sensor 1 Input High: 0
MAP Sensor 1 Input Low: 0
MAP Sensor 1 Idle Rational: 0
Oil Pump Output: 0
Overspeed: 0
Port Clnt Overheat: 0
Starboard Clnt Overheat: 0
Warning Horn Output: 0
Water In Fuel: 0

Engine Run Time History:

Total engine run time: 387.93 Hours
0 - 749 RPM: 131.45 Hours
750 - 1499 RPM: 74.13 Hours
1500 - 2999 RPM: 73.77 Hours
3000 - 3499 RPM: 21.63 Hours
3500 - 3999 RPM: 46.57 Hours
4000 - 4499 RPM: 33.05 Hours
4500 - 4999 RPM: 7.33 Hours
5000 - 5499 RPM: 0.00 Hours
Over 5499 RPM: 0.00 Hours

[golfwins]

It's funny because I met and spoke to a guy in a slip near mine and he said he had the same engine, same problem. He ended up pulling all everything off and carbing it. He said it runs great now. I hope that I don't get to that point.

[mmwjr]

The only thing that stands out to me is the timing advance which for old school (carb) would have a base timing of 8*. Yours is showing -0.75*.

Would be interested to see if it increases with higher rpm.

[golfwins]

Here is a video from today. I don't see anything out of the norm. My drive fluid reservoir puked a bunch of fluid into my bilge this evening. Not sure why other than slightly over filled.

Anyway, here is the video. You may need to pause during the video to see the numbers change. I was by myself this evening so I was able to get the boat on plane, but only to about 27 MPHs. I've read others are more in the 38-40 range. I can't get on play with a couple of passengers.


https://youtu.be/tadr5WbUBwA

[mmwjr]

Based on max rpm I’m assuming the boat got on plane with just you. It would be interesting to repeat this test but with passengers on board and not being able to plane.

[jparsons121]

Originally Posted by mmwjr

The only thing that stands out to me is the timing advance which for old school (carb) would have a base timing of 8*. Yours is showing -0.75*.

Would be interested to see if it increases with higher rpm.

Agreed.. Base timing is off and at full throttle is only 24 degrees.
Newer vortec heads like 28 degrees (older ran the more traditional 32 degrees total advance).

Set the base timing according to instructions and retest.

[golfwins]

I don't think you can set timing on this motor, but I'll see if I can find out what timing should be at WOT for this motor.

[jparsons121]

Advance is fixed by the control module. Base timing is still set by rotating the distributor.
Review the instructions in the manual for setting the ignition module into Service or Base Timing mode.

[Phillbo]

Originally Posted by golfwins

My drive fluid reservoir puked a bunch of fluid into my bilge this evening. Not sure why other than slightly over filled.

https://youtu.be/tadr5WbUBwA

That would concern me....

How good of a deal did the seller let you have on this boat?

[golfwins]

Which part concerns you, something in the video? The timing? About 9k off the next lowest similarly equipped fresh water boat.

I went to due a misfire test this evening, but my computer was having an issue and I only got through 2 cylinders. Both appear to be contributing fine.

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[Phillbo]

Originally Posted by golfwins

Which part concerns you

"My drive fluid reservoir puked a bunch of fluid into my bilge this evening"

Your boat appears to have many issues..Sometimes a deal is not such a deal in the long run.

Why is your drive puking fluid?

[golfwins]

Ahh, okay. I just got done painting the drive and doing a complete bellows job. I'm guessing it had some air in the line. I didn't do a good job of keeping the reservoir full.

I felt like I got a good enough deal that if I have to rebuild the engine over the winter I'm fine with that. I love to try and fix things. I'm actually bidding on a 79 Carlson right now that needs some work. I have no idea how to fix it, but that's the fun part.

Don't get me wrong, I thought I would have figured out my engine issue by now, but I've had some things come up that have kept me away from it. I'll be able to do every test in my Diacom software this weekend and report back.

I was just hoping someone would see something in the video that I'm not seeing. I'm not sure about the timing and the MAP readings.



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