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Now low end power on 200HP EFI Merc

When I try to get out of the hole - my 200HP Merc doesn't seem to be running on all cylinders and won't get the boat on plane. It will periodically act like it wants to take off and give burst of power and then back to no low end power. When I put someone up in the front on the boat and get it on plane - it will run Ok - once it gets the RPM up?

It seems like it's not getting power to all of the cylinder and then all of a sudden it will go and then back to no power - can it be something electrical or is one of the injectors plugged?

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Did you ever find a fix for this? I am having the same issues with the same motor. I have spent $1400 so far and still intermittently broke. I think electrical also. I have searched the internet and found many people with the exact same problem and no solutions. One guy said broke blue wire to the cylinders 2 & 4. I checked my wiring and all appears ok unless broke inside the insulation and barely making contact. I pulled on all of them to see if they'd break. Very tough to troubleshoot when its so intermittent. Any help is appreciated. Thanks...

Posted on Sep 28, 2013

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Sound like a throtle positioning sensor but you need to change your spark plugs first always if you havent already

Posted on Jun 27, 2009

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While running my 90hp Merc 4 stroke engine dies,,, and no power to raise power tilt.... I wait a few minutes, then power tilt works & engine then starts Engine has no power, whe. Tilt has no power


I would be checking the tank vent is clear, then work along the fuel lines for air leaks preventing the pump from working properly
the power tilt should be electric motor operation and that indicates along with power loss, a low battery ( not charging) and if efi engine then that low power situation will result in low power for the engine controls
take it in for a proper diagnosis and quote

Sep 16, 2016 | Boating

1 Answer

My 04 vstar 1100 classic seems as if the rear cylinder is not putting out as much power as the leading cylinder


unless you have a misfire on the rear cylinder and as the two run of the same crank shaft this statement would be hard to pinpoint
Have a compression done on the engine to determine a drop in pressures
move the front injector (EFI) to the rear
if EFI have the fault codes read
IF carbureted with with a carby for each pot have the carbies tuned professionally
have the bike run a on a bike dyno for a power test

Jan 23, 2016 | Power Motorcycles

1 Answer

Harley engine codes


P0107 Map Sensor Open/Low
P0108 Map Sensor High
P0117 ET Sensor Low
P0118 ET Sensor High
P0112I AT Voltage Low
P0113I AT Voltage Open/High
P0120 TPS1 Range Error
P0220 TPS2 Range Error
P0122 TPS1 Low
P0123 TPS2 High/Open
P0131 Front Oxygen Sensor Low
P0132 Front Oxygen Sensor High
P0151 Rear Oxygen Sensor Low
P0152 Rear Oxygen Sensor High
P0154 Rear Oxygen Sensor Inactive.
P0222 TPS2 Low
P0223 TPS2 High/Open
P0261 Front Injector Open/Low
P0263 Rear Injector Open/Low
P0262 Front Injector High
P0264 Rear Injector High
P0373 CKP Sensor Intermittent
P0374 CKP Sensor Synch Error
P0444 Purge Solenoid Open/Low
P0445 Purge Solenoid High
P0562 Battery Voltage Low
P0563 Battery Voltage High
P0501 VSS Sensor Low
P0502 VSS Sensor High/Open
P0572 Brake Switch Low
P0577 Cruise Control Input High
P0603 ECM EEPROM Memory Error
P0605 ECM FLASH Memory Error
P06415 V+Vref 1 Out Of Range
P06515 V+Vref 2 Out Of Range
P1001 System Relay Coil Open/Low
P1002 System Relay Coil High/Shorted
P1003 System relay contacts open
P1004 System Relay Contacts Closed
P1009 Incorrect Password
P1010 Missing Password
P1270 TGS Validation Error
P1351 Front Ignition Coil Driver Open/Low
P1352 Front Ignition Coil Driver High/Shorted
P1353 Front Cylinder No Combustion
P1354 Rear Ignition Coil Driver Open/Low
P1355 Rear Ignition Coil Driver High/Shorted
P1356 Rear Cylinder No Combustion
P1357 Front Cylinder Combustion Intermittent
P1358 Rear Cylinder Combustion Intermittent
P1475 Exhaust Actuation Position Error
P1477 Exhaust Actuator Open/Low
P1478 Exhaust Actuator Shorted/High
P1501 Jiffy Stand Sensor Low
P1502 Jiffy Stand Sensor High P1510 EFI Limited
Performance Mode
P1511 EFI Power Management Mode
P1512 EFI Forced Idle Mode
P1514 Air Flow Fault
P1600 EFI Module Processor Internal Error
P2100 EFI Motor Circuit Open
P2101 EFI Motor Circuit Range Performance (Actuation
Error)
P2102 EFI Motor Circuit Low
P2103 EFI Motor Circuit High
P2105 EFI Forced engine shutdown
P2107 EFI Module Processor Internal Fault
P2119 EFI Motor Throttle Body Range Performance
P2122 TGS1 Low/Open
P2123 TGS1 High
P2127 TGS2 Low/Open
P2128 TGS2 High
P2135 TPS Correlation Error
P2138 TGS Correlation Error (Twist grip sensor)
P2176 EFI Closed Position Not Learned
U Codes
U1016 Loss of ECM ****** Data
U1064 Loss of TSM/FSFM ****** Data to ECM
U1097 Loss of Speedometer ****** Data to ECM
U1255 ****** Data Error
U1300 ****** Data Low
U1301 ****** Data High
Harley Davidson 2008 DTC Code Reading (draft)
Harley Davidson DTC Codes - Unofficial Guide Page 3
B Codes
B0563 Battery Voltage High.
B1121(TSM) Left Turn Output Fault
B1121(HFSM) Left Turn Output Open
B1122(TSM) Right Turn Output Fault
B1122(HFSM) Right Turn Output Open
B1123(HFSM) Left Turn Output Short to Ground
B1124(HFSM) Right Turn Output Short to Ground
B1125(HFSM) Left Turn Output Short to Battery
B1126(HFSM) Right Turn Output Short to Battery
B1131(HFSM) Alarm Output Low
B1132(HFSM) Alarm Output High
B1134 Starter Output High
B1135 Accelerometer Failed
B1136(HFSM) Accelerometer Tip Test Error
B1141(TSM) Ignition Switch Low/Open
B1141(HFSM) Ignition Switch Low/Open
B1142 Smart Security System Internal Fault
B1143(HFSM) Security Antenna Short to Ground
B1144(HFSM) Security Antenna Short to Battery
B1145(HFSM) Security Antenna Open
B1151 Bank Angle Sensor(BAS) Short to Ground
B1152 Bank Angle Sensor(BAS) Short to Battery
B1153 Bank Angle Sensor(BAS) High
B1154 Clutch Switch Input Short to Ground
B1155 Neutral Switch Input Short to Battery

Apr 11, 2014 | 2007 Harley Davidson FLHRC Road King...

1 Answer

Speedo steve


Pull any speedometer error codes:

1- Turn Ignition switch to OFF & Run/Stop switch is to Run.
2- Push odometer reset button in & hold.
3- Turn ignition switch to Ignition and release odometer reset button. Background lighting should illuminate, speedometer needle should sweep its full range and indicator lamps (battery, security, low fuel, check engine and cruise) should illuminate. The word "diag" should then appear.
4 - Push the odometer reset button once and you will see the selection menu "PSSPt" with the first P flashing.
5 - Each letter represents an area of the diagnostics module. The module that is flashing is the one you are going to check. To move from one letter (module) to the next, you push the odometer reset button one time. (from P to S to SP to t and back to P, etc.)
P = ECM/ICM (Electronic Control Module [EFI] / Ignition Control Module [Carbureted)
S = TSM/TSSM (Turn Signal/ Turn Signal Security Module)
SP = speedometer
T = tachometer
6 - To get the DTC within an area of diagnostics, push and hold the odometer reset button in for 5 seconds and release. If there are any DTC's the code will be displayed or the word "none" will appear if there are no DTC's. Push the odometer reset button again to view additional codes if they exist.
7 - Record the codes.
8 - If DTC's are not to be cleared, Press and release the odometer reset button. Part number of module will be displayed.
NOTE: To determine if a code is current or historic, clear the displayed code by pushing in and holding the odometer reset button ( longer than 5 seconds) until 'clear' comes up. Release the odometer reset button. Turn OFF the ignition switch. Run your bike and shut it down then recheck the DTC's again by repeating steps 1 to 9. If the code is current it will reappear.
9 - Press and release the odometer reset button to continue to the next module.
10 - Turn Ignition switch to OFF.
On models not equipped with a tachometer "No Rsp" will appear when the tachometer identifier is selected.
"No Rsp" will also appear if the run/off switch is in the off position when doing this procedure.

Now, once you have the error codes, what do they mean?

DTC FAULT CONDITION MODULE
"BUS Er" Serial data bus shorted/low/open/high
B0563 Battery Voltage High TSM/TSSM
B1004 Fuel Level Sending Unit Low Instruments
B1005 Fuel Level Sending Unit High/Open Instruments
B1006 Accessory Line Over voltage Instruments
B1007 Ignition Line Over voltage Instruments
B1008 Reset Switch Closed Instruments
B1122 Right turn output fault
B1125 (HFSM) Left Turn Output Short to Battery.
B1131 Alarm Output Low TSM/TSSM
B1132 Alarm Output High TSM/TSSM
B1134 Starter Output High TSM/TSSM
B1135 Accelerometer Fault TSM/TSSM
B1141 Ignition switch open/low
B1151 Sidecar BAS Low TSM/TSSM
B1152 Sidecar BAS High TSM/TSSM
B1153 Sidecar BAS Out of Range TSM/TSSM
P0106 MAP Sensor Rate of Range Error Carb
P0107 Map Sensor Failed Open/Low Carb
P0107 Map Sensor Open/Low EFI
P0108 Map Sensor Failed High Carb
P0108 Map Sensor High EFI
P0112 IAT Sensor Voltage Low EFI
P0113 IAT Sensor Voltage Open/High EFI
P0117 ET Sensor Voltage Low EFI
P0118 ET Sensor Voltage Open/High EFI
P0122 TP Sensor Open/Low EFI
P0123 TP Sensor High EFI
P0131 Front 02 sensor low (lean)
P0132 Engine running rich
P0134 Front 02 sensor open/not responding
P0151 Rear 02 sensor low (lean)
P0152 Rear 02 sensor high (rich)
P0154 Rear 02 sensor open/not responding
P0261 Front Injector Open/Low EFI
P0262 Front Injector High EFI
P0263 Rear Injector Open/Low EFI
P0264 Rear Injector High EFI
P0373 CKP Sensor Intermittent Carb
P0373 CKP Sensor Intermittent EFI
P0374 CKP Sensor Not Detected Carb
P0374 CKP Sensor Sync Error EFI
P0501 VSS Low Carb
P0501 VSS Low EFI
P0502 VSS High/Open Carb
P0502 VSS High/Open EFI
P0505 Loss of Idle Speed Control EFI
P0562 Battery Voltage Low Carb
P0562 Battery Voltage Low EFI
P0563 Battery Voltage High Carb
P0563 Battery Voltage High EFI
P0602 Calibration Memory Error Carb
P0603 EEPROM Failure Carb
P0603 ECM EEPROM Error EFI
P0604 RAM Failure Carb
P0605 Program Memory Error Carb
P0605 ECM Flash Error EFI
P0607 Converter Error Carb
P0661 Intake solenoid low/open
P0662 Intake solenoid high/shorted
P1001 System Relay Coil Open/Low EFI
P1002 System relay Coil High/Shorted EFI
P1003 System relay Contacts Open EFI
P1004 System Relay Contacts Closed EFI
P1009 Incorrect Password Carb
P1009 Incorrect Password EFI
P1010 Missing Password Carb
P1010 Missing Password EFI
P1351 Front Ignition Open/Low Carb
P1351 Front Ignition Open/Low EFI
P1352 Front Ignition Coil High/Shorted Carb
P1352 Front Ignition Coil High/Shorted EFI
P1353 Front Cylinder No Combustion EFI
P1354 Rear Ignition Coil Open/Low Carb
P1354 Rear Ignition Coil Open/Low EFI
P1355 Rear Ignition Coil High/Shorted Carb
P1355 Rear Ignition Coil High/Shorted EFI
P1356 Rear Cylinder No Combustion EFI
P1357 Intermittent Secondary Front EFI
P1358 Intermittent Secondary Rear EFI
U1016 Loss of ICM/ECM Serial Data Instruments
U1016 Loss of ECM Serial Data, Vehicle Speed, Vehicle Inhibit Motion or Power train Security Status TSM/TSSM
U1064 Loss of TSM/TSSM Serial Data Carb
U1064 Loss of TSM/TSSM Serial Data EFI
U1064 Loss of TSM/TSSM Serial Data Instruments
U1097 Loss of Speedometer Serial data Carb
U1097 Loss of Speedometer Serial data EFI
U1097 Loss of Speedometer Serial data TSM/TSSM
U1255 Missing Message at Speedometer EFI
U1255 Serial Data Error/Missing Message EFI
U1255 Serial Data Error/Missing Message Instruments
U1255 Serial Data Error/Missing Message TSM/TSSM
U1300 Serial Data Low Carb
U1300 Serial Data Low EFI
U1300 Serial Data Low Instruments
U1300 Serial Data Low TSM/TSSM.
U1301 Serial Data Open/High Carb
U1301 Serial Data Open/High EFI
U1301 Serial Data Open/High Instruments
U1301 Serial Data Open/High TSM/TSSM

Jan 28, 2014 | 2007 Harley Davidson FXSTD Softail Deuce

1 Answer

2008 Harley Davidson DTC codes


P0107 Map Sensor Open/Low
P0108 Map Sensor High
P0117 ET Sensor Low
P0118 ET Sensor High
P0112I AT Voltage Low
P0113I AT Voltage Open/High
P0120 TPS1 Range Error
P0220 TPS2 Range Error
P0122 TPS1 Low
P0123 TPS2 High/Open
P0131 Front Oxygen Sensor Low
P0132 Front Oxygen Sensor High
P0151 Rear Oxygen Sensor Low
P0152 Rear Oxygen Sensor High
P0154 Rear Oxygen Sensor Inactive.
P0222 TPS2 Low
P0223 TPS2 High/Open
P0261 Front Injector Open/Low
P0263 Rear Injector Open/Low
P0262 Front Injector High
P0264 Rear Injector High
P0373 CKP Sensor Intermittent
P0374 CKP Sensor Synch Error
P0444 Purge Solenoid Open/Low
P0445 Purge Solenoid High
P0562 Battery Voltage Low
P0563 Battery Voltage High
P0501 VSS Sensor Low
P0502 VSS Sensor High/Open
P0572 Brake Switch Low
P0577 Cruise Control Input High
P0603 ECM EEPROM Memory Error
P0605 ECM FLASH Memory Error
P06415 V+Vref 1 Out Of Range
P06515 V+Vref 2 Out Of Range
P1001 System Relay Coil Open/Low
P1002 System Relay Coil High/Shorted
P1003 System relay contacts open
P1004 System Relay Contacts Closed
P1009 Incorrect Password
P1010 Missing Password
P1270 TGS Validation Error
P1351 Front Ignition Coil Driver Open/Low
P1352 Front Ignition Coil Driver High/Shorted
P1353 Front Cylinder No Combustion
P1354 Rear Ignition Coil Driver Open/Low
P1355 Rear Ignition Coil Driver High/Shorted
P1356 Rear Cylinder No Combustion
P1357 Front Cylinder Combustion Intermittent
P1358 Rear Cylinder Combustion Intermittent
P1475 Exhaust Actuation Position Error
P1477 Exhaust Actuator Open/Low
P1478 Exhaust Actuator Shorted/High
P1501 Jiffy Stand Sensor Low
P1502 Jiffy Stand Sensor High P1510 EFI Limited
Performance Mode
P1511 EFI Power Management Mode
P1512 EFI Forced Idle Mode
P1514 Air Flow Fault
P1600 EFI Module Processor Internal Error
P2100 EFI Motor Circuit Open
P2101 EFI Motor Circuit Range Performance (Actuation
Error)
P2102 EFI Motor Circuit Low
P2103 EFI Motor Circuit High
P2105 EFI Forced engine shutdown
P2107 EFI Module Processor Internal Fault
P2119 EFI Motor Throttle Body Range Performance
P2122 TGS1 Low/Open
P2123 TGS1 High
P2127 TGS2 Low/Open
P2128 TGS2 High
P2135 TPS Correlation Error
P2138 TGS Correlation Error (Twist grip sensor)
P2176 EFI Closed Position Not Learned
U Codes
U1016 Loss of ECM Serial Data
U1064 Loss of TSM/FSFM Serial Data to ECM
U1097 Loss of Speedometer Serial Data to ECM
U1255 Serial Data Error
U1300 Serial Data Low
U1301 Serial Data High
Harley Davidson 2008 DTC Code Reading (draft)
Harley Davidson DTC Codes - Unofficial Guide Page 3
B Codes
B0563 Battery Voltage High.
B1121(TSM) Left Turn Output Fault
B1121(HFSM) Left Turn Output Open
B1122(TSM) Right Turn Output Fault
B1122(HFSM) Right Turn Output Open
B1123(HFSM) Left Turn Output Short to Ground
B1124(HFSM) Right Turn Output Short to Ground
B1125(HFSM) Left Turn Output Short to Battery
B1126(HFSM) Right Turn Output Short to Battery
B1131(HFSM) Alarm Output Low
B1132(HFSM) Alarm Output High
B1134 Starter Output High
B1135 Accelerometer Failed
B1136(HFSM) Accelerometer Tip Test Error
B1141(TSM) Ignition Switch Low/Open
B1141(HFSM) Ignition Switch Low/Open
B1142 Smart Security System Internal Fault
B1143(HFSM) Security Antenna Short to Ground
B1144(HFSM) Security Antenna Short to Battery
B1145(HFSM) Security Antenna Open
B1151 Bank Angle Sensor(BAS) Short to Ground
B1152 Bank Angle Sensor(BAS) Short to Battery
B1153 Bank Angle Sensor(BAS) High
B1154 Clutch Switch Input Short to Ground
B1155 Neutral Switch Input Short to Battery

Jan 07, 2012 | Harley Davidson FLHX Street Glide...

1 Answer

OK I'll test you. 1984 Merc 4 hp 2 stroke New impeller.With flushing port open and engine running water pores out. So I know the water pump is working. But. if I put the flushing plug back in and...


Check the galleys near the cylinder head.
Bet you picked up some sea weed or something like that.
I know a trick you can try but don't leave this stuff in to long.
Feed the cooling system about a couple of table spoons of draino.
But be careful not to get any of this **** on you,It will eat just about any rust and any organic matter that might get into contact with it.
It can eat zinc also, so if there is any zinc try the liquid plumber instead.!!!
Hope this solves your probkem.
I think a funnel with a tube near the cylinder head junction will be your best shot with this .
Good luck,Gary

Sep 22, 2011 | Boating

1 Answer

2009 ultra classic / check engine lite stays on / cruise won't set / oil pressure gauge is low at idle but goes over 32 when rev'ed. 12100 miles. killed once and Black smoke seemed to come from air...


Revove power comander& see w/ happens...I have a 09 flh also I installed a TFI fuler.. wow test Engine light being on. That is the sign there is a Code that is stored. This may help you.




Harley iagnostic Codes

To access codes

1- Turn Ignition switch to OFF & Run/Stop switch is to Run.

2- Push odometer reset button in & hold.

3- Turn ignition switch to Ignition and release odometer reset button. Background lighting sould illuminate, speedometer needle should sweep its full range and indicator lamps (battery, security, low fuel, check engine and cruise) should illuminate. The word ¡°diag¡± should then appear.

4 - Push the odometer reset button once and you will see the selection menu "PSSPt" (on mine the ¡°t¡± looks more like a ¡°¨\¡± )with the first P flashing.

5 - Each letter represents an area of the diagnostics module. The module that is flashing is the one you are going to check. To move from one letter (module) to the next, you push the odometer reset button one time. (from P to S to SP to t and back to P, etc.)
P = ECM/ICM (Electronic Control Module [EFI] / Ignition Control Module [Carbureted])
S = TSM/TSSM (Turn Signal/ Turn Signal Security Module)
SP = speedometer
T = tachometer



To get the DTC within an area of diagnostics, push and hold the odometer reset button in for 5 seconds and release. If there are any DTC¡¯s the code will be displayed or the word ¡°none¡± will appear if there are no DTC¡¯s. Push the odometer reset button again to view additional codes if they exist.

1 - Record the codes.

2 - If DTC¡¯s are not to be cleared, Press and release the odometer reset button. Part number of module will be displayed.
NOTE: To determine if a code is current or historic, clear the displayed code by pushing in and holding the odometer reset button ( longer than 5 seconds) until 'clear' comes up. Release the odometer reset button. Turn OFF the ignition switch. Run your bike and shut it down then recheck the DTC¡¯s again by repeating steps 1 to 3 If the code is current it will reappear.

4 ¨C Press and release the odometer reset button to continue to the next module.

5 ¨C Turn Ignition switch to OFF.

On models not equipped with a tachometer "No Rsp" will appear when the tachometer identifier is selected.

"No Rsp" will also appear if the run/off switch is in the off position when doing this procedure.

--------------------------

HFSM = Hands Free Security Module
TSM = Turn signal module

Priority/DTC/Fault condition
1. P0605 ECM FLASH Memory Error
2. P0603 ECM EEPROM Memory Error
3. U1300 ECM Serial Data Low
4. U1301 ECM Serial Data High
5. U1097 Loss of Speedometer Serial Data to ECM
6. U1064 Loss of TSM/FSFM Serial Data to ECM
7. P1003 System relay contacts open
8. P1002 System Relay Coil High/Shorted
9. P1001 System Relay Coil Open/Low
10. P1004 System Relay Contacts Closed
11. P1009 Incorrect Password
12. P1010 Missing Password
13. P06415 V+Vref 1 Out Of Range
14. P06515 V+Vref 2 Out Of Range
15. P0373 CKP Sensor Intermittent
16. P0107 Map Sensor Open/Low
17. P0108 Map Sensor High
18. P0374 CKP Sensor Synch Error
19. P1600 EFI Module Processor Internal Error
20. P1270 TGS Validation Error
21. P2107 EFI Module Processor Internal Fault
22. P2122 TGS1 Low/Open
23. P2123 TGS1 High
24. P2127 TGS2 Low/Open
25. P2128 TGS2 High
26. P2138 TGS Correlation Error (Twist grip sensor)
27. P0120 TPS1 Range Error
28. P0220 TPS2 Range Error
29. P0122 TPS1 Low
30. P0123 TPS2 High/Open
31. P0222 TPS2 Low
32. P0223 TPS2 High/Open
33. P2135 TPS Correlation Error
34. P2119 EFI Motor Throttle Body Range Performance
35. P2100 EFI Motor Circuit Open
36. P2101 EFI Motor Circuit Range Performance (Actuation Error)
37. P2102 EFI Motor Circuit Low
38. P2103 EFI Motor Circuit High
39. P2176 EFI Closed Position Not Learned
40. P1514 Air Flow Fault
41. P2105 EFI Forced engine shutdown
42. P1501 Jiffy Stand Sensor Low
43. P1502 Jiffy Stand Sensor High
44. P0572 Brake Switch Low
45. P0117 ET Sensor Low
46. P0118 ET Sensor High
47. P0112I AT Voltage Low
48. P0113I AT Voltage Open/High
49. P1351 Front Ignition Coil Driver Open/Low
50. P1354 Rear Ignition Coil Driver Open/Low
51. P1352 Front Ignition Coil Driver High/Shorted
52. P1355 Rear Ignition Coil Driver High/Shorted
53. P1357 Front Cylinder Combustion Intermittent
54. P1358 Rear Cylinder Combustion Intermittent
55. P0261 Front Injector Open/Low
56. P0263 Rear Injector Open/Low
57. P0262 Front Injector High
58. P0264 Rear Injector High
59. P0562 Battery Voltage Low
60. P0563 Battery Voltage High
61. P0501 VSS Sensor Low
62. P0502 VSS Sensor High/Open..
63. P1356 Rear Cylinder No C...[Message truncated]

Aug 15, 2011 | 2000 Harley Davidson FLHTCUI Electra Glide...

1 Answer

Weed trimmer wont start, spark plug has spark starting fluid down the cylinder head and re installed plug still doesnt sputter at all. also sprayed starting fluid into carb. no sputter. again it does have...


The timinmg is preset by the permanent keyed slot built into the inside of the flywheel where it mates with the crankshaft. If the key was broken off, you would get No spark because of the nature of the magneto ignition. Your compression is actually pretty low for a 2 stroke. It should run higher like around 90+. Try this. With plug removed, cover plug hole with thumb and give the pull start a real strong pull. It should push your thumb off of the hole. If it doesn't the compression is too low for the engine to run. Scored piston walls, or cylinder walls could be the problem. Again 60PSI is really low. I would remove the jug and check for piston scoring and cylinder scoring. The engine can be easily rebuilt (but not real cost effective).

May 25, 2011 | Homelite Mighty Lite Lawn Trimmer

1 Answer

I have a 2000 Mercury efi saltwater engine 250hp that is using well over a gallon of gas per mile-have changed all filters,high end fuel pump,strator and plugs-it seems to surge some at low speed and tops...


Sounds like a problem with your injector or injector sensors. One of the nice things about the EFI`s are the ability to hook up a diagnostic unit to the motor and then a tech at a merc dealership would be able to tell you exactly which sensor or injector is the problem

Mar 09, 2009 | Boating

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