| Author |
Message |
    
trevor barnett
New member
Username: trevortab
Post Number: 1
Registered: 05-2008
| | Posted on Wednesday, May 14, 2008 - 01:14 pm: | 
|
ive got 2 cyl merc 40h that wont start ive replaced the coils and the switchbox on the front of the motor and filed the points it turns over but there is no spark its getting fuel and the mixture is right as far a i know its mixed at 50:1 so can anyone help me |
JB
Advanced Member
Username: beckerjs
Post Number: 965
Registered: 11-2005
| | Posted on Wednesday, May 14, 2008 - 01:26 pm: |
|
an 80-83 doesn't have points, best post a serial number |
trevor barnett
New member
Username: trevortab
Post Number: 2
Registered: 05-2008
| | Posted on Wednesday, May 14, 2008 - 07:07 pm: |
|
the serial # is 6140840 |
'Bandit
Advanced Member
Username: timebandit
Post Number: 332
Registered: 09-2007
| | Posted on Wednesday, May 14, 2008 - 08:01 pm: |
|
Find the black/yellow wire and unplug it. |
JB
Advanced Member
Username: beckerjs
Post Number: 973
Registered: 11-2005
| | Posted on Thursday, May 15, 2008 - 09:04 am: |
|
Bandit wants you to pull the b/y wire grounding the ign, this wire is the one on the switchbox that goes to the key switch. when pulled there will be no way to shut the motor off, use the choke. Your engine is a 1982. Have you checked the trigger and stator yet? |
trevor barnett
New member
Username: trevortab
Post Number: 3
Registered: 05-2008
| | Posted on Thursday, May 15, 2008 - 11:56 am: |
|
i havent checked the stator or trigger. how do i do that? i tried the pulling to b/y wire off the switch box and it didnt work. i checked the timing and it seems to be that it is off around 50deg, or atleast the marks on the fly wheel and top dead center of the top piston which i think is #1 which i dont know im just guessing because its easiest to get to. |
JB
Advanced Member
Username: beckerjs
Post Number: 974
Registered: 11-2005
| | Posted on Thursday, May 15, 2008 - 12:18 pm: |
|
top cyl is number 1, if its 50 degrees off you might have sheered the key in the flywheel, yourspark would be messed up.
trigger test= disconect leads, test between br/yl and br/wh= 650-850 ohms
stator test= disconect leads, test leads between
bl/wh and grd= 120-180
bl/y and grd=3200-3800
bl/y and bl/w=3100-3700
the stator and trigger are under the flywheel, it must be removed to replace either one.
The flywheel can be removed with a steering wheel puller bolted to the flywheel (no jaws). It should be bolted to the 2 screws with the lock washers under the head, the ones around the center.
http://www.marinepartsman.com/ bottom left for help
would you like to tell me what points you filed? |
trevor barnett
Member
Username: trevortab
Post Number: 4
Registered: 05-2008
| | Posted on Thursday, May 15, 2008 - 02:05 pm: |
|
well i guess what we thought were the points was the stator and it was really rusty so we took the rust off timming is back to were it is closer still not sure if it is right but i know its close its set to about 6deg above tdc and thanks ill give that a try |
JB
Advanced Member
Username: beckerjs
Post Number: 976
Registered: 11-2005
| | Posted on Thursday, May 15, 2008 - 02:44 pm: |
|
 the stator is at the bottom, the trigger is at the middle/right, the charging circuit is above. your charge and stator might be combined as one unit.On the left is the mercury (tilt) switch, it grounds out the ign if the engine is tilted. Something else to remove if you are having troubles. But since you disconected the bl/yl wire on the switch, its not the problem.
Graham, look at that pic |
trevor barnett
Member
Username: trevortab
Post Number: 5
Registered: 05-2008
| | Posted on Thursday, May 15, 2008 - 05:10 pm: |
|
ok ive got another question i have red/blk wire comming from a wire buldle that isnt hooked up to anything where would it go its on the left hand side right before the oil seperator or i believe thats what it is maybe a fuel filter of some sort but the fuel line hooks up to it |
JB
Advanced Member
Username: beckerjs
Post Number: 979
Registered: 11-2005
| | Posted on Friday, May 16, 2008 - 09:18 am: |
|
the red wire goes to the rectifier, its for charging the battery and running lights, should be hooked to a 20amp fuse if I remember correctly. The rectifier sometimes can short out the stator if its bad. I beleive disconecting the yellow wire will test that. Hooking the battery up backwards also causes damage. Perhaps a manual is in order |
