carb help on mercury xr6 150

[dogmam]

Hi i have a question about my motor I rebuilt the carbs and put in new carbon fiber reed valves from CCMS i was having idle problems now when I unplug spark plugs 2,4,6 and start the motor it runs fine and i can adjust the idle screw but when i unplug 1,3,5 and have 2,4,6 plugged up its hard to start and the motor won't stay running what could be my problem

 

[jimmbo]

Could be Carbs, could be Ignition, could be Compression
Is it in the Water, or is it on the Muffs? A V6 can run on the Muffs just fine, with 1/2 the Cylinders not firing.
Being that their are 2 separate Ignition Systems on that motor, and it appears that the Odd Cylinders appear to be firing, and the Even Cylinders can't keep the Motor running, I suspect one of the Switchboxes may be bad.
How long have you owned this Motor?

 

[dogmam]

Could be Carbs, could be Ignition, could be Compression
Is it in the Water, or is it on the Muffs? A V6 can run on the Muffs just fine, with 1/2 the Cylinders not firing.
Being that their are 2 separate Ignition Systems on that motor, and it appears that the Odd Cylinders appear to be firing, and the Even Cylinders can't keep the Motor running, I suspect one of the Switchboxes may be bad.
How long have you owned this Motor?

I just got it in March the guy i got it from said he only had it out a few times the boat is like new it runs good at wot I did the testing on muffs not on the water

 

[dogmam]

I just got it in March the guy i got it from said he only had it out a few times the boat is like new it runs good at wot I did the testing on muffs not on the water

I took the coil packs off the bad side and put them on the other side they ran fine

 

[jimmbo]

I just got it in March the guy i got it from said he only had it out a few times the boat is like new it runs good at wot I did the testing on muffs not on the water.

Yeah, pretty much every used Engine runs like new when it is being sold...

I took the coil packs off the bad side and put them on the other side they ran fine

So you took the Coils from 2, 4, and 6, and put them on 1, 3, and 5, and the Motor ran on 1, 3, and 5?
If so, that shows the Problem on 2, 4, and 6 is Upstream of the Coils.

Have you checked for Spark using an Adjustable Spark Tester? All Cylinders should have a Spark strong enough to jump a 3/8" Gap



If some don't have spark, you could have a Damaged/Shorted Wire going to the Switchbox, or the Switchbox is bad.

Here is a Link to a Ignition System Service Guide

CDI Electronics - Practical Outboard Ignition Troubleshooting Guide (8th Edition)

Practical Outboard Ignition Troubleshooting Guide | CDI Electronics - 8th Edition | Detailed reference manual that includes troubleshooting tips, reference data for troubleshooting outboard ignitions,

issuu.com

 

[dogmam]

Yeah, pretty much every used Engine runs like new when it is being sold...


So you took the Coils from 2, 4, and 6, and put them on 1, 3, and 5, and the Motor ran on 1, 3, and 5?
If so, that shows the Problem on 2, 4, and 6 is Upstream of the Coils.

Have you checked for Spark using an Adjustable Spark Tester? All Cylinders should have a Spark strong enough to jump a 3/8" Gap

View attachment 416409

If some don't have spark, you could have a Damaged/Shorted Wire going to the Switchbox, or the Switchbox is bad.

Here is a Link to a Ignition System Service Guide

CDI Electronics - Practical Outboard Ignition Troubleshooting Guide (8th Edition)

Practical Outboard Ignition Troubleshooting Guide | CDI Electronics - 8th Edition | Detailed reference manual that includes troubleshooting tips, reference data for troubleshooting outboard ignitions,

issuu.com

i will get one and check it do you think it could be my ignition controller that might be going bad

 

[Dukedog]

what year XR6?.. makes a difference with type of 'lectrics.... pre 2000 it has a switch box ignition.. after it will be a cdm type ignition...

send me an email addy and i'll send ya an oem manual for it....

 

[dogmam]

what year XR6?.. makes a difference with type of 'lectrics.... pre 2000 it has a switch box ignition.. after it will be a cdm type ignition...

send me an email addy and i'll send ya an oem manual for it....

It's a 2002 whats your email

 

[dogmam]

It's a 2002 my email is est9fp@yahoo.com

 

[jimmbo]

You should do PMs when discussing e-mail Addresses

 

[dogmam]

You should do PMs when discussing e-mail Addresses

sorry