1998 Mercruiser 7.4 L EFI Timing
05-16-2007 | 10:14 AM
#3
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Joined: Jan 2005
Posts: 573
Likes: 1
From: Newport Beach,CA
You can do it and it's easy. Assuming your '98 is MEFI 2 or 3, with the engine idling, you put a jumper (small paperclip works well) between terminals "A" and "B" on the DLC (Data Link Connector). That puts it in BaseTiming Mode. Then set timing with a timing light.
Just in case, if the engine does not rev up when you put the jumper in but instead dies, you may have a MEFI 1 system in which case you would need to run the engne up to about 1600RPM before you put the jumper in.
Dave
Just in case, if the engine does not rev up when you put the jumper in but instead dies, you may have a MEFI 1 system in which case you would need to run the engne up to about 1600RPM before you put the jumper in.
Dave
05-16-2007 | 04:17 PM
#4
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Joined: Aug 2002
Posts: 5,658
Likes: 1
From: IL
You can do it and it's easy. Assuming your '98 is MEFI 2 or 3, with the engine idling, you put a jumper (small paperclip works well) between terminals "A" and "B" on the DLC (Data Link Connector). That puts it in BaseTiming Mode. Then set timing with a timing light.
Just in case, if the engine does not rev up when you put the jumper in but instead dies, you may have a MEFI 1 system in which case you would need to run the engne up to about 1600RPM before you put the jumper in.
Dave
Just in case, if the engine does not rev up when you put the jumper in but instead dies, you may have a MEFI 1 system in which case you would need to run the engne up to about 1600RPM before you put the jumper in.
Dave
05-16-2007 | 05:10 PM
#5
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Joined: Dec 2001
Posts: 809
Likes: 0
From: Rapid City SD
You can do it and it's easy. Assuming your '98 is MEFI 2 or 3, with the engine idling, you put a jumper (small paperclip works well) between terminals "A" and "B" on the DLC (Data Link Connector). That puts it in BaseTiming Mode. Then set timing with a timing light.
Just in case, if the engine does not rev up when you put the jumper in but instead dies, you may have a MEFI 1 system in which case you would need to run the engne up to about 1600RPM before you put the jumper in.
Dave
Just in case, if the engine does not rev up when you put the jumper in but instead dies, you may have a MEFI 1 system in which case you would need to run the engne up to about 1600RPM before you put the jumper in.
Dave
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