Plug indexing- rule of thumb???

[woody912]

Just changed plugs for the first time, read the chart about 20 times and still as nervous as a sportin' woman in church. Is this a legit rule of thumb???

Port side- gap should face between 3:00 and 6:00
Starboard " " " " 6:00 and 9:00 ????

For all you wisea$$es, I guess I mean P.M.
If U wonder why I don't take it to local dealer, he just got me $20 for a qt of Seaster steering fluid and he's planting corn, probably get my boat in August

[Danrude]

Both Port and Starbord, if the injector is 6:00 it will work between 3:00 and 9:00. Yes! that is the correct plug. According to the chart on the DI it is .030. I think the gap changes to .028 if you are installing the hotter thermostats from the E-Tec. I will let the Gurus fill you in on that.

[Bassmeister]

Either plug on the DI or E-TEC .028

[SEAHORSE]

Actually with the motor vertical and facing the port sparkplugs, the gap should be between the 12:00 and 6:00 position with 3:00 facing directly at the injector tip.

On the stbl. side it should also be between the 6:00 and 12:00 position but the 9:00 would be facing the injector.

[woody912]

Is there any desire to have them face directly at the injector? The previous set were all indexed in the lower quadrants and based on the pic in the one stop shopping I took it that this was area C ( I think) I'm certain I am good, just trying to come up with something I could remember if I ever got in a bind and had to replace one out in the boonies.

[woody912]

Dan see Seahorses post below, might want to check what you posted, I think it is not correct. Might want to check your plugs after you read that?

BTW thank you to everyone for all the help. I ran this set of plugs 2 years, 2000 acres is a big lake around here so I thought it would be ok. I think my old set was gapped about .080"!!!!! Motor still ran fine but learned a lesson for sure

[Bassmeister]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by woody912 &raquo;</TD></TR><TR><TD CLASS="quote">Dan see Seahorses post below, might want to check what you posted, I think it is not correct. Might want to check your plugs after you read that?

BTW thank you to everyone for all the help. I ran this set of plugs 2 years, 2000 acres is a big lake around here so I thought it would be ok. I think my old set was gapped about .080"!!!!! Motor still ran fine but learned a lesson for sure</TD></TR></TABLE>
.080!!!! Dang!!! Mine wanted to die out when cold anything above .035 'specially when shifting gears!!

[Danrude]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by woody912 &raquo;</TD></TR><TR><TD CLASS="quote">Dan see Seahorses post below, might want to check what you posted, I think it is not correct. Might want to check your plugs after you read that?</TD></TR></TABLE>

Either way you look at it it is 90 degrees either side of the center of the injector.

[woody912]

agreed, I did not understand your reference to the injector being at 6:00 though if you are looking at them from straight behind the motor??

[JR19]

Here is a link on how to do the job plus pictures.

The picture at the bottom of the page will show you where the gap needs to be

http://www.boatsetup.com/PlgIndex.pdf

[woody912]

yea, I had read all that and the pic etc, seemed to indicate there was about a 90 degree acceptable range for the gap to be in but seems like most guys are saying that zone A is also OK which makes it about 180 degrees. just trying to get a little better clarification .

[SEAHORSE]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by woody912 &raquo;</TD></TR><TR><TD CLASS="quote">yea, I had read all that and the pic etc, seemed to indicate there was about a 90 degree acceptable range for the gap to be in but seems like most guys are saying that zone A is also OK which makes it about 180 degrees. just trying to get a little better clarification .</TD></TR></TABLE>


Zone A plus Zone B equals a bit more than 180°, but we use 180°, which is 90° on each side of the injector, as a rule of thumb for simplicity.