Replacement engine spark plugs

ukstu

Seaman
Joined
Nov 25, 2018
Messages
51
Hi all,
Some advice please if you could. I had a new engine fitted last year, all running well.
unfortunately, I cannot find a serial number of the engine anywhere. I have looked in all the places it should be.
whilst the engine was new, it was dressed with parts from the old one that came out.
my question is, as ongoing maintenance, I want to renew the plugs and leads. ( not sure if they were new plugs or not but leads we’re definitely from old engine)
The engine is a 5.7 vortex - replacing a non vortex.
Im happy with what leads to get, but could someone please advise on which plugs I should get please?
Also, is there any other way to ID the engine?
thanks in advance..
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,079
Ayuh,.... Vortec heads take a slightly longer plug,.....
AC Delco MR43LTS are the GM marine replacement plugs,....
 
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