Should I splurge on platinum plugs?

[GAAHTH]

Hi All,

Can't remember the last time I change the plugs in my 2002 Response.  It looks like the last time I had them changed (maybe 10 years ago) my now-retired mechanic used ACD MR43LTS, and maybe those are showing signs of age.   Found a box in my garage that had 8 old ACD 41-932 iridum, now replaced by ACD 192560 (tough to tell on the amazon pic if that is the full #) but $19 US a pop!  A box of 8 of the regular MR43LTS marine plugs was under $30!   Any advantage if just occasional wakeboarding, slalom, and tubing for the short new england season to the premum?  thanks in advance for any insight! 

[oldjeep]

If the MR43LTS was working - why spend extra money?  And if you already have a box of the iridiums - why spend anything?

Edited April 3 by oldjeep

[BlindSquirrel]

No reason to get "marine" spark plugs for that motor. Those MR43LTS plugs, that came on it when new, can be had for less than $16 for a set on rock auto.

https://www.rockauto.com/en/moreinfo.php?pk=673320&cc=0&pt=7212&jsn=3

Here is a good read during your toilet time on spark plugs.

https://www.marineenginedigest.com/diy/sparkplugsavvy.htm#:~:text=Per se%2C other than corrosion,a few of the essentials.

[formulaben]

I could be totally wrong here, but I thought someone posted a very good reason why you're not supposed to use Iridium plugs on the older Indmars.  I really wish I could remember, but I think it had something to do with the lower compression and temperature of the plug...anyway, I only used the ACD MR43LTS plugs on my 2002 and never had an issue with them.