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Old 04-02-2016, 12:31 PM
98Prostar205 98Prostar205 is offline
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Boat: 1998 Prostar 205
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are these the right spark plugs???

So i ordered new wires, cap, rotor and plugs for my 98 prostar205. Compared the new and old plugs and the new ones are significantly longer. Are these new plugs the right ones? Im thinking they arent but i thought i would check here first before i contact skidim on Monday.
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  #2  
Old 04-02-2016, 12:47 PM
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Rocketboy Rocketboy is offline
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I would not put those in!
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Old 04-02-2016, 01:26 PM
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thatsmrmastercraft thatsmrmastercraft is offline
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Me either. Look them up - maybe you had the wrong plugs in?
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  #4  
Old 04-02-2016, 01:46 PM
98Prostar205 98Prostar205 is offline
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Where can i look to find out?
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Old 04-02-2016, 01:51 PM
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Quote:
Originally Posted by 98Prostar205 View Post
Where can i look to find out?
Which engine do you have? The LT-1 used AC MR43LTS and the TBI used MR-43T. The BR6FS is the NGK equivalent to the MR43T, but it wasn't the OEM plug, which is still available. The Vortec engines used MR-43LTS, too. The TR5 is the equivalent to the MR43LTS.

I used Borg Warner Gold caps & rotors because they worked better/lasted longer than some of the others and came with a lifetime warranty. Some plug wires come with lifetime warranty, too.

No user manual for the boat, eh? MC has this info, too.
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Old 04-02-2016, 01:53 PM
98Prostar205 98Prostar205 is offline
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I have the TBI.
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Old 04-02-2016, 02:01 PM
98Prostar205 98Prostar205 is offline
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Here are the plugs skidim sent me
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Old 04-02-2016, 02:31 PM
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Quote:
Originally Posted by 98Prostar205 View Post
I have the TBI.
Look at the heads of the bolts that hold the intake manifold on- if they're angled into the mating surface of the head/intake manifold, it's NOT a Vortec engine and needs the MR-43T.
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Old 04-03-2016, 05:12 PM
98Prostar205 98Prostar205 is offline
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The bolts holding the head to the block and the intake to the heads/block ate perpendicular to the block. I believe its a vortec. So based on that info, the longer TR5 pligs are what i need right???
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Old 04-03-2016, 06:53 PM
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Reassure yourself before you use the longer plugs, take a wire with a right angle hook on the end and measure the depth of the threaded bore.
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