Cyl 3 spark plug came appart.

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09-22-2023 | 10:28 AM

#41

JaniH

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Joined: Jan 2009

Posts: 682

Likes: 177

From: Finland

Quote:

Originally Posted by dbkski

The Swedish 7.4L engine mod thread by "jocke" got me thinking about Jani and his engine ordeal.
I can't believe everyone missed or ignored this post.
Jani - What is this picture? Another blown out spark plug issue like last year?
Is your boat up and running?

Hi, that picture is from Last year. Switched to ngk br6fs plugs, and no problems after. This happened 3 times to a fellow here In my town
with mr43t plug, he also switched to ngk and no problems after. Really like the engine, feels powerfull and torque is strong at any given rpm until 5300rpm. Fuel consumption is also suprisingly low.

09-22-2023 | 05:25 PM

#42

BadDog

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Joined: Nov 2000

Posts: 1,418

Likes: 20

From: Westport, Kentucky

Apples to Bananas but something to be aware of. YouTube on how to spot them but there are a lot of counterfeit plugs around. This was a problem with some of the higher dollar Iridium plugs my dirt bike uses. My research stopped there but be aware. I can see them creating havoc on an otherwise healthy engine.