Black scuff marks on cylinder walls

[mertkajosh]

I believe so. I’ll go pop them off and post a picture

The plugs were put in yesterday so they are new. I’ve only ran them in a tank and muffs. I haven’t had it on the water. So the plugs might not tell us much yet

 

[mertkajosh]

Sounds ok to me , nice steady idle . Dunno but it sounds like its a bit rattley, more noticeable from the port side ,but it could also just be that the exhaust is unmuffled and messing with your microphone.
Giving it a couple of quick revs would tell us a bit too, just to hear how it responds when you give it a handful, and how it returns to idle. .
The real test is when you put it under load .
And the plugs look ok.... so far, load her up

It may sound like that on the port side because the starboard side was covered by the board the engine was sitting on. It always sounds weird on muffs. I was concerned it seemed a bit too shaky but maybe that’s normal

 

[jimmbo]

No Back Pressure, while on the muffs. Running it in a tall Test Tank, or mounted on a boat in the Water, might be more Revealing...

 

[tphoyt]

It needs to be in the water with some back pressure on the exhaust to hear, see and feel the true story. But so far it sounds good from here. Jmo

 

[mertkajosh]

No Back Pressure, while on the muffs. Running it in a tall Test Tank, or mounted on a boat in the Water, might be more Revealing...

Thank you!

 

[mertkajosh]

It needs to be in the water with some back pressure on the exhaust to hear, see and feel the true story. But so far it sounds good from here. Jmo

Thank you!

 

[mertkajosh]

No Back Pressure, while on the muffs. Running it in a tall Test Tank, or mounted on a boat in the Water, might be more Revealing...

Seems a bit shaky to me. Maybe I’m just overthinking something is wrong

 

[mertkajosh]

Seems a bit shaky to me. Maybe I’m just overthinking something is wrong

Smooth with throttle though. I think I’m paranoid after having a motor blow on me last year

 

[jimmbo]

I thought it was pretty smooth for a V4, hardly shook at all.

 

[mertkajosh]

I thought it was pretty smooth for a V4, hardly shook at all.

I’m probably paranoid I’ll stop bothering y’all now hopefully! I’ll let you know how she runs when I get it back on the boat!

 

[Mc Tool]

I’m probably paranoid I’ll stop bothering y’all now hopefully! I’ll let you know how she runs when I get it back on the boat!

I really think that is just 2 stroke idling , they can seem like one pot gives an extra strong firing every now and then . See if you cant find a sound track of a big 2 stroke motoX bike idling or gettin its throttle blipped and you will see what we mean (even a decent sized chainsaw will do it )

 

[tphoyt]

This has reminded me of the first time I operated a 4 stroke. It was durning a storm and a older guy was afraid to go get his boat off the morning and asked me and my friend for some help so my buddy took me out and I hopped on board (well it was more like a bellyflop) I started the motor and didn’t hear or feel it running so I hit the key again. Turns out it was running.
I was so surprised at how smooth it ran.

 

[mertkajosh]

I really think that is just 2 stroke idling , they can seem like one pot gives an extra strong firing every now and then . See if you cant find a sound track of a big 2 stroke motoX bike idling or gettin its throttle blipped and you will see what we mean (even a decent sized chainsaw will do it )

Will do sir thank you!

 

[mertkajosh]

This has reminded me of the first time I operated a 4 stroke. It was durning a storm and a older guy was afraid to go get his boat off the morning and asked me and my friend for some help so my buddy took me out and I hopped on board (well it was more like a bellyflop) I started the motor and didn’t hear or feel it running so I hit the key again. Turns out it was running.
I was so surprised at how smooth it ran.

Yea I think I’m being way too paranoid!!

 

[cyclops222]

If those sparkplugs are only run for 1 day ? The engine needs a GREAT mechanic.

 

[mertkajosh]

If those sparkplugs are only run for 1 day ? The engine needs a GREAT mechanic.

For 5 mins of idling

 

[mertkajosh]

If those sparkplugs are only run for 1 day ? The engine needs a GREAT mechanic.

Motor hasn’t touched water yet. I’ve idled it a few times for less than a few minutes. Plugs will look different under load and ran for a few hours

 

[mertkajosh]

If those sparkplugs are only run for 1 day ? The engine needs a GREAT mechanic.

In short, you shouldn't expect to see significant changes in the appearance or condition of new spark plugs after only 5 minutes of idling.

This is what I’ve read. Everyone else is saying plugs look normal as of now

 

[mertkajosh]

If those sparkplugs are only run for 1 day ? The engine needs a GREAT mechanic.

So “great” mechanic…..what are they suppose to look like???