New mercury Break in? Rev limiter???

[home made tunnel]

2017 Pro XS 115hp

So took the new tunnel out yesterday, and the motor won't rev past 4K rpm. Even trying to get on plane, if I floor it, it should POP out of the water. It almost feels like it's in limp mode. In neutral, it doesn't rev past 4K either.

If this was a bigger boat, the lack of power would t let it get on plane at all.

Searching through the internet, I know the breaking needs varying rpm, and occasional full throttle... but it just doesn't fee right.


Does the computer put out a limiter on it until a certain amount of hours ?

[Capt.Insane-o]

Congratulations on your first abusive over rev code ;)

[JBS]

Congratulations on your first abusive over rev code ;)
Had a similar issue with my motor.Turned out I needed a 1000 amp battery.

[rastadr]

now you know why people get so much money for their decade + older 280's and 300x's.

[baja200merk]

The dealer just told a friend his new rude broke a reed due to being too close to the redline :eek:. Meanwhile we turn the same reeds 7500 and they had 1250 hrs on them :confused:. Turns out a rigging screwup took out a reed. They will do anything to get out of a warranty claim.

[FMP]

could be break in mode ? will respond with a few hrs?

[home made tunnel]

maybe breakin mode... no idea. But had this been a bigger boat, NO way the tiny bit of power I'm at would make it plane. I barely got this to plane.

[home made tunnel]

Congratulations on your first abusive over rev code ;)

cant be... wouldn't even over rev haha

[XstreamVking]

Sumptin don't sound right. What pitch prop again? BTW DON'T rev it to 4k in neutral... Check the throttle for full travel 1st...

[FMP]

That could be, did you go foot throttle and home made shifter?

[RSWORDS]

2017 Pro XS 115hp

So took the new tunnel out yesterday, and the motor won't rev past 4K rpm. Even trying to get on plane, if I floor it, it should POP out of the water. It almost feels like it's in limp mode. In neutral, it doesn't rev past 4K either.

If this was a bigger boat, the lack of power would t let it get on plane at all.

Searching through the internet, I know the breaking needs varying rpm, and occasional full throttle... but it just doesn't fee right.


Does the computer put out a limiter on it until a certain amount of hours ?

No it does not. You have 100% of available power from the get go.

You have another issue. If no alarm it's not goin into limp mode. I'd guess prop size or not getting full throttle.

There is a lower Rev limiter for neutral, and I HAVE seen the switch go bad and the computer thinks it's in N still (fixed one today actually)

[FMP]

This motor comes with a display, will it not show a code? No packaging in the air box intake or something stupid like that?

[RSWORDS]

The dealer just told a friend his new rude broke a reed due to being too close to the redline :eek:. Meanwhile we turn the same reeds 7500 and they had 1250 hrs on them :confused:. Turns out a rigging screwup took out a reed. They will do anything to get out of a warranty claim.

That's so screwed up. I've seen Mercury warranty some of the dumbest not their fault things ever with no issue.

And one of the PDI requirements on a new engine is WOT RPM and making sure it falls in spec.

[RSWORDS]

And that motor doesn't even start to start pulling hard till 4300 or so.

[home made tunnel]

26 pitch prop. Vesse view 4, and shows no codes. I'll check the full throttle from the hot foot in the morning. It has a tps sensor too... not sure if it has a neutral sensor. I think just a neutral safety switch.... that I have plugged into itself (no switch currently). Hmmmmmm maybe that's why... after starting, ill unplug that switch and see if I have full power...

[FMP]

You'll find it. Maybe when you weren't looking your resident rodents setup house in the air box,lol. You leave a plug wire off?

[vnemous]

Just a thought, that motor comes with a yellow cap where the flywheel bolts on. Have seen them come loose and wind up in the intake.

[home made tunnel]

The Intake has a screen over it sealed by a rubber boot. Like it's meant to keep critters out. I'm positive nothing's in there.

Im leaning towards the two-wire lead for the neutral safety switch. I don't have one, so I just plugged them into each other so the motor would start. Guessing it thinks it's still in neutral when I floor it in gear?

[Krazymaan]

Just curious but what is the rev limit on that 4 stroke motor suppose to be?

[Wayne Cammidge]

There is a fault somewhere.
Could be the shift switch, but would alarm would come on.
By the way, is this an Opti or a 4 stroke?
Otherwise you have either a faulty , coil, spark plug, injector, un linked throttle sensor, some thing like that.
Get it on a computer, quickest way to find the issue, especially with someone that knows what to look for.

[XstreamVking]

It's a 4 stroke. I bet it's something simple, he will figure it out..

[Wayne Cammidge]

Fuel supply issues??

[Euroski]

Did U read the owners manual?:)

[FMP]

Birdcage
Getting wot
Narrow it down

[Li'l Toy]

Did U read the owners manual?:)

When all else fails, read the directions.....

[RSWORDS]

Just curious but what is the rev limit on that 4 stroke motor suppose to be?

6300 is Max WOT, limiter kicks in around 6400ish

[roadkill636]

[QUOTE=XstreamVking;296685 BTW DON'T rev it to 4k in neutral[/QUOTE]


:eek:

[Krazymaan]

I'm not into 4 strokes yet, but thats some good rpms

[RSWORDS]

I'm not into 4 strokes yet, but thats some good rpms

The 400r is good for 7,000

[Krazymaan]

The 400r is good for 7,000
My 2.5 is good for 11k. But thats a lot or R'z for a 4 stroke.