the 130hp or 135hp mercruiser 4 cylinder 3.0L engine, I have one in a 19' bayliner. It's a 2002. At idle the motor sounds like a diesel, like it's really noisy valvetrain. Is this normal for this particular motor?
Reason I ask is I purchased the boat as a salvage last year, everything motor-wise was perfect, just a busted windshield seats. I put about 10 hours on it skiing last year @ 4000 rpms, on the
factory 25-40 oil I'm assuming. Did oil analysis, see below. Engine ran great last year. Put fresh 10w30 oil in it for winter storage, ran it for less than one hour this season then changed oil to redline 10w40. Oil is crystal clear on dipstick now and engine runs great. I plan on doing oil analysis end of this season or at 50hr mark.
So, if the motor isn't supposed to sound like it's been and it's not an internal engine problem nor an oil related problem, what might it be? Timing?
On a side note, the motor stumbles on acceleration all the time from 2000-3000 rpms. And when crusing at 3000-3200 the motor hunts a little- won't stay at a constant rpm. I'm 99% certain it's carburetor related and I've found some stuff on bulletin boards claiming fuel left in carb during boat delivery causing the carb power valve to stick or go bad, or the accelerator pump needs to be adjusted/changed/fixed. Anybody have any experience with this? It's a 2002 Mercruiser 3.0L 4-cyl Alpha1 sterndrive, 135hp.
Thanks.
> Oil Brand/Wt. Mercruiser 25w-40
> Type Equipment: Mercury marine gasoline engine Miles/Hours on Oil: 10
> Total Miles/Hours: 10
> Results Comment
> (ppm/%) (blank = normal)
> Wear
> Copper 20 new break in wear
> Iron 88 combo of break-in wear/intentional damage
from contamination
> Chromium 1 Normal
> Lead 20 break-in wear
> Aluminum 9
> Silicon 152 combo same as Iron, should be below 75ppm
> Tin 33 combo as above
>
> Additives
> Molybdenum 12 ring wear from dirt
> Sodium 107 additive
> Magnesium 710 additive and possible case wear,confirm
magnesium's use in the engine,if not then it is a critical AW/FM additive
> Zinc 900 additive, must find a oil that has a high
level of Zinc or other similar adds
> Potassium 0 Normal
> Phosphorus 784 Normal
> Calcium 474 very low value for acid neutralization
>
> Physical Properties
> Water negative
> Fuel negative
> Antifreeze negative
> Soot 0 NO solids, very good
> Oxidation 29 14.5% good
> Nitration 53 26.5% good
> Sulfur 38 good,normal
> TBN 11 good
> vis@100 C 11.5 30w instead of 40w.
>
Reason I ask is I purchased the boat as a salvage last year, everything motor-wise was perfect, just a busted windshield seats. I put about 10 hours on it skiing last year @ 4000 rpms, on the
factory 25-40 oil I'm assuming. Did oil analysis, see below. Engine ran great last year. Put fresh 10w30 oil in it for winter storage, ran it for less than one hour this season then changed oil to redline 10w40. Oil is crystal clear on dipstick now and engine runs great. I plan on doing oil analysis end of this season or at 50hr mark.
So, if the motor isn't supposed to sound like it's been and it's not an internal engine problem nor an oil related problem, what might it be? Timing?
On a side note, the motor stumbles on acceleration all the time from 2000-3000 rpms. And when crusing at 3000-3200 the motor hunts a little- won't stay at a constant rpm. I'm 99% certain it's carburetor related and I've found some stuff on bulletin boards claiming fuel left in carb during boat delivery causing the carb power valve to stick or go bad, or the accelerator pump needs to be adjusted/changed/fixed. Anybody have any experience with this? It's a 2002 Mercruiser 3.0L 4-cyl Alpha1 sterndrive, 135hp.
Thanks.
> Oil Brand/Wt. Mercruiser 25w-40
> Type Equipment: Mercury marine gasoline engine Miles/Hours on Oil: 10
> Total Miles/Hours: 10
> Results Comment
> (ppm/%) (blank = normal)
> Wear
> Copper 20 new break in wear
> Iron 88 combo of break-in wear/intentional damage
from contamination
> Chromium 1 Normal
> Lead 20 break-in wear
> Aluminum 9
> Silicon 152 combo same as Iron, should be below 75ppm
> Tin 33 combo as above
>
> Additives
> Molybdenum 12 ring wear from dirt
> Sodium 107 additive
> Magnesium 710 additive and possible case wear,confirm
magnesium's use in the engine,if not then it is a critical AW/FM additive
> Zinc 900 additive, must find a oil that has a high
level of Zinc or other similar adds
> Potassium 0 Normal
> Phosphorus 784 Normal
> Calcium 474 very low value for acid neutralization
>
> Physical Properties
> Water negative
> Fuel negative
> Antifreeze negative
> Soot 0 NO solids, very good
> Oxidation 29 14.5% good
> Nitration 53 26.5% good
> Sulfur 38 good,normal
> TBN 11 good
> vis@100 C 11.5 30w instead of 40w.
>