Hi,
I can't seem to get above about 3600 RPMs. I have a 2003 Monterey Montura 200LS with a Mercruiser 5.0L MPI engine, Aplha One Gen II. I've replaced the fuel/water filter. When I looked at the parts catalog online there's a second filter shown, which looks like an automotive style filter but I can't find it. I have a new prop as well, was going to get one anyway so I ruled out a problem with the current prop.
I am trying to see what else I need to do, but in the mean time I have a question. I replaced a failed IAC about a week before this RPM loss started with an aftermarket IAC. I understand the IAC has to do with idle, but could it also affect top end RPMs? Just curious if I caused the issue by using a non mercury part. This is my first boat, done plenty with jetskis, but this is a whole new world for me.
I am going to pull the plugs tomorrow and check them out as well as the distributor cap and rotor.
I can jump right to 5000 RPMs in neutral. If I try to start quickly I get to about 2800 RPMs and she climbs slowly on plane, then once on plane I can slowly get to 3600 RPMs and if I mess with trim, I can squeeze a couple hundred more depending on water conditions.
Hoping some folks here will have some thoughts as well.
Thank You,
-Eric
I can't seem to get above about 3600 RPMs. I have a 2003 Monterey Montura 200LS with a Mercruiser 5.0L MPI engine, Aplha One Gen II. I've replaced the fuel/water filter. When I looked at the parts catalog online there's a second filter shown, which looks like an automotive style filter but I can't find it. I have a new prop as well, was going to get one anyway so I ruled out a problem with the current prop.
I am trying to see what else I need to do, but in the mean time I have a question. I replaced a failed IAC about a week before this RPM loss started with an aftermarket IAC. I understand the IAC has to do with idle, but could it also affect top end RPMs? Just curious if I caused the issue by using a non mercury part. This is my first boat, done plenty with jetskis, but this is a whole new world for me.
I am going to pull the plugs tomorrow and check them out as well as the distributor cap and rotor.
I can jump right to 5000 RPMs in neutral. If I try to start quickly I get to about 2800 RPMs and she climbs slowly on plane, then once on plane I can slowly get to 3600 RPMs and if I mess with trim, I can squeeze a couple hundred more depending on water conditions.
Hoping some folks here will have some thoughts as well.
Thank You,
-Eric
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