BOAT ENGINE (MerCruiser GM 305) PROBLEMS!?
Hi, I have a 1983 MerCruiser GM 305 marine engine. The engine wont run right and boat wont even plane out. It was running not great but would plane out and get up to 3100 RPM, then I checked timing with a timing light and it was jumping from 8 BTC to 10 ATC.
So now I got a boat that will get up to 1500 RPM in water. It will run at 4500 RPM in nutral but back fire through carb. Also wont open 4 barrel when in water trying to plane.The carb is a Rochester Q-jet 4 barrel . I have NO POWER
Here is all I did, I rebuilt Carb, new points, new condenser, Cleaned/checked advancing springs, new plugs, new wires, new filters(gas,oil,water separator), belts, did compression check(155psi is all), new timing chain and new distributor cap. On my manifold is says it should run at 4400-4600 RPM in water at WOT and I have only seen it run like that when I first bought it 3 years ago and that only lasted a month or so. I don’t want to have to rebuild engine as I just rebuilt one for my race boat. Also the boat runs great at idle. I don’t think it is the cam, or timing chain as it was running OK while running at the top 3100 I got out of it a few days ago. I want it back to the 4500 RPM it is suppose to be. I need this running soon as this is my charter boat.
Thank you

Technorati Tags: 4400, atc, back fire, belts, boat engine, btc, charter boat, compression check, condenser, gas oil, gm 305, jet 4, new distributor cap, nutral, oil water separator, race boat, rpm, timing chain, timing light, wot

BOAT ENGINE (MerCruiser GM 305) PROBLEMS!?
Hi, I have a 1983 MerCruiser GM 305 marine engine. The engine wont run right and boat wont even plane out. It was running not great but would plane out and get up to 3100 RPM, then I checked timing with a timing light and it was jumping from 8 BTC to 10 ATC.
So now I got a boat that will get up to 1500 RPM in water. It will run at 4500 RPM in nutral but back fire through carb. Also wont open 4 barrel when in water trying to plane.The carb is a Rochester Q-jet 4 barrel . I have NO POWER
Here is all I did, I rebuilt Carb, new points, new condenser, Cleaned/checked advancing springs, new plugs, new wires, new filters(gas,oil,water separator), belts, did compression check(155psi is all), new timing chain and new distributor cap. On my manifold is says it should run at 4400-4600 RPM in water at WOT and I have only seen it run like that when I first bought it 3 years ago and that only lasted a month or so. I don’t want to have to rebuild engine as I just rebuilt one for my race boat. Also the boat runs great at idle. I don’t think it is the cam, or timing chain as it was running OK while running at the top 3100 I got out of it a few days ago. I want it back to the 4500 RPM it is suppose to be. I need this running soon as this is my charter boat.
Thank you
It runs smooth and sounds great at 700-4500 RPM as long as it is in neutral. I fixed the back-fire. I did a advanced "timing tune" and took the springs out of the distributor and ran it and set it then. So fixed the back fire problem. I have not put the springs back in because there are two different sizes in it and I have never found this problem in a car. HELP PLEASE. Can I just go to a auto store and put those in there?

Technorati Tags: 4400, atc, auto store, back fire, boat engine, btc, charter boat, compression check, condenser, fire problem, gas oil, gm 305, jet 4, new distributor cap, nutral, oil water separator, race boat, timing chain, timing light, wot

Hi, I have a 1983 MerCruiser GM 305 marine engine. The engine wont run right and boat wont even plane out. It was running not great but would plane out and get up to 3100 RPM, then I checked timing with a timing light and it was way off thinking, "oh I fix it it must be the problem" well I made it worse and cant get it back to were it was running at 3100 RPM. So now I got a boat that will get up to 1500 RPM. Here is all I did, I rebuilt Carb, new points, new condenser, new plugs, new wires, new filters(gas,oil,water separator), belts, did compression check(155psi is all) and new distributor cap. On my manifold is says it should run at 4400-4600 RPM and I have only seen it run like that when I first bought it 2 years ago and that only lasted a month or so. I don’t want to have to rebuild engine as I just rebuilt one for my race boat. Also the boat misses. I don’t think it is the cam, or timing chain as it was running OK while running at the top 3100 I got out of it a few days ago. I want it back to the 4500 RPM it is suppose to be. I need this running soon as this is my charter boat.
Thank you

Technorati Tags: 4400, belts, charter boat, compression check, condenser, few days, gas oil, gm, gm 305, mercruiser, new distributor cap, oil water separator, race boat, rpm, timing chain, timing light

Hi, I have a 1983 MerCruiser GM 305 marine engine. The engine wont run right and boat wont even plane out. It was running not great but would plane out and get up to 3100 RPM, then I checked timing with a timing light and it was way off thinking, "oh I fix it it must be the problem" well I made it worse and cant get it back to were it was running at 3100 RPM. So now I got a boat that will get up to 1500 RPM. Here is all I did, I rebuilt Carb, new points, new condenser, new plugs, new wires, new filters(gas,oil,water separator), belts, did compression check(155psi is all) and new distributor cap. On my manifold is says it should run at 4400-4600 RPM and I have only seen it run like that when I first bought it 2 years ago and that only lasted a month or so. I don’t want to have to rebuild engine as I just rebuilt one for my race boat. Also the boat misses. I don’t think it is the cam, or timing chain as it was running OK while running at the top 3100 I got out of it a few days ago. I want it back to the 4500 RPM it is suppose to be. I need this running soon as this is my charter boat.
Thank you
I checked the mechanical advance at the distributor

Technorati Tags: 4400, belts, charter boat, compression check, condenser, few days, gas oil, gm, gm 305, mechanical advance, mercruiser, new distributor cap, oil water separator, race boat, rpm, timing chain, timing light

drawing with labels of an oil/water separator filter

Technorati Tags: labels, oil water separator

Basically, anything goes (BUT NO VOLCANOES!) I was thinking something like a mini oil/water separator, or homemade lava lamps, or something, but what??? Help – please include links to "how to" pages
Thanks.

Technorati Tags: lava lamps, oil water separator, volcanoes

For school, I had to make an oil water separator. How can I test the purity of the water output (in terms of how much oil is in it). The only thing I can think of is to find its density and calculate its purity that way (closer it is to density of 1, the more pure it is). Are there any other ways?

Technorati Tags: density, oil water separator, purity, water output

I am a student looking to build an oil water separator for a project, and am thinking I will use the vortex design, but I have a question. How do you get the oil out of it? I understand that the water will go to outside and create a cone, and that the water will thus naturally go down bottom hole while oil will go to center. But how do you remove the oil? Will it simply spill out of cone? Or do I have to put something there to suck it out? And how do I prevent the last of the oil from going down bottom hole when water flow stops? Your help is much appreciated.

Technorati Tags: bottom hole, oil water separator, vortex, vortex design, water flow