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hey Beer thirty---Since I adjusted the IAC I have started it up 5 times and it starts without me touching the throttle and the engine sits there and idles. I have not taken it out yet on the water. I will listen for the IAC to adjust like you said. Thank you art

I never called anybody over the phone. Like I said the 1 place I took my boat into them. the other guy was a mobil marine mechanic that came out to my boat. He was checking the coolers for being plugged. He kept doing the same thing. Pushing the throttle to start it. He was the one that said the...

I had the boat into the one place that looked at it while changing the impeller. they never said anything about the iac. Yeah they knew it was an MPI. WOW! I own a business also. the next time I have a customer call me to ask me a question I guess I will just tell them I don't give out free...

I have been having trouble starting my mercruiser 7.4L mpi. I would have to give it throttle before it would start and stay running. I have ask 4 different mechanics why the engine is doing that. I have had 3 different answers. 1 said to adjust my throttle cable going to trottle body. This guy...

2007amberjack---Have you ever shot your elbows on your 6.2L with an ir gun while on cruise? if so, what temp did you get on top where the exhaust is flowing? I shot mine and got 205 and this is suppose to be normal with big blocks. art

I have had this same issue with my merc 7.4 mpi It was overheating after I had an annual done. The engine was overheating. i have changed thermostat, temp sending unit, checked the elbows and risers. they are only 2 years old and used very little. Impeller was changed but the mechanic did not...

hey douglee25---There were grooves in the old plastic housing when the place I took the boat to checked it out. It was at a certified mercruiser place. They said they will not change impeller without changing the plastic housing. they found in the past the water will travel around the blades...

hey guys---They found the impeller housing bad. It had grooves in it. they said that will let water flow around the blades on the new impeller and engine will overheat. They said the other mechanic should have replaced it when he installed new impeller. Also, they said it was normal for the big...

well guys, I gave up and took my boat into the local Sea Ray dealer today. They are going to check it out tomorrow to see what is wrong with it overheating. i will let you know what I find out. art

I had a guy detail my boat after I bought it. he used the Meguiars liquid compound. It did a great job and left hardly any swirl marks. It brought the fiberglass back to new condition. Then I put 3 coats of polish on it after he got done. art

Hey Doug---I wish i could, but I want to make sure it is done right. There is a lot of things that have to come off before taking intake manifold off and then to the heads. I just want someone that is certified with the Mercrusier 7.4 mpi engine. I sure don't want the same problem as I have now...

Hey Ron-- There is no way he can deny not doing it. I have the invoice where he states he took off risers and inspected and replaced with new gaskets. As soon as I took off the risers and saw the gasket he put on I took pictures of it. I also have a witness that saw the gasket. I also saved all...

Hey Ron---You are right about the gaskets in the picture you posted. It was suppose to be the open gasket and not the restrictor. I am sure this stopped a lot of water from passing through the elbows. This had to build up a lot of pressure inside engine with a lot of heat. Thanks art

Hey Doug--I have checked about everything you have mentioned. I did a head gasket test today. I installed clear hoses from thermostat to bottom of manifolds. There are a lot of air bubbles in the water. This indicates a blown head gasket. That is why I overheat in about 5 minutes on cruise. Now...

hey guys---I am afriad I might have major problems. I have checked everything out but I overheat within 5 minutes getting up on cruise. I might have a blown head gasket. I am going to do a test using a clear hose going from the thermostat to the bottom of manifold. If there is bubbles in the...

hey doug---I feel the same way. Before I back flushed the amount of water was less coming out. There is nothing in my coolers. All three of them are free of any pieces. If there was a piece of impeller it would have to be in one of the hoses. I will be taking the boat out again tomorrow to see...

hey Doug---What I meant was when I back flushed the hoses and coolers I never saw any pieces of the impeller come out. Water was flowing. After putting all back together I ran the boat using muffs and this time more water was flowing out the back of exhaust then before. Before I did this water...

Hey Ron---I know it is overheating because I have shot the engine with the ir gun. My alarm has gone off 2 times. I checked the risers at that point and they were 207 degrees. I back flushed all the coolers and hoses today. I did not see anything come out, but after doing this there is a lot...

hey Ron---I changed the gasket. Took it out and still runs hot on cruise. That is why I am wondering did the wrong gasket blocking water flow has caused any damage to my engine? thanks art

could raw water intake in the outdrive get clogged up? I have checked everything like impeller, all the coolers and the exhaust flappers and everything is ok, but I am still getting hot at cruise. Is that the only water intake for the mercruiser 7.4/bravo III? how do I find out if it is clogged...