My Engine temp guage on my 7.4 is reading 100 to 120 during operation water temp is 85 degrees motor is a fresh water system. I have just completed the break in period and have a 160 degree thermostadt installed. Obviously this temp reading can not be accurate. What is the proper trouble...
I just replaced the trim sender and limit switch on my 7.4/Bravo and I am trying to adjust the sender. With outdrive all the way in when I am rotating the sender I reach a point where the guage moves from all the way up to all the way down. I set the sender at this point then when I trim up the...
I have a 7.4 with a Bravo Outdrive and an early style power steering component. The outdrive has a considerable amount of play sided to side. It moves 1-2 inches both left and right without the steering wheel moving. I have checked the tiller arm and it is tight. The slop is in the power...
I have an 89 Webbcraft that I am about to get on the water and want to make sure that I have the exhaust set up correctly. This boat has two sets of exhaust tips, one set exits the engine compartment into a set of boxes built in to the hull under the swim platform then another set of tips...
Re: 7.4 mercruiser backfire noise / water in oil
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Still working on this project boat, had heads cleaned up and checked for cracks, replaced head gaskets and ran on muff sounded great. Put it in the lake and it...
I am trying to get a mercruiser engine serial number for a big block motor which I think is a 7.4 / 454. The mercruiser serial number is not in the listed places per the Service Manual by the starter or on the valve cover but I have the following casting number from the front of the block...
Looking for some help,I have a 7.4 mercruiser/bravo and have not had it on the water yet. It had some issues that needed attention before I hit the water. The water pump impeller was shredded and it appears that it was run hot because the inside of the one exhaust hose was burnt but not...
I bought an 89 Webbcraft 23.5 Velota with a 7.4 mercruiser. The oil cooler on the motor is part 89690T and is a dual engine oil and power steering oil cooler. It appears that it was only being used for the power steering fluid and not the engine oil. It was split so I need to replace it and want...
