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    454 thermostat issue?

    Hey guys, been awhile but I have an issues that I know someone will help me with. Gen 4 454 unwinterized the engine and started at home on the trailer. It ran beautiful. I get it to the river, start it, everything appears good. I leave the dock and smell the paint cooking, look at the temp...
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    2007 Yamaha pipe joint repair

    I am working on a 2007 yamaha fx cruiser and have to repair the leaking pipe joint in the bottom of the ski. [I] have the engine removed and I need help on how to remove the coupler from the end of the impeller shaft so I can slide off the joint. Any help or ideas would be great. I see a...
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    Mercruiser 454 temp help

    I have a gen IV 454 Mercruiser which is carbed, and turning a Bravo iii. I replaced the temp sending unit the other day but I ordered the wrong thread. The manifold has 1/2 npt and the sender was 3/8 npt. I used a brass bushing to use it. I took the boat out for the first time this season and...
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    454 wont go over 32-3400 rpms

    Im still working on recovering and repairing all the troubles I had during my vacation trip. I had a bad U-joint and I replaced both of them now, along with the gimbal bearing and bellow. I swapped my B1 lower that was cracking for a B3. The other problem I had was that I would come up on...
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    Bravo Swap

    I was on my annual vacation this past week and put a couple hundred miles on my boat. I currently have a 454 with a Bravo 1 Outdrive. I noticed a bad cluncking sound during the trip mostly while turning at the marinas. The u joints are shot. After I pulled the boat out of the water I noticed...
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    Converting floor

    I have a Quicksilver 300 SIB and it currently has the air deck floor. The material around the inflator valve started to peel up and is leaking air. I am considering buying a new air floor or changing to the wood floor. How hard would it be to convert? What all parts other than the wood will...
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    454 water help

    I had a problem over 4th of July weekend during a big storm. I wrote in about the problem. Long store short, it ingested water through the exhaust and ending up with a bent connectiong rod. All has been repaired and engine put back in the boat. When I reistalled the motor I also replaced the...
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    Alpha 1 and Alpha 1 Gen 2

    Alright. What are the differences in the gimbal, transom, bellhousing assembly between the Alpha 1 and Gen 2? Are all the parts different or are some the same? Can you switch the ring and bell? I have a combination of both units and tring to get one complete assembly. The gimbal housing...
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    454 making a knock/tap noise

    Alright guys, this one has me stumped and I need some input. Carbed Gen Iv 454 with a Bravo 1 outdrive. I ran the boat friday to our river house and anchored out front. Boat ran perfect as usual. I stayed on the boat sunday night because we had a really bad storm come through. All is well...
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    Stereo Interference

    I am having a lot of stereo interferance when I am using 12v power on the refrigerator. I have no issues from the engine or any other source, but when the refrigerator kicks on you can barely hear the radio from the buzzing. Any ideas?
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    Prop Question

    Alright guys, I have beat this around with every boat guy in town. I want to get some outside input and see what your opion is. I have a 19p Mirage on my 27' Sun Runner. The boat has a carburated 454 with a Bravo 1 outdrive. Went out last Sunday for a sea trial and here are the results. My...
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    454 timing issues

    Need some help. I have a 1995 Mercruiser 454 with the Thunderbolt iv ignition system. First, I will set the timing at the recommended 8 degrees advanced. The engine will idle perfect at 750-800 rpm. I give it gas and it bogs down and backfires throught the carb. Nice. I then can advance the...
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    Bravo 1 Shift Problems

    I just installed a 454 and Bravo 1 drive into my boat. I installed a new cable from the helm to the engine. I also replaced teh detent inside the upper housing. The problem that I am having is that I can adjust the cable to allow me to shift from Neutral to forward but I don't get any reverse...
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    Plug Location

    This will be my first winter with an i/o. I have a 1989 MAG 350. The exhaust are center rise. It is a raw water cooled sytem that is run in brakish water. I am wondering where to find all of the plugs that need to be removed from the engine and exhaust. Thanks
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    Alternator

    I just want to clarify the earlier port I had on replacing a three wire alt to a one wire.<br /><br />I have a orange to battery, a red-purple and a purple from the regulator and a black from the ground bolt. <br /><br />To put the 1 wire in I should tape off the purple-red and purple wire. I...
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    Prop selection

    I have a 1989 Marcruiser 350 with Alpha One. The boat is a 21' Larson mini cab and bow rider. I tested the new engine and the rpm's are way too high. I can hit it and WOT was never found or was at the end of the tach. I was running about 5800-6000 when I lifted. The prop is an Aluminum 21P...
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    Alternator Change

    I have a 1989 Marcruiser 350 with Alpha One. I want to convert from the three wire alternator to a one wire. Where do the two wires go, where does the orange go and where does the black go?
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    Stalls out when shifting to neutral

    I have a 350 merc with an Alpha One outdrive. The engine shifts smoothly however when I pull out of forward into neutral the engine will shut down. Every so often I can manage to get it into neutral without it stalling out but its rare. Thanks for any help
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    Manifolds and Risers

    How can you test the manifolds and risers to see if they are flowing enough water?
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    I need help with overheating, Please

    I have a 1989 Mercruiser 350 260hp that is running hot. The engine was just replaced with a reman. unit. It has a raw water cooling sytem as pictured at http://www.mercruiserparts.com/images/cruiser/816596/21.png . I ran the engie in the driveway with muffs and it felt warm but temp gauge read...
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