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    5.7 MerCruiser blown what can I replace it with

    So I finally got my 5.7 mercruiser engine running great past couple days full tune up oil change use Mercury oil 25w40 mercruiser oil filter engine was running great hitting about 49 mph at 4800 RPMs. Today today out on the water I was running about 37 to 40 mph 4400 rpms and the engine blew...
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    Ignition buzzer not working when ignition is on

    So I noticed a lot of boats when you turn the ignition on before starting the engine you hear a buzzing or alarm sound that goes away when you turn the engine on.. II take it this is related to oil pressure and the reason it goes away is because positive oil pressure is detected and satisfies...
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    Do I have thunderbolt IV or V?

    1996 mercruiser 5.7 serial 0F760044 attached is a picture of my distributor and it looks like there is only 1 module with one plug on the back of the distributor. just trying to find out so i know how to handle timing of the engine when i go to do that. thanks for the help! i did try using...
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    Brand new spark plug exploded and left me stranded. (AC MR43T)

    So I just replaced all the spark plugs in my mercruiser 5.7 I use the recommended Quicksilver AC MR43T spark plugs.... I I was running wide open throttle 4800 RPMs for probably 3 minutes The boat had been running great all day and then all of a sudden I heard a loud gunshot and then a really...
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    Can I upgrade to the Edelbrock 1409 carb?

    I have a mercruiser 5.7 originally was a two-barrel setup.. The previous owner has upgraded to what appears to be an Edelbrock intake manifold and a four-barrel carb. I I looked at the numbers on the side of the carburetor looks like it says Rochester 17080565 2431 It's really weird there's...
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    Think I found my possible culprit for low WOT at max rpm

    So I've made a few different posts about propellers and low wide open throttle at max RPMs on various places.. So so I went ahead and started digging in today I went ahead and started to replace the cap rotor spark plugs and spark plug wires. I'm using Quicksilver Mercury parts for the cap...
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    prop diameter and rpm correlation?

    my boat originally came wit ha 13.75 x 21p propeller with my 1:62 alpha 1 gen 2 drive. currently it has a 14x19p quick silver prop. right now i can only get a consistent 4200 rpms and 35-36mph confirmed by the onboard speedo and GPS speed app on my phone. my 5.7 mercruiser engine has a max...
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    Water leak into bilge, speedo tube or transducer thru hull fitting possibly?

    1996 sea ray 210 mercruiser 5.7 alpha 1 gen 2 setup. speedometer has never worked since i owned in past 2 months. i did replace the broken plastic connector that connects the hose to the outdrive when i did my bellows kit installation. i've replaced all bellows with mercruiser quick silver oem...
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    new prop, lower max RPMs and speed?

    1996 sea ray 210 mercruiser 5.7 210 hp alpha 1 gen 2 with 1:61 gearing. according to the sea ray sport boat PDF this is how m boat was originally specced Year Model Engine Drive Ratio Prop Size WOT RPM 1996 210 BR 5.7L (210 hp) Alpha 1 1.62:1 13.75 x 21 4600 so...
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    Can't get outdrive back on, gear selector keeps moving

    So I've just finished doing my complete bellows kit job on my alpha 1 Gen 2 '96 Sea Ray 210. I made sure that the that I was in forward gear when I removed the outdrive... I finished reattaching my lower shift cable and my gear shift lever is back and forward position... The gear selector foot...
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    Water Trapped inside hull

    1995 Regal Valanti 182SE bowrider Purchased my boat few months ago, worked through some engine issue and got that solved but recently noticed that at full speed when hitting waves or swells, water would come into the cabin area. i couldn't quite put my finger on it until i got into the water...
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    Having tough time determining which thermostat I need

    my engine is a 3.0lx mercruiser serial 0F604166.. at least thats what is on the paper from the previous owner. I havent actually looked on the engine itself for that number or know where to find it. I looked on both...
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    Is this the correct carburetor for my engine? (95 3.0lx merc)

    So I bought a used boat (1995 regal valanti 182SE )....story my life and it started up with the water attachment running water to the engine with no issues on the day I went to purchase it... Finally get on the water the next day and had just put in about $15 of 89 octane gas ethanol not...
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