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    Prop change rpm gain?

    24 ft tritoon with 5.7l I/O engine 1.47 alpha gen II drive currently. 14 inch 19p stainless prop. New sized engine to the boat with no successful runs over 2600 rpm. I have another post in the mercruiser forum to trouble shoot engine issue possibly. When it had the previous engine 3.0l with 1.98...
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    Mercruiser 5.7 won’t make power

    Bear with me I will give all the specs first. Boat is a 24’ Tritoon with an I/o set up. Came factory with a 3.0 but I shoes in the 5.7 and everything as far as mounting was done correctly and is properly lined up with the drive. The drive is a alpha gen ii , I bought a new upper unit from sei...
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    5.7 harness modification

    I have a 1998 vortec 5.7 with Holley 4 barrel 4175 series electric choke that I just rebuilt the engine and carb, it will have a alpha one gen two drive going in my pontoon. The harness I have was severely hacked so I am going to build a new one from the remnants of the old one. My engine does...
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    5.7 truck cam vs marine cam

    So I got a 5.7 engine from a 1998 Silverado that I’m rebuilding, the truck cam in it is roller and flawless so I’m thinking about using it. My question is how much performance difference would there be between the truck cam and a factory marine cam? I have the specs truck is 415/428 lift 196/191...
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    Alpha one gen one on gen 2 gimbal housing

    I have a 2001 pontoon that had a 3.0l alpha one gen 2 drive. I am changing engines to a 4.3. I have EVERYTHING for the 4.3 swap but when it comes to changing the gimbal housing and transome plate I would like to not change that because I had just rebuilt it with new boots, shift cable and...
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    4.3l electric fuel pump conversion

    I replace a cracked block on a 1989 4.3 4bbl Quadra jet that had a mechanical fuel pump. When I bought the new rebuilt block it had the hole for the pump but it was cast solid inside, the mounting holes were not even drilled.so now I am stuck going to a electric pump. I have done some Research...
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    4.3l engine questions

    Ok I have read a lot about the 4.3 it’s pros cons and horse power but still have a few questions. 1. Can you put vortec heads on a pre vortec block and still achieve the same compression ratio? If not is it the actual piston that is different or are the rod lengths different? 2. is there that...
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    Small prop to avoid damage?

    I have a pontoon with a I/O and like to beach to boat a lot at camp grounds and sandbars on a lake in Georgia. Problem is I get a ton of small knicks and some decent ones from going into shallow water. My prop is dead even with my skeg. My question is can will a skeg protector in crease the...
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    Mercruiser 3.0 fuel issues

    I would like to thank everyone for their help, I have had a ton of issues and gotten through them thanks to your help. as usual though I have another issue. I have a 95 3.0 lx motor in a 24 ft Godfrey pontoon. I was having fuel issues and finally rebuilt the carburetor and bought a new fuel...
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    3.0 stumble stall when cold, great when warm

    i have a 90's 3.0l mercruiser engine with electronic ignition that stalls when throttle is advanced after i first start it. it starts first try everytime, idles great,but when i push the trottle above 1000rpm its stumbles then stalles for about 3 tries then when i advance it very slow it will...
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    What prop for pontoon with 3.0l ?

    I have a 2001 parti Kraft 24 foot pontoon with a mercruiser 3.0l I/0 and alpha 1 gen 2 drive. I’m new to this boat and just put in a new engine. With gps I am only able to get up to 19mph. I didn’t get to drive the boat before changing engines so I don’t know how fast it should go. My question...
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    Mercruiser 3.0 losses power

    I have had bad luck with the 3.0, rebuilt my engine and it flattened two cams on same lobe, a lot of you helped me trouble shoot that thank you. I have up on that engine and bought another boat for the motor. i pulled the motor out of the donor boat swapped everything external from my motor...
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    Explorer towing, what’s your thoughts?

    I have a 2001 parti kraft 24ft pontoon with the 3.0 I/O. And I have a 2018 Ford Explorer 4x4 with the 3.5 non turbo. Tow rating 5000 lbs. the lake is 55 minutes from me, all interstate driving. I have a newer f150 Alain that I have towed the boat with this far but we like to go camping and take...
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    Mercruiser 3.0 knock

    Ok, i recently bought a pontoon with a mercruiser 3.0 I/O that had blown the head gasket 3 times. I am a jet mechanic by trade so i know how to turn a wrench but not so experienced on boat or car motors, so i took the engine apart and had it bored, decked, the head rebuilt, installed all new...
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    head gasket or other issue??

    i just bought a 2001 PartiKraft 240 with a I/O 3.0L Mercruiser with 435 hours on it. The previous owner said the head gasket kept blowing on him. he said first time they changed the gasket for having two cyl no compression and it blew again within thirty minutes, second time he rebuilt the head...
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    Tilt trim relay part numbers

    Got a used force 90 1991 motor for ignition parts and bonus is it has a hydraulic lift system on it and components look newer, it has relays but are corroded. Is there a relay part number from advance auto any knows will work ? Anyone have a good diagram? I
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    Stator orientation

    I took the stator off to replace it and kids interrupted me, now I cannot remember which way it is clocked. 1991 force 90hp half the stator is for ignition other half for charging, there is no idiot proof way so if anyone has a picture or can explain to me how to clock the actual stator I would...
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    No spark Nbr 1 cyl, tach quit working

    long story- I have a 1990 force 90hp on a Bayliner Capri 1800 that I bought last month. Took it out first time and ran like bat out of hell all the way down the lake. I bounced across a wake when I throttled back for a no wake zone. When I went to throttle back up the engine was only making...
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