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    Piranha Prop blade replacement/spares

    Guys, I'll be getting a Piranha Composite prop soon from someone. It has the replaceable blades. I'll get one hub, with a set of both 18P and 16P blades. Say I find the 18" run great for my setup so I use those as my regular prop. If I hot something and break a blade can i replace that one...
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    Carry extra gas can onboard?

    OK, stupid question, but important. Can I/should I carry an extra can of gas onboard in case I run out? Say a 5 gal plastic can or the like. Seems like a good idea, but is it safe? Where would one store a gas can? Under a seat or is that stupid due to fumes potentially building up? Under...
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    Can I upgrade/convert a 2bbl V8 to a 4bbl?

    I read something in another forum about changing a 2bbl engine to a 4bbl. Can this be done, and if so, what's the approx. cost to have someone do it for me ?(I'm not too good with repair stuff). 1985 305 v8 200hp Mercruiser with Alpha drive.
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    One-piece cover for dock/dry docking?

    I know, a REALLY noob question, but here goes. I am soooo sick of unsnapping and re-snapping my Bow Cover and Convertible top each time we take the boat out! It takes too long and just doesn't seem like a smart way to keep the boat dry. We NEVER ride with the bow cover on and only use...
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    WOT RPM only 4000; my next move?

    My "new" boat is a 1985 Mark Twain 19' Bowrider. about 2500 lbs unloaded with typical load around 700-800 lbs. I have finally had a chance to get more info so I'm hoping for some guidance on prop selection. I have no problem trying a few different configurations but I want a plan of action...
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    Oil change - How's it done on I/O small block?

    A couple questions. I have no owners manual for my 1985 Mark Twain 19' Bow Rider so i count on you smart guys! Mercruiser 5.0L, V8, 305 engine (I think) First, how does one go about changing the oil for an I/O engine? Is it all done in the engine compartment? Is there a drain plug like on...
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    Suggestions for a gas additive / lubricant?

    In a previous topic, someone had a link to the mercurymarine.com web site section about what type of gas to put in their various engines. For my 1985 V8 (and most older ones) they say use "A good-grade automotive valve lubricant" with the 87 or better octane gas. What is recommended for this...
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    What type of gas for my "new" 1985 boat?

    1985 Mercruiser Chevy Small Block V8 5.0L 200hp 2bbl. Just wondering what octane level of gas these were made to run on and if higher octane helps, hurts, or makes no difference? Also, can I fill it up at a regular gas station or do they put ethanol, etc in there that isn't for an older...
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    Steering seems VERY loose when going slowly

    19' open bow 200hp I/O. My boat seems very hard to keep straight under low throttle, as in no wake zones. Swings left, then right with minimal correction from me. Any ideas why or what I should be doing to help this situation? Sometimes the water is a bit shallow so i trim it out which makes...
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    Weight distribution for WOT testing?

    I have a new-to-me 1985 Mark Twain 19' Open bow that weight about 2500. V8, 200hp (at least rated that - who knows what it really puts out 21 yrs later). I've never inspected prop as I bought the boat in the water and fully plan to replace it once I know what to get. I'm told it's a 19"...
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    "Loran-C" navigation system/GPS. Still around?

    Hey, got my "new" 1985 boat and it has an "Automatic Loran-C Receiver" unit. I haven't even turned it on but am told it does turn on - previous owner (short term) never tried it at all. There is a long "marine type" antenna for the unit which I'd get rid of if it is of no use. Looking at the...
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    Were to attach bridle for skiing and parasailing?

    OK, may be a stupid question but I need to know....I have a new 9to me) 19' Bow Rider I/O and I'm wondering how strong a couple of fittings are for pulling skiiers or my parasail. Just a a frame of reference, a parasail requires about the same pull force as pulling a 200lb novice skiier so it's...
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    Help with proper WOT RPM and speed

    New to this stuff but just bought a 1984 Mark Twain 19' Open Bow - great looking and somewhat unique boat imo. I'm learning here as I go so be patient. I now know I should learn the proper RPM range for my engine. Here are the specs. Boat: 19' V Hull, open bow, about 2500lbs - a fairly heavy...
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