Recent content by StarCraft78SS

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    1978 Starcraft I/O Super Sport 18ft Prop Size Question

    Good afternoon, Quick question, I'm currently running a 13 3/4 x 15 prop. I'm wondering if this is the correct prop for this boat. At WOT around 3900 - 4300 RPM I'm getting porpoising. I'm wondering if I'm running out of prop because it will start around 28-30 mph but top speed is about...
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    OMC 2.5L 120 HP Engine max RPM at WOT

    Wanted to give an update on what we found. We found the timing to be retarded so we reset that and also that the engine started to run much better with the air filter off. It's one of those metal style ones, so we cleaned the filter and it took 2 cans of carb/ brake cleaner to get it totally...
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    OMC 2.5L 120 HP Engine max RPM at WOT

    I should add, on the last outing, not that I want to admit this but I did some checking for weeds and noticed there was tape over the exhaust port on the outdrive from when it was painted. Wasn't fully covering the exhaust port but I wonder if excessive exhaust back pressure has anything to do...
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    OMC 2.5L 120 HP Engine max RPM at WOT

    Thanks for the extra tips, I'm not totally sure on compression but we could run tests. We didn't personally rebuild it but he is reputable mechanic with friends with the family for 30 years. Water in the upper gearbox - will have to check this Bad carb linkage (look at bellcrank) - will have...
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    OMC 2.5L 120 HP Engine max RPM at WOT

    This is a new to us boat but we rebuilt engine. We will check out these additional items. Appreciate the information.
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    OMC 2.5L 120 HP Engine max RPM at WOT

    Interesting, any ideas on why it might not achieve?
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    OMC 2.5L 120 HP Engine max RPM at WOT

    Do you know a way to test the tach?
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    OMC 2.5L 120 HP Engine max RPM at WOT

    Hello everyone, As the title states, I have a 1978 OMC 2.5L I/O and I'm wondering what the max RPM at WOT would be in a ball park? I'm currently getting about 2800 RPMs with a speed around 26 MPH. We fully rebuilt the engine and the carb is running amazingly. I'm not looking to be speed boat...
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    1978 OMC Winterizing

    Attached photos for reference of the engine. Thanks!
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    1978 OMC Winterizing

    Hello all, I have a 1978 StarCraft 18 foot inboard with a OMC engine. Just wondering what you guys all do to winterize. I have poured RV antifreeze good to -50 down 3 hoses on top of the engine. Had good red coming out of the two drain petcocks, out the impeller holes down by the prop, and on...
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    1978 18' Starcraft Super Sport Restore

    Omc, with Omc stern drive. We got all the parts and are rebuilding it currently. The engine was sitting in a shop for 30 years and of all things the wrist pins on the pistons were rusted. No rust on cylinder walls though. See something new all the time.
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    1978 18' StarCraft SS Seat Question

    Hello all, I was wondering what you guys recommend or have used in the past for pedestal seats in your boats? This boat did not have pedestal seats before so I'm looking for recommendations for the base, pedestal and seats. Thank you!
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    Flooring

    Thanks for that. I appreciate it! Great looking boat you have there by the way. We took our flooring out yesterday. They had marine foam under the boards and once you scrap away the top layer it looks mint so I don't think we are going to replace the foam. But wanted to order up the marine vinyl...
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    Flooring

    Hey, I've been looking at the shark grey myself and wondering if you had any pictures of your boat flooring etc so I can see it installed on boat? Thanks!
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    1978 18' Starcraft Super Sport Restore

    Hello everyone, I'm new to the boat restoring world and I was hoping someone could point me in the direction of a restore tread for a 1978 era 18 foot Starcraft Super sport I/O? My dad and I just purchase one that is gutted down to the flooring and we're going to replace all the flooring and...
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