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    GM Vortec 305 Flattop piston ?s

    So I picked up my new reman short block to get the boat going again (99 Glastron w/ 5.0 Volvo Penta GL GM 305 block SX outdrive) and I noticed the new motor has flattop pistons rather than dished pistons like the original motor had. Is there going to be any issues with these flattop pistons with...
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    Marinize GM 305

    So with little response to my other threads I think Ive figured out the route id like to go to fix my boat (cracked block). Its a 99 Glaston with a GM305 5.0L Volvo Penta motor. Ive found a local engine reman/machine shop who sells GM 305 complete reman short blocks for pretty cheap and Im...
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    99 Glastron / 5.0L Volvo Penta engine swap to?!?

    Well the block ended up being cracked on my 99 glastron (LONG LONG story and lesson learned from dealership/worst customer service ever) anyways I need a small block for my boat. It currently has a 5.0L Volvo Penta with a 305 GM block. Im wondering what all will swap into this thing without...
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    Mercruiser 5.0 interchange w/ Volvo 5.0

    Well I know for sure I have a head gasket issue on my Volvo Penta 5.0Gl with GM 305 block and Im hoping thats all it is (long story) but I picked up a used long block 5.0 Mercruiser GM 305 from a guy who didnt winterize it and cracked the block with only 60 hrs run time on the motor. So the...
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    Possible Blown Head Gasket?!?!?

    99 Glastron 5.0Gl Volvo Penta / SX Outdrive only 100hrs on it!!! Well Ive tried to track down this damne rattle noise from the back side of the engine and havent been able to figure anything out. The u-joints are good, the gimble bearing is good and outdrive is smooth. So I think maybe the...
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    Volvo Penta 5.0Gl / LX tick/clack noise with acceleration

    Well I just recently purchased a 99 Glastron with a Volvo Penta 5.0GL and SX outdrive from my buddy's grandma who only put 99 hrs on it. The boat is in mint condition and was dry docked at the marina all its life. I had it checked out at a local boat dealer before purchasing it and all was said...
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    3.0 115HP Merc more low end prop ?

    Ok first for the boat info: 94 Glastron 17" SSV 175 with 3.0 Mercruiser 115HP currently the prop is brand new a 3 blade 13.75 x 21 (what it says on the prop). Well Im fixing to be adding a Big Air tower to the boat and want more low end pull to help out the wakeboarding situation. I could care...
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    plug R43T same as MR43T?

    I'm in the process of changing the spark plugs on my 3.0 Mercruiser and all the parts store carries is a AC Delco R34T and not the recommended MR43T, are these plugs the same? I've already tried the Autolite 145s and they made it run terrible. Any other suggestions for plugs? Thanks-Josh
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    Rough / Bouncing Idle 3.0 Mercruiser

    Ok so I just purchased a boat (im pretty new to the boating thing but plenty mechanically inclined) and I cant get this thing to idle right. Its a 94 Glaston with a 3.0 Mercruiser Alpha One engine. The guy I bought it from had it in his shop all winter so it was in good shape and started right...
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