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    470/170 Exhaust Manifold leaking

    My engine sounds like the exhaust manifold is leaking. 1981 model, and doubt if it has ever been off the engine. Are there any sure test, and what causes exhaust gasket to go bad?<br />Temps are fine.
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    Grease or no Grease?

    Just replaced shift cable on 81 pre-alpha. Went to new style. I have read conflicting info on whether or not to grease the roller mechanism and actuator (aluminum piece on end of shift cable that roller rides in).<br />I read that I should lighty lube with gear lube.<br />What do you guys think?
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    Shift cable replacement kit

    Have 1981 i/o 470 with 1 outdrive<br />Kits on internet to convert to new style shift cable require a 1/4-18 tap. What can this be for? Hole that old shift cable came out in bell is 1/2".<br />Their answer was 1/4 NPT is as big as 1/2 straight. <br />Best source for kit??<br />Thanks
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    Shift cable replacement or ???

    Mercruiser I/O 470 Pre-Alpha Outdrive<br />I am in the process of replacing all bellows, if I can ever get the nuts loose on the pivot pins. <br /><br />My exixting shift cable has nut on boat side of bell housing. Should I change the shift cable <br />out to the newer style that has nut on bell...
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    Help, Buddie is crying,,any options

    Friend had boat out today, his brothers boat, and when he parked it at house tonight, he was almost crying. Prop was busted and part of lower housing (fin) was missing..Any thoughts on what the total fix is? Know he needs prop, but are there any options for broken fin other than new lower unit...
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    Pre-Alpha..R..???

    I have used the outdrive ID web site, and I have a Pre-Alpha outdrive. What is the proper way to describe this drive on this board??<br />Thanks, don't wanna appear totally dumb.
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    "R" drive bellows replacement q's

    Have 1981 Mercruiser, I/O 470, "R" drive. Replacing shift bellows and exhaust bellows. Drive bellows good. Have read all postings and great info, especially from Trent. Is the procedure for shift cable bellows replacement the same for "R" drive as for Model 1? Any known helpful hints?<br />Thank...
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    1981 470 trim pump questions

    New but feel old. I have 1981 Mercruiser 470, water cooled VR, big heat exchanger, Pre-Alpha all the way (I think). Boat sat up a few years but engine and drive now running great after carb ( Rochester 2GC) rebuild. Now attacking smaller probs. Focus now on tilt/trim pump. Merc part 88475AT...
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