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    1978 90 mercury inline six outer prop shaft oil seal

    Dose the rubber part of the seal go in the housing first or metal surface? outer seal --- |~ |~ ------------------------ |~ prop shaft |~ ------------------------ |~ |~ ---- ~ is the rubber side of seal, dose it point to inner seal or away from it when installing?
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    Prop Shaft leak 1978 Mercury 90 ss# 5031148

    1978 Mercury 90 ss# 5031148 Slow leak from bottom of overdrive/prop shaft. There is a 1 2/3 42mm diameter oil seal on shaft under the big prop washer. nut-->nut lock washer-->prop-->big prop washer-->seal with rubber-->pressed in seal on shaft. It just slides of shaft after big washer. Is this...
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    Tac stopped working stator regulator or rectifier

    Unfortunately I hooked up battery backwards. Got used switch box and runs fine, but tac worked only a couple seconds. Any ideas, can it be stator regulator or rectifier?
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    Drilling holes compadibility

    I have the wholes drilled for a 78 90 hp mercury will other manufactures motors bolt on without drilling new holes in transom?
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    To lean or to rich

    My 90hp tower won't start well when cold. Will if I spray forging oil in cylinders. Willl idle fine when cold, but extremely low idle when warm and kill. Pumping bulb dose not help.. Would you guess it is set to run too lean or too riich with idle screws two carbs.Timing OK.
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    Prop has Merc # 48-77346-19 stamped on it

    Prop has Merc # 48-77346-19 stamped on it. My 90hp tower power is two hours a way but I have a very bad 48-77346-19 Propeller. Iboats says that one of there prop is for 1978, (#1411-130-19), and newer another for 1977,(#1411-130-19) and earlier 90 HP. My motor has distributer--I don't have SS #...
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    90 tower power Idles fine when cold but not hot

    Idles fine when cold but not hot choke off both times Runs fine off idle no lag on acceleration 2 carbs Where would you start
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    Rebuild Kit 1982 90hp inline 6 fuel pump

    Mec part # ? or other
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    Set timming 80s tower power 90, merc.

    I saw how to do this on youtube statically. Set primary pickup idle advance Remove idle stop plate Remove spark plug # 1 put it by ground Set to timing mark ATDC 5 degrees Twist distributor cap bank and forth Listen or watch for spark on # 1 Look for black arm on distributor to just touch...
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    bad idle after warm up early 80s Merc 90 Tower Power

    Won't idle after warm up--dies. I have to keep it running by pulling up fast idle lever. Starts fine Idles fine when cold. Has 2 carbs Any ideas? Shop tuned it up said they fixed it but it did not help. They wanted more $$ to work on it.
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    Some gearcase grease looks lighter in color whitish and a 1/4 cup off water 90 TP

    This is after 20 hr of running. Is this acesive and if so what things /seals should be replaced. 90 HP tower of power
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    Deck rot by lift pump 1979 Century 19ft

    Can you replace only the last foot or so of the deck that seems to be a bit rotted on both sides of the engine? The worse spot is under the tilt pump screws. Dose this mean I probably have bad stringer problems also? Were Centuries know to rot or were they well built? Any tips on checking for...
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    1978 305 898 Exhaust Shutters

    I am pretty stupid about how this boat stuff works. I read some about Exaust Shuters. Can I get @ them in my boat. They said somthing about old style and new style location. Were are the supposed to be on my boat? I here some people just take them out. Do they ever get parcialy stuck shut...
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    Head suggestion 1978

    I have a cracked block 305, so I picked up a 4 bolt main 350 today to build for my boad. I would like to get the 200HP the 305 had. The 350 has the crappy 624 but it dose run. I was thinking even my 305 heads would give me a lot of low end grunt on the 350? Any sugestions on a NEW SBC Head...
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    1 vs 2 Piece Rear Main Oil Seal--old vs new block

    So I want to swap out my cracked block 305 with a 350 smallblock. If I use a 86+ motor can't I just use a Rear Main Oil Seal Conversion thing 2pc crank and it will be fine? http://www.circletrack.com/enginetech/ctrp_0712_rear_main_seal/viewall.html Will my exaust manifolds work ok? Will the...
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    Sealant with new exhast elbow gaskets 1979 - 898

    I am going to replaced the 3 gaskets between each exhaust elbow and the exhaust manifold. Should I use RTV or somthing when doing this?
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    1997 V6 896 305 Removal

    If I understand correctly you remove both front and rear motor mounts from boat @ the bottom and remove the moter with the bell housing still attached AFTER removing stern drive--correct? You DO NOT remove only the front mounts and pull the moter away from the bell housing.
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    5.0 to 5.7 swap

    5.0 1979 has cracked block Found 5.7 with motorhome cam. Can I use intake carb and distributor from my 5.0 What else will I have to change on the 5,7 -- I will have the heads rebuilt. What year automotive 5.7s can I use. This is the engine I plan to use...
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    Engine Stand / Weight 79m 305

    What size engine stand do you think I will need to do a build up 0n 1979n 305m Mercruiser? Will a 1000lb work or will I need a 2000lb I want to put the exhaust manifolds on while on the stand. Anyone know what the motor weighs intact?
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    size of fuel line between pump and carb old inline 90 merc

    size of fuel line between pump and carb old in line 90 merc? is there a fuel filter under the pump outlet?
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