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    gm 305 exhaust tube?

    Sea-Ray 220cc/gm305 1978-82(MCM228) Almost everything checked,still i can't find why i can't ran over 3000RPM.Three things left to check 1)the old high tension leads 2)the valves(i've adjusted them properly but i don't know if they work properly) 3)i've replaced the exhaust tube with bellows...
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    gm305 1978 unstable idle rpm

    When cold the engine runs very smoothly at idle.When warm at idle the rpm varies.Can you suspect possible reasons for that? The distributor is a Mallory one ,i 've set the timing and dwell properly,the carburator rebuilt by an expert.Does the coil may be responsible for that? Thanks in advance...
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    SeaRay 220cc 1978/gm305 temperature behaviour

    Hello everybody, I have new thermostat,new thermostat housing ,still i don't Know if the temperature is ok.With the thermostat out ,the needle at idle in gear it just passes the yellow region(the first small box) and at 3000 rpm it hardly reaches the center.With the thermostat in ,at idle in...
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    What rpm is the idle for a gm305?

    Hello everybody Reading the service manual for a 1978 gm305(mechanical fuel pump-malory distributor) in an effort to adjust the idle-mixture of the 4barrel Rochester carburator,the manual says "with a tachometer adjust idle stop screw to obtain the specified RPM..."What is the specified RPM?I...
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    does Pre-Alfa lower unit fit with A1 gen1 uper unit?

    Hello everybody My upper unit has a code 5059613 year 1978 and from a databook i found it is a 898/228/260 model.Can i replace it with an A1gen1 upper unit without modifying anything?The drive shaft of the lower unit is the one with the pin at the top. Thanks in advance
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    A1 to A2 at Sea Ray 1978 with Gm305

    Would you please tell me if i can put A2(replacing also bell-housing-transom) at my SeaRay1978 with GM305?The replacement will be done by an expert ,i just want to know if he 'll have problems fitting the yoke to the engine.Thanks in advance
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    question about the timing (gm305 with points)

    Hello everybody I want to ask if it is possible to set the timing (by ear)wrong and the engine still works at idle good without indicating that something is going wrong.I am asking this because when i dissasembled the distributor at tdc the rotor looked the #6 point instead of #1(not absolutely...
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    question about the timing (gm305 with points)

    Hello everybody I want to ask if it is possible to set the timing (by ear)wrong and the engine still works at idle good without indicating that something is going wrong.I am asking this because when i dissasembled the distributor at tdc the rotor looked the #6 point instead of #1(not absolutely...
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    usual red sealer to intake manifold gasket?

    Please somebody tells me if it's ok to use the classic red sealer at the intake manifold's gaskets.I'm wondering because at the ends we have water and at the midle high temperatures
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    gm305 valve lubrication problem

    gm305 v8 year 1978-79 I had put SAE20-50 oil but after suspecting it for irregular behaviour of the cylinders i changed to SAE30.When adjusting the valves i noticed that the oil at first and the last one of the valves of the starboard side couldn't reach the top of the straws.After turning the...
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    gm 305 electrical problem?

    Hello everybody GM 305 year1980 May someody tell me if 4.7V on the + of the coil is enough ? Where is the resistor and how many Ohms should it be?May it be inside the solenoid at the back of the portside manifold (because i have the 4.7V at a pin of the solenoid? When the engine warms up and...
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    gm 305 1980 weak spark

    the engine doesn't have power.The spark at all spark plugs is weak.If i leave the cable + of the coil(transformer) on the air it has 12V but if i conect it to the coil it falls to 4.7V .With the engine running it falls a little more about 0.5V. I took out the cable - of the coil (with the engine...
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    SeaRay 220cc 1978 fuel tanks' valves?

    May somebody help me locate the pickup and the valves of my tank?
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    gm305 oil,fuel pump question

    1)Do you know if BP Vanellus C4 multi-purpose for both gas and diesel engines SAE20-50 is suitable for gm305 year 1978?A mechanic told me that any oil fater than SAE20-40 is dangerous to get the hydraulics valves stuck due to poor oil flow. 2)Next to the mechanical fuel pump there is a...
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    how to check a good oil flow at a gm305

    gm 305 1978 exept from unscrewing the oil pressure valve and the indication of it is there any other way to assure that i have good oil flow in my engine? if i take out the oil filling taps (when in neutral)should i observe oil moving? and something else ,the temp needle sould be always at the...
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    after replacement intake manifold gasket problem

    hello everybody After changing the intake manifold gasket i have the following problem.I feel that the half or some of the cylinders do not work.During the switching on the engine i feel some dead points.The motor is GM 305 year 1978.I suspect that something went wrong during the installation of...
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    power trim question

    Sea Ray mercruiser A1 gm 305 1978(prestolite power trm pump) The one of the two hoses of power trim pump goes to the plate where there is the the shift adjustment mechanism .There, in the opposite side of the automatic switch there is a small housing with two notches for adjust and the one hose...
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    Gm 305 intake manifold gasket problem

    Hello everybody, When i speed up (Sea Ray 1978 gm305 228HP) the temperature doesn't ecxeed the center of the meter but i can smell and see some smoke coming out from the edge of the intake manifold starboard at the center (among the two bolts,close to the automatic choke)and when this happens...
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    bell housings' rubber gasket found cut(A1)

    Hello everybody, After some leaking in the boat through the bellows,I pulled out the sterndrive unit and i found the rubber gasket of the bell housing cut and next to the gimbal bearing(mercruiser A1 1978). When i tightened the bearing retainer about two and a half threads were left out of the...
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    what oil press indicates?

    i 've a gm305 228 1978.When it warms up the oil press reaches the 60.Is it bad or normal?What problems the oil press may mean above normal?When it warns about something?
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