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    Trailer Too Low

    Is there any lifter block to raise the trailer<br />chassis for 3". Pls. advise. Thanks
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    3.0 OMC 140-HP

    Hello, I'm here again to ask questions from you guys. I have 1979 OMC 3.0-140-HP with 17"pitch<br />prop. I'm wondering why it takes too long to get<br />on plane with a speed of 2500 rpm. with 2 persons<br />on board. I'm new on boating hobby so I need some<br />advise. Thank you.
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    3.0 OMC ENGINE '79 ( Carb Idling)

    I'm adjusting the idle of my boat 3.0 140-hp OMC<br />1979 (GM)if I set to 600-700 using the water hose<br />(muffs)the engine is almost died.<br /><br />Do I have to adjust the idle while in the water.<br />The timing is okey, compression is okey. Your recommedation are highly appreciated.By...
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    3.0 OMC Engine Speedometer

    This both is OMC 1979 3.0 140 HP GM engine. There's no Speedometer gauge. Is anybody knows<br />conversion of 3500RPM to MPH I don't have budget<br />to buy one. I appreciate your help.
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    3.0L OMC Engine

    I noticed that only 3,500 rpm I got and the engine is aalready noisy. Timing is o.k it seems to me everything is okey. Is there anymore things to do to improve the rpm. and what is needed to be change. You advise is greatly appreciated.
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    3.0 OMC Engine Timing Mark

    I'm wondering why there's no BTDC and ATDC marking<br />maybe it has been erased the boat is 25 yrs. old. <br />Is anybody knows if this is correct BTCD 8-6-4-0-44-6-8 ATDC. Therefore the timing should be 4 deg.<br />BBTCD. If this is not the correct. How to get the 44-deg. timing. Thank you for...
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    3.0 OMC Tachometer

    3.0 OMC Tachometer Anybody can help me to trouble shoot this problem.<br />Tachometer does'nt work. Is there any procedure<br />to test the unit if working or not. Thanks.
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    3.0 OMC Prop.

    I'm going to change my old prop. 13-3/4 x 15, now is there any better size to improve the power. your recommendation is greatly appreciated. Thks.
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    OMC 3.0

    Previous problem was oil mixed with water (milky oil)now I installed the new manifold I test the boat in the lake for 4-hrs. Now, there's no more<br />milky oil but I'm wondering why the oil is to dark and this is second change oil since the new<br />manifold was intalled. I appreciate your...
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    79 OMC 3.0 - 140hp Temperature

    I just installed new manifold and riser but it seems that when the engine running at 2000RPM the<br />temperature goes up to 170 deg. using water-hose.<br />The engine timing is okey, anything else that need<br />to be check. Your recommendations are highly appreciated. Thank you
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    omc manifold for 3.0 engine (GM)

    Since I don't have enough experience on marine engine I just want to find out what is the most probability that water goes into the engine. Is it<br />comes from the intake or more likely on exhaust.<br />the cylinder intakes are very clean but exhaust<br />seems black and rusty. Any suggection...
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    3.0 GM Engine-1979-140HP

    While I'm waiting for a new manifold I performed compression test and the readings are No. 1 cyl. 155, N0.2 170 No. 3 170 No. 4 165 is this acceptable to assume that block has no crack. Actually the main problem is water and oil mix so I removed the cylinder head for presuure test and the result...
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    impleller

    what is the symtoms of bad impeller. In a car if water leaks in the water pump meaning you need a new pump. But in marine engine is a procedure to check if impeller is working properly. your ideas are highly appreciated.Thank you.
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    exhaust manifold

    I'm looking for a new manifold for omc 3.0 140HP-<br />1979(GM). Anybody can recommend the right supplier<br />Thank you for your help. I'm new in the boating<br />hobby. A freind of mine gave me this boat free.
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    water and oil mix omc 140HP-3.0-181-1979(GM)

    Is anybody can help me to diagnose about this engine problem. I remomed the cylinder for testing for crack but there's no problem. again I put it back, installed new head gasket and new intake manifold gasket during a test for 30 min. using waterhose it seems that everything is okey but when i...
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    Engine

    I have a 1979 OMC 140-HP 3.0-181(GM).I'm having a problem because the wter and oil mixed. I changed the head gasket and cylinder was tested and no<br />crack at all, the exhaust manifold gasket is new.<br />Can anybody give me any idea how to fix the problem. If I will change the 20-yrs. old...
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