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    Only one gas tank works. 79 OMC 120

    Hey guys! Me again! Not sure if I should be posting in this forum or another but... Not a pending issue as one does work; only one of my Chieftains Gas tanks work. I have a toggle switch for the tanks at the helm. I am not sure how this works, what parts to get ect. The bad tank is full but...
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    Idle adjustment 1979 OMC 120

    Here I am again. I am adjusting my idle on my 1979 120. Two things are happening: 1-The idle adjustment screw stop...technical term...seems to be loose. I tightened the screw that holds it in place but it still has movement. The movement is such that if I were to put a washer on it, it would...
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    Tight shifting from neutral to forward or reverse, 1979 OMC 120

    When shifting from either neutral to forward, neutral to reverse, or back to neutral from either direction; I have difficulty. I must essentially slam it into forward, reverse or neutral, causing the RPMs to spike. The shifter is very stiff when in gear. I pop it into the neutral position and...
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    1979 OMC 4 cyl carb kit?

    I have a model number 990243, 1979 OMC 4 cyl. I have been looking at carb kits all day and I just do want to get the wrong one. Any one have an Idea what part number I am looking for? Thanks in advance Jason PS: Only slight restoration this year, Next winter will be the big undertaking. I...
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    1979 OMC trim motor part number

    I have a 1979 omc cobra model# 990243s. When I hit the trim, the motor just clicks. I have been looking to find a motor but can not seem to find the part number. Thank you in advance, Jason
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    1979 OMC 120 oil change

    So I have the motor starting with the key now...phew! No screwdriver required...yet! Easy fix and no $$$ needed! :D Now its time to start the tune up! I see that there is a dipstick like tube with a cap that says drain on it, located next to the oil dipstick. Saying so I cannot get a pan under...
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    1979? omc 4cyl stern drive spark gap and starter question

    As the title states I have, what is believed to be, 1979 OMC cobra 4 cyl, model number 990243s. I need to know the proper spark plug gap. Just picked the boat up so there will be more questions to come... but, while I have your attention, I also need to know the proper name and part number if...
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    not going fast with ppl on my boat.

    So this is an additional thread from a outboard johnson thread. My boat is having trouble planing out with more then two ppl on it. I realize the there are many underlying issues that I need to take care of. What I want to know is, if I want an over heavy boat to move faster and plane out...
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    76 johnson 135

    Just got it tuned. Everything is working fine. With one person on it it goes 30. With 2 ppl on it it goes 27 with 3 ppl on it it goes 15 with 4 ppl it goes 7. Tried the tilt, was not working, helped a little...about 3 MPH. I was thinking prop, any suggestions?
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    impeller for rough 1976 johnson 135

    Looking for an impeller for this rough 76' 135hp johnson. cannot seem to find one everything ends at 1975 for the135hp. are they the same impeller? even on iboats they stop at 1975 but have other parts for the 1976 model? odd ~may be in too deep
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    1976 johnson 135

    Just got a 76 johnson 135. Rough shape. It will try to start but seems like there is no spark. It has 4 separate coils so i doubted that they are all bad. Everything seems to be in good working order it just wont turn over. Please help.
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    94 sedoo slt oil question

    I just got an 94 seadoo slt 750. I have 2 questions. 1 What oil do I use? Nothing has been done with the oil pump yet. 2 if and when i do plug the pump, what mix ratio oil/gas do i use? Thanx Jason
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