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    Fuel priming Yamaha F70A

    If I run my Yamaha F70A completely out of fuel by mistake is it a case of refuelling and pumping the primer bulb to restart the engine? The motor is running fine. I don?t have any experience with the new fuel injected 4 strokes to know if there is a more involved priming procedure. I have...
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    1994 120 HP rebuild. Now I'm scared.

    Re: 1994 120 HP rebuild. Now I'm scared. This is the only shot I have of the linkages. Hopefully it is of some help. My 1998 75hp idle setting was 8 degrees BTDC and at WOT it was 30 Degrees BTDC (dynamic), 32 degrees BTDC (Static). This was printed on a sticker ontop of the block and also...
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    Yamaha F70 owners.

    I am thinking of purchasing one of these motors to repower my boat. I would like to know what people thinks of the motor. Thanks TwoFish
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    R.I.P 1998 75 Force

    I?ve decided to call it quits on this motor. The cost of the parts, the gymnastics in trying to purchase the parts and having them shipped from the states. Also my lack of experience with rebuilding power heads had me a bit nervous about how the project would finish up. My wife has been trying...
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    Pistons for a 1998 75 Force

    Looks like I need a rebore and new pistons for my 1998 75 hp Force. The bore was quite worn although not damaged or grooved. It had a substantial lip at the top which is too large to remove with a hone. I’ve looked around and have found a couple of places selling Wiseco pistons. One listed the...
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    Rings to 1998 75 Force

    I have the Powerhead off my 1998 75 Force and would like your thoughts on whether it is worth fitting a new set of rings whilst motor is off. The compression is 140 even with a weak starter and bent reeds. The motor has done 220 hours. The rest of the motor is in good condition. I don't have...
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    Front engine mount 1998 75 Force

    One thing leads to another when working on older outboards. I have the power head off my 1998 75 Force sorting out some problems and I have just noticed the forward engine mount is broken (#6 in the diagram). The plates that attach to the engine and the lower cowl have detached from the central...
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    Show me you?re Torque Wrenches

    It looks like my motor is repairable (Allan key bolt thread) so the next step is getting things ready to reassemble the motor when I get it back from the engineers. My current torque wrench is a cheapy and only reads Foot/Lbs from 28 – 150. From what I can see in the manual the exhaust cover...
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    Allan key bolt 1998 75 Force

    I may need to take the powerhead off my motor this weekend. 1998 75 Force. One of the bolts has and Allan key top to it. Can I use a normal allan key to remove it or is there a special type of allan key socket tool I need to use?
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    Exhaust cover bolt 1998 75 Force

    I?m trying to remove the exhaust bolts in my 1998 75 force. Some of them have come out easily but others seem extremely corroded. The motor has been run in salt water. I have already snapped one bolt off level with the block. I have read other posts that say they have had to work at the bolts...
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    Reeds 1998 75 Force

    1998 75 Force. Still looking for the cause of the miss at idle. Removed the reeds to check their condition and noticed what looks like a small tear in the inner gasket between no.1 and no 2 reed blocks. The close-up photo shows a recessed area in the adaptor plate which looks like it would be...
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    Missing tooth on flywheel

    Is it possible to build up a broken tooth on a flywheel? Has anyone tried this? Thanks TwoFish
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    Check valves and rough idle. 1998 75 hp

    Checked the recirculation system and found two of the check valve were not closing properly. They were not blocked but just not closing fully. Cleaned them with carb cleaner but still not working. I?ve been chasing a rough idling problem for a while. I have my fingers crossed that this is the...
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    Starter pinion gear.

    I’m having starter problems and have eliminated every thing I can think of. 1988 75 p force. Voltage drop test. Cleaned starter checked brushes. New solenoid. (separate issue). Battery. The starter engages ok but does not stay engaged very long. I checked the pinion gear by placing a...
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    1998 75 hp Force Missing and rough idle.

    I’m having a problem with the motor missing. It is more noticeable when cold and is enough to stall the motor at times. At idle the motor increases revs then misses, slows down and starts the cycle over again. It seems to run ok at speed. What I’ve tried so far. Link and sync. Cleaned carb...
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    1967 20hp chrysler: Running too rich im out of ideas, any advice?

    Re: 1967 20hp chrysler: Running too rich im out of ideas, any advice? Yes there is a metal tab on the float. The carb needs to be inverted to set the float so the carb needs to come off unfortunately. I saw a post by another member “Jiggz” who had a quick way of checking whether the float...
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    1967 20hp chrysler: Running too rich im out of ideas, any advice?

    Re: 1967 20hp chrysler: Running too rich im out of ideas, any advice? Jerry, by the time I had written this you had answered it but I'll put it up anyway. Cheers I could only find a diagram of a later model carb with a good diagram (1982). The float mechanism consists of 4 main parts. The...
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    1967 20hp chrysler: Running too rich im out of ideas, any advice?

    Re: 1967 20hp chrysler: Running too rich im out of ideas, any advice? The float system in the carb is not working for some reason. Worn needle, float stuck or float not floating for some reason. Something stuck in the needle and seat preventing it from closing. Try pumping the primer bulb...
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    1998 Force 75

    Re: 1998 Force 75 I can't help you with the trigger readings but I'm following it with interest. I would like to test my coils and stator but don’t know how. Attached a photo of the plugs from my motor. Top plug has always been lighter than the bottom plug. Local mechanic said it was normal...
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    Force 50 starting problem

    Re: Force 50 starting problem A couple of quick tests. Jumping A to B bypasses the solenoid and checks the main wires from the battery and the starter. Jumping from A to C checks the solenoid is working as well. If the first test works but the second doesn't you have a faulty solenoid or...
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