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  1. W

    1965 Mercury 9.8 forward is reverse

    A freind of mine dropped off an old Mercury red band 9.8 short shaft and asked if I could get the lower unit back on and get it running. It runs badly but a carb clean should take care of that , it has a nice hot spark. The lower unit went on after fiddling with the shift shaft lining up. The...
  2. W

    Flywheel movement

    Seems to me to be bearings or connecting rod wear.
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    Compression on a 2010 MD90c ?

    I am going to do a compression test on this motor . If all cylinders are even what is acceptable and what approximately should it be ? Thanks.
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    Tohatsu MD90c2 oil pump question.

    I have heard good things about them . This one looks to be in fine condition, though the looks were deceiving. Only 5 or 6 hundred hours on it I am surprised by the issues it has. There is another post coming soon. I will cut the gasket and give it a go. Thank you.
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    Tohatsu MD90c2 oil pump question.

    Thank you for your reply. I may try to cut a gasket or purchase another used one. I already replaced one with a used one and it leaked. Luckily the seller gave a full refund. The replacement itself goes quickly, I figure you purged the air and changed the hoses. I did neither. I used the old...
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    Tohatsu MD90c2 oil pump question.

    It seems everything is taking longer than I think. And it hurts more also. That aside , I may be mistaken but I thought I saw someone mention putting a gasket on the top housing of the pump body as a remedy to its' leaking. As a certified T technician I realize this method would not be used, nor...
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    Tohatsu MD90c2 oil pump question.

    My oil pump appears to be leaking. The lines are secure but oil keeps appearing on the pump bracket. Is there a fix for the pump or only a replacement ?
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    Tohatsu ECU replacement

    The wires were connected. After testing the buzzer I found it unresponsive to 12 volts. I ordered a new one. For now I am running the horn wires external to the remote and hooked up to an old buzzer the old buzzard had in the shed. Today I shall recheck and reset the ECU. I appreciate your...
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    How to test warning horn in Tohatsu remote control

    I realize my manual is for the MD90B and mine is a MD90C2. I have been spending some study time on the schematics after putting in the new ECU. I wanted to make be certain I was not applying too much power as the yellow wire traces back to the tach and the ECU. I rigged a light bulb to the horn...
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    How to test warning horn in Tohatsu remote control

    I am trying to find out why my warning beeper or horn does not sound when I turn on the ignition. I also need it to sound in order to reset the ECU. I opened the Tohatsu OEM control box to gain access to the horn itself to see if I could make it sound. Does it run on a 12 volt signal from the...
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    Tohatsu ECU replacement

    As usualthe info is in the manual I just got anxious and missed it. Now I know it is there it will take some time to really understand what it is saying. i realize I need to reset the ECU and the TPS. So here is my new issue. As part of the procedure, wouldnt you know , part one,"Set the key...
  12. W

    Tohatsu ECU replacement

    Yup. It was catastrophic alright. Quite painful . I have seen ECUs in worse visual shape. It kills me that this one has such a small footprint of a burn. 2300 dollars and the issue may be 1 or 2 or a few more low dollar cost capacitors, diodes or whatever. Time to put it behind as now I...
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    Tohatsu ECU replacement

    All cylinders firing with new ECM. Took some pictures because when I spend money I want to remember why. This dripping goop is also on the crankcase. It did not come from above . I checked. I gather something heated up but good and blew out here. Any thoughts ?
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    What Force by merc lower unit will fit my 1985 150 Mercury

    Off hand IDK. Best to start a new thread on this question as you may catch the eye of someone who is more familiar. You can also look it up in the parts listings and do some cross checking.
  15. W

    1989 Mercury 70HP - Intermittent spark

    The black main harness plug leading to control box. Retest the trigger . Check your ignition switch and harness wires to it.
  16. W

    1989 Mercury 70HP - Intermittent spark

    Probably. The ol intermittent electronics failure. But also disconect the harness when you have no spark. Check ignition key switch, neutral safety, look for shorts or bad grounds. Do you also have the mecury tilt switch on the side of the block, if so disconnect it and try again. Sounds like...
  17. W

    Tohatsu ECU replacement

    I found an ECM for750. I hope it goes well. Thank you for your reply.
  18. W

    Automobile type engine stand for my outboard block ?

    My bigger concern was to crack the block at the bolt holes. My plan was to run a pressurized diesel oil mixture through the block from where the oil pump feeds into the block. I have the mid section off so that I can inspect and clean the oil pump and screen. All due to the gear disintegrating...
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    Automobile type engine stand for my outboard block ?

    I have a stable engine stand which I would like to put my 2006 Yamaha 150 HP 4 stroke powerhead on. These stands are and have been used for years by many mechanics and not so mechanics. When I look at my Yamaha block and where I would place the bolts I get the head scratcher question. Auto...
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    Tohatsu ECU replacement

    That's what I figured. Being as it is quite pricey I thought there could be a compatible alternative. I will continue my search for a. reasonably priced used one. Considering the price Is the motor worth the repair cost ?
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