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    Can OMC fuel pumps be rebuilt?

    In my manuals it says that Johnson/Evinrude fuel pumps are not servicable. It states that if faulty, the fuel pump should be replaced as a unit.<br /><br />That's fair enough, but last year I managed to buy a fuel pump kit, containing new diaphram and gaskets, for my 1980 Johnson 55. Since...
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    Help needed with year of Yamaha 85.

    Hi<br />A friend has asked me to service his Yamaha 85 for him, but I need to know the year of the motor to get the parts. I've asked him to look for the serial/model number and he's come up with these,<br /><br />S114263<br /><br />9L-1785<br /><br />Do these mean anything to anyone?<br /><br...
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    Prop pitch and diameter. Confused, please help.

    I have a 11 3/4 X 17 prop on my Johnson 55, but I want to get my revs up a bit so I'm looking for a 15 pitch prop.<br /><br />So far I've only found 12 1/4 X 15 props and I've been told by local outboard mechanic that dropping down in pitch won't make the difference I need if I increase...
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    Parts catalogue question.

    Hi<br />I want to get a parts catalogue for my 1980 Johnson 55. The guy I bought my service manual from only has a parts catalogue for a 1978 Johnson 55 for sale. Is the 1978 the same as my 1980? <br /><br />NB: When I go to my local OMC dealer for parts, they always look in a 1979 parts...
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    Johnson 55. Only 4500 rpm at WOT.

    Hi<br />I ran my boat for the first time since fitting a tach and discovered that I'm only pulling 4500 rpm at WOT.<br /><br />It's a 17 ft cathederal hull boat, 1980 Johnson 55, 11 3/4 X 17 prop. Today it was fully loaded for fishing, ie, two adults, 2x anchors, full fuel tank and spare fuel...
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    The outcome; 1980 Johnson 55. Tach or rectifier problem?

    I fitted a new tachometer to day and got erratic readings. It is a Smiths Tach, (a good make, made in the U.K), made for outboards. I wired it to the plug in the control box.<br /><br />It seemed to work O.K at low revs, up to 2-3k, but when I increased the revs, the tach needle dropped first...
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    Pin contacts. OMC part No. 511469

    Hi<br />Is there an alternative to these plug in connector pins that can be used?<br /><br />I've bought the rubber connector which was reasonably priced, but the pins! :mad: the price they are asking for the pins is just ridiculous :eek: <br /><br />O.K, so it won't exactly break the...
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    Advice on setting up tach needed.

    Hi<br />I bought a tach for my 1980 Jonhson 55 today from a place that sells used boat bits. From pictures that I've seen, I think it may be a teleflex tach.<br /><br />The wiring seems pretty straight forward, although in my manual it says not to use any instrument with more than a 5 amp load...
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    Throttle & timing synch. Is this right?

    Hi<br />Johnson 55 1980. 55EL80C.<br /><br />When I push my throttle lever forward, the piece on the armature plate comes up against the stop long before the throttle is wide open. Is this what should happen?<br /><br />I thought that the timing advanced as the throttle opened and the two...
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    Hot alarm. Can you figure this one out?

    Hi<br />Can anyone figure this one out?, because I can't :confused: <br /><br />I fitted a new thermostat to my 1980 55 Johnson last week, and took my boat out today for the first time since fitting the new stat.<br /><br />From cold, the engine started and warmed up pretty quickly. I watched...
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    Johnson 55. Can this broken stud be welded?

    I've removed my head cover to replace thermostat, but one of the bolts broke in the cylinder head. The stud is almost flush with the head, as you can see from the picture. Can I get someone to mig weld a nut onto this so that I can remove it?<br /><br />A neighbour has a mig welder, but...
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    Running carbs out of petrol.

    I've read on this forum that you should never let your motor run out of petrol because the top carb runs out first and the top cylinder runs dry until the bottom carb runs out.<br /><br />Surely the two carbs should have the same amount of fuel in them when the fuel line is dis-connected, so in...
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    Johnson 55. Thermostat questions.

    I'm about to fit a new thermostat to my 1980 Johnson 55, but first of all I need to get some advice from the very knowledgeable people on this site. :) <br /><br />I decided to work on getting the head cover bolts loose yesterday. Out of 14, 13 came loose and one snapped :mad: . The 13...
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    De-carb question.

    Are there any visible signs which would tell me if a de-carb has cleaned my engine properly?<br /><br />I ran a can of OMC engine tuner through my carbs at a slightly high idle speed. The gave the carbs a good squirt each and shut the engine down to let it soak in. After 3 hours, I started the...
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    Idle jets.

    Hi, can somebody please help as I'm confused about what the idle jets in my carbs actually do.<br /><br />I have a 1980 Johnson 55. j55EL80C. I recently rebuilt my carbs, and I noticed that the idle jets were sized #48. In my manual, it says that the original jets were #45, but these caused a...
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    Stuck lower unit bolts.

    Hi<br />In a few weeks time, I'm going to overhaul the water pump on my engine. As I've read on here that some of the bolts can be a job to get out, today I tried them all to see if I would have problems when I come to drop the lower unit.<br /><br />The two bolts that hold the trim tab came...
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    Prop problem. Help needed please.

    Hi<br />My engine is a 1980 Johnson 55. J55EL80C<br /><br />My prop (11 3/4 X 17), has quite a lot of movement along the shaft. I can slide it back and forth about 3/8 of an inch.<br />I've taken it off and noticed that the rear thrust bushing is in place, but the front thrust washer is...
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    Yet another tach question.

    Hi<br />I'm running a 1980 Johnson 55 2 cylinder, on a 17ft tri-hull fishing boat that weighs about 1000lb, (don't know exact weight). My prop is a 11 3/4 X 17, but I don't know if this is the right prop because I don't have a tach fitted.<br /><br />Could anyone tell me which tacho I could use...
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    New and old ignition coils.

    I bought a new ignition coil today for my 1980 Johnson 55, 2 cylinder. It is to replace a coil that looked as though the potting material had began to melt, even though the engine runs O.K.<br /><br />The thing is, the new coil looks totally different to the old one. It is definately the right...
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    Building from scratch.

    Hi<br />I have the chance to aquire some boat moulds very cheap. They range from 10 ft tender, to 15 ft fishing boat with cuddy.<br /><br />Would it be worth my while attempting to build a small boat from scratch, or is this just too much for someone with limited experience.<br /><br />What are...
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