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    Evinrude V8 will not run with airbox installed

    Hi all! I have an Evinrude V8, been told that it should be a '90 300hp, but the identification plate is missing so I do not know for sure. It is setup with a Holley Blue fuel pump and regulator @ 5psi, feeding directly to the carbs (no overflow issues) and running premix. The carbs are...
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    Identifying a Evinrude V8

    Hi all! I have just bought an Evinrude V8. How can I indentify if this is a 250 or 300? The normal small alu plate with the "e300"letters" are gone. The heads looks to be marked 34079, maybe + a 7 at the end, if so, those heads are as far as I can find ?94 -> ?98 250 or 300 heads. Maybe a...
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    Evinrude & Johnson motor codes

    Hi all! On my 90, 150 and 275 they all have the J+horsepower etc and then the G"some numbers" below on the little round identification plate. I am aware of the introduces code. But, lately I have come across several motors that have only the G"numbers". Is this a serial number or something -...
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    Johnson V8 275 '88, some problems

    Re: Johnson V8 275 '88, some problems Ok, now we have some progress.. Started today looking for fuel leaks, so I took off the airbox, started the engine and after 10-20secs on idle it started to leak fuel out of the small "pipe" from one of the carburettors.. (See attached picture) So I...
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    Johnson V8 275 '88, some problems

    Re: Johnson V8 275 '88, some problems Thanks for that prop estimate. This may seem just basic stuff to you guys, but for someone like me that have no real experience in this, something new to learn everywhere it feels like.. Back to the drag created by the engine being mounted too low. 1) Just...
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    Johnson V8 275 '88, some problems

    Re: Johnson V8 275 '88, some problems Thanks guys. Nice to get some pointers - like the gear ratio - never thought about that, haven't seen any numbers or data on it but I guess this is different on the 150 v6 as well, so kind of hard to compare those as well. Now it easily turns 5700rpm, but...
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    Johnson V8 275 '88, some problems

    Re: Johnson V8 275 '88, some problems Ok, I will do that today. But, if I where to be wrong on the distance the cavitation plate is underneath the boat, and lets say it is 3" below. I did not measure it that exactly at the time of install. How would that effect the acceleration and top speed...
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    Johnson V8 275 '88, some problems

    Hi all. I have an V8 275 '88, at least that is what I am being told, an '88 mod. It had an servo pump and special steering assembly, but since I had an hydraulic setup on the boat that fitted the engine and were working, I took the original system off. Engine is installed on an Fletcher 21'...
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    '85 150hp vacuum hoses

    Hi everyone! I have an Johnson 150 V6 on which I have completely overhauled the powerhead. But, I have trouble starting it. It have run for a couple of minutes with the garden hose on, then I went to the sea, and when trying it in the water, nearly no luck starting it. It ran for 20sec, then...
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    Johnson 150 V6 1985 rebuild

    Hi all! I have an Johnson 150 V6 that started to run bad some weeks ago. 90 degree V6. It could cope with high rpm but would make very long time getting there and at all the wrong ignition advance values. Any more than 12-16deg it would not accelerate at all, and would not accept more than that...
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