1994 Johnson 150 performance

[bgreene]

Two questions:

1. Engine runs with "hiccup" or rough spot every several seconds or so at idle and forward idle.

Seems to run fine once revs are increased.

Is this likely a minor, or major issue ?

2. Compression test results 100 on one side, 95 on the other side.

Are these good numbers ?

[Gary Shallbetter]

OMC made low compression and high compression motors. You need to run your vin numbers to find out which motor you have. Even at that the numbers sound low.

[spectrout77]

Your engine is a low compression engine(looper). My '93 Ocean Pro did the same thing. Try changing the plug wires. Have you de-carboned your engine lately? The OMC 150 is a sweet running engine. They still manufacture this same motor(150 johnson). I plan on running mine for many more years. Tony

[Annie2]

quote:

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Originally posted by spectrout77


Your engine is a low compression engine(looper). My '93 Ocean Pro did the same thing. Try changing the plug wires. Have you de-carboned your engine lately? The OMC 150 is a sweet running engine. They still manufacture this same motor(150 johnson). I plan on running mine for many more years. Tony

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Saw the above post. What kind of performance #'s are you getting with the 150 on the 79 Mako 23? I am "still' trying to decide how much power I need for my 1979 Mako 23'?

Cruise @ ~4000rpms

WOT @ 5500 rpms

Thanks

Bobc

[spectrout77]

The 150 Ocean Pro will eventually make its way to my 18' Wellcraft. The only way I'd run a 150 on a '23 is if I have 2. My Mako is a project I havn't started...going to install a full transom. I currently have a '96 Sussuki 225[:x)] that I was going to use at first. I plan on going with a 250 or 300(if they make one) FICHT Evinrude. That should be all the power I need[]. Tony

[[email protected]]

Hello those 150 oceanpros are known for powerpacks everyone I know has replaced them

Good luck

Bwhaler 1984 254 mako 250 yami