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93 Johnson 150hp lost comp.
#9040308
06/17/13 12:49 AM
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Joined: Apr 2009
Posts: 1,039
Kid Chuckles
OP
Extreme Angler
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OP
Extreme Angler
Joined: Apr 2009
Posts: 1,039 |
93 model motor. Has 4 plugs so guess it has 4 cyl. Compression on one cyl. is down to 40psi and boat misses. Starts fine then misses seems to run fine at 1/2 to full throttle. But you have to use the choke to get it to take off without dying pushing it in give some throttle push again and get to moving and then it takes on off. What do i do? Is this a problem i can fix myself with the help of a good book. I figure it has broken rings if losing compression. But although i can fix about anything on a vehicle this is different. What do you fella's think. I have changed all fuel lined from the bulb up. Still does this. HELP HELP HELP PLEASE
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Re: 93 Johnson 150hp lost comp.
[Re: Kid Chuckles]
#9046666
06/18/13 10:06 PM
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Joined: Aug 2010
Posts: 137
stickerman
Outdoorsman
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Outdoorsman
Joined: Aug 2010
Posts: 137 |
Problem is the compression. Once you are able to get the rpm's up, that is covering up the miss. Eventually, it won't idle at all. Time for an overhaul. Not a good idea to do just one cylinder. If you are not a real good mechanic, than its best to have a pro do it.
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Re: 93 Johnson 150hp lost comp.
[Re: Kid Chuckles]
#9048358
06/19/13 01:19 PM
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Joined: Jun 2009
Posts: 978
Tony Maynard
Pro Angler
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Pro Angler
Joined: Jun 2009
Posts: 978 |
I've been around a lot of OMC brand 150's and up and never seen one with 4 cylinders they are a V-6 so are you sure it's a 150 or that it only has 4 cylinders? How many carbs does it have? a 4 cylinder will only have 2 and a V-6 will have 3.
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Re: 93 Johnson 150hp lost comp.
[Re: Kid Chuckles]
#9050651
06/20/13 12:57 AM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Their were 140hp 4 cylinder outboards then.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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