Hello everyone. I have been reading this forum since I bought my boat a few years ago and it has been really helpful. Ive never posted before but I'm a little stuck and could use some advice.
My engine runs and I have done all recommended maintenance that I have seen on the site last 3 years. I have factory service manual and follow its specs. End of last year motor started running a little more rough than it had. Cutting out at idle and the sound of the motor at middle to WOT seems to change its sound/tone at times while running. No discernable change in power. This year I'm noticing gas/oil slick in the water behind the boat that Ive never noticed before. No gas leaks anywhere that I can find. Lower unit oil is perfect.. I have...
Rebuilt the carbs with new BRP kits.
New fuel filter
New Champion plugs
ran diagnostic on VRO as per manual all OK
Checked spark and got consistent 7/16 gap spark x4
Compression test #1 121 #2 123 #3 131 #4 122 (this was a change from last year as all were within 3 psi. It is still within 10 but it is a change. I do run OMC engine tuner 1x a year)
I was testing the timing light and I can see the engine jump every other second or two about 3 degrees on the flywheel that coincides with the rough running. I'm not sure if that is normal or not. After the timing is done Ill be at the end of what I know.
Maybe I shouldn't worry about it and just thank my lucky stars that it runs. I'm trying to make this engine last as long as I can cause I cant afford a new one so I'm always nervous that the thing is going to blow b/c I didn't do something. Its never been rebuilt and I have no idea how many hours are on it. No mechanic in my area wants to touch it. One mechanic quoted me 1000 dollars to rebuild the carbs just to get me off the phone and they all say..well its old what do you want?
Just got back from the lake. Checked the timing. Maximum spark advance was 1 degree off. Yes I sat in the back of the boat with it going full throttle. No adjustment made. Then I got to the idle timing and it was way off. Supposed to be 8 atdc it was 4 btdc. kept turning the idle timing screw in as per the manual. the motor increased rpm until the screw bottomed out. timing went to tdc and would go no further. I backed it out to the original local and called it a night. Still have an oil/gas trail in the water. Is my problem likely under the flywheel? Ill have to study up on the manual I don't know about the key (I have not checked it as I don't have the tools to pull the flywheel yet.. I hope its not rebuild time. I don't think I know enough to do it myself manual or not. Advice?
My engine runs and I have done all recommended maintenance that I have seen on the site last 3 years. I have factory service manual and follow its specs. End of last year motor started running a little more rough than it had. Cutting out at idle and the sound of the motor at middle to WOT seems to change its sound/tone at times while running. No discernable change in power. This year I'm noticing gas/oil slick in the water behind the boat that Ive never noticed before. No gas leaks anywhere that I can find. Lower unit oil is perfect.. I have...
Rebuilt the carbs with new BRP kits.
New fuel filter
New Champion plugs
ran diagnostic on VRO as per manual all OK
Checked spark and got consistent 7/16 gap spark x4
Compression test #1 121 #2 123 #3 131 #4 122 (this was a change from last year as all were within 3 psi. It is still within 10 but it is a change. I do run OMC engine tuner 1x a year)
I was testing the timing light and I can see the engine jump every other second or two about 3 degrees on the flywheel that coincides with the rough running. I'm not sure if that is normal or not. After the timing is done Ill be at the end of what I know.
Maybe I shouldn't worry about it and just thank my lucky stars that it runs. I'm trying to make this engine last as long as I can cause I cant afford a new one so I'm always nervous that the thing is going to blow b/c I didn't do something. Its never been rebuilt and I have no idea how many hours are on it. No mechanic in my area wants to touch it. One mechanic quoted me 1000 dollars to rebuild the carbs just to get me off the phone and they all say..well its old what do you want?
Just got back from the lake. Checked the timing. Maximum spark advance was 1 degree off. Yes I sat in the back of the boat with it going full throttle. No adjustment made. Then I got to the idle timing and it was way off. Supposed to be 8 atdc it was 4 btdc. kept turning the idle timing screw in as per the manual. the motor increased rpm until the screw bottomed out. timing went to tdc and would go no further. I backed it out to the original local and called it a night. Still have an oil/gas trail in the water. Is my problem likely under the flywheel? Ill have to study up on the manual I don't know about the key (I have not checked it as I don't have the tools to pull the flywheel yet.. I hope its not rebuild time. I don't think I know enough to do it myself manual or not. Advice?