HomeyClown
Cadet
- Joined
- Jul 5, 2021
- Messages
- 6
I got a 3.5 4 cycle mercury from a relative in a bag. The rod was broke in half. It must have been running synthetic when it went cause everything looked mint condition with the exception of evidence of HIGH heat, the shutoff hose bracket was melted and the impeller was very wasted.
well I replaced everything (rod, piston, rings, impeller kit, spark plug) with oem, tohatsu and put it back together. Runs like crap, the carb was nasty so I swapped with a chinese, same same so put the oem back on. I did a compression check, its 60, I read on this site there is a decompression thing but I certainly cannot see one. Runs like low compression. I put a leak back tester on it and it shows everything is pretty much fine, leakage is coming out of the oil fill which would be rings.
I am trying to figure out what direction to go now, do I walk away, do I buy a block,(perhaps cylinder warped due to heat) or do I buy a short block (cheaper than a total outboard but not by much). I really wanted to put this motor on my inflatable boat but I have to get it working first. Any suggestions would be awesome!
Here is a link to it running as good as it gets. no throttle control with two different carbs, old and new exactly the same. All I have to go on is the 60 psi compression check. Fuel is being gravity fed directly into the carb. Im thinking there could be some massive air leak somewhere but I certainly didnt see anything or extra hoses. The carb has two barbs on top but only one hose and that hose just dumps out the bottom of engine it looks. The pic of parts is the old parts showing heat damage, disregard drill, another project.
https://drive.google.com/file/d/1P7NtuUuoozOGfrDcekKYU6eCvJ6j_m8k/view?usp=sharing
well I replaced everything (rod, piston, rings, impeller kit, spark plug) with oem, tohatsu and put it back together. Runs like crap, the carb was nasty so I swapped with a chinese, same same so put the oem back on. I did a compression check, its 60, I read on this site there is a decompression thing but I certainly cannot see one. Runs like low compression. I put a leak back tester on it and it shows everything is pretty much fine, leakage is coming out of the oil fill which would be rings.
I am trying to figure out what direction to go now, do I walk away, do I buy a block,(perhaps cylinder warped due to heat) or do I buy a short block (cheaper than a total outboard but not by much). I really wanted to put this motor on my inflatable boat but I have to get it working first. Any suggestions would be awesome!
Here is a link to it running as good as it gets. no throttle control with two different carbs, old and new exactly the same. All I have to go on is the 60 psi compression check. Fuel is being gravity fed directly into the carb. Im thinking there could be some massive air leak somewhere but I certainly didnt see anything or extra hoses. The carb has two barbs on top but only one hose and that hose just dumps out the bottom of engine it looks. The pic of parts is the old parts showing heat damage, disregard drill, another project.
https://drive.google.com/file/d/1P7NtuUuoozOGfrDcekKYU6eCvJ6j_m8k/view?usp=sharing
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