This is a continuation of a topic I started on Feb 16. I have an '86 115 6cyl with one low cylinder. Received a couple recommendations for a decarb.<br /> Did the decarb (poured Sea Foam into a nearly vertical cylinder a couple times followed up with a dose of Quicksilver Power Tune). Took the motor out to the river to run the decarb stuff out. Motor seemed to be running a lot smoother. Ran it up the river about 2 miles - ran great. Then it cut off with kind of a clattering sound. I was able to get it restarted but it runs rough and clatters. We limped back to the dock. I pulled the plug out of the repaired cylinder and found aluminum deposits on it! When I first got the motor and pulled that plug I found the same stuff on the plug but figured it was some kind of 'liquid aluminum' stuff since the plug hole had a bad helicoil. Now I know why the helicoil was bad. Now I know why the hole was helicoiled in the first place - aluminum deposits! Hey Fouled Plug, I noticed in one of your other posts that you asked someone if there were aluminum deposits on the spark plug. What is this a sign of (other than major problems)?<br />I've rebuilt a couple car engines and dirt bike engines. Is dissassembly/reassembly of this motor possible for the home mechanic or are there a lot of special tool required? Is sleeving the bad cylinder a realistic fix for this motor?
<br /> Or get a rebuilt powerhead. iboat can fix you up with one.