Re: Water Getting in Top Cylinder Yamaha 40hp Twin

[joesnuffy]

Thanks interesting about the stern drives using the wasted spark and the backfiring. I ordered a bore scope off ebay that will allow me to look at the cylinders from the intake manifold side using my laptop as a monitor to see what if any damage occured when those screw heads on the reeds came loose. .
I can also look from the spark plug hole side to inspect cylinders but I did look at them when I had the head off and they looked good but I couldn’t see below the pistons that part of cylinder scouring might be before exhaust port. I will put piston at TDC and look from intake manifold side for that using this scope. This tool will come in real handy on a lot of motors and didn’t cost a whole lot around 17 bucks and will sure beat taking an engine apart to look. It has 2 mega pixel and might be something someone else here would be interested in so I will post it. You have to select the 8mm 2.0MP with 5 meters of cable which costs 16.99 It also works on an android phone but I use an I phone so I will just plug it into my laptop I keep in shed.

I will wait on this tool before putting replacement manifold and reeds on. They aren’t here yet so its a waiting game at this point. I will get started on cleaning grounds etc. I don’t think its the spark either but couldn’t hurt to check it out while I am waiting. It did have over 1/4 inch of spark jump per cylinder that’s a lot of spark but I didn’t try it with one plug still connected and I also have a meter with needle that registers strong and weak spark. I will use that to help me.

When I get the engine back together I will check engine timing at idle and WOT using the manual. I did not make any changes to the original timing of motor meaning the magneto linkages just pop off and I was very careful not to alter the original timing of engine. The engine was running like a champ when I got it all back together. The engine looked like a new one under the hood with very low hours so I thought the timing would be correct. When you say check TDC I not sure on what to do on that except put engine at tdc and make sure the pick up is just opening with an ohm meter at idle position full retard on magneto? or when butterflies just start to open? need some help on that. I know I re-did my buddies 1962 50hp Mercury and the points needed to just be opening when throttle butterflies started to open or engine would stall.

http://www.ebay.com/itm/2-in-1-6LED-And … 1952062759

Thanks again for help,

Joe

https://SecreLocal.com - - No Verify - Anonymous Adult Dating -