Johnson Seahorse TN28 Timing off?

[wedgie]

quote mikele86:

quote Jeff Register:

How about the points cam? Can it be flipped & out of time? Check those new coils as the soldered connection for the high voltage wires or does the 28 take the universal coil?

Got new plugs J6C Champions. Set the timing right to gap at .02 when piston is at the top on each cylinder… still nothing. Can’t even get the engine to cough after spraying fluid into both cylinders. It seems to me I’m not getting spark when put back into the cylinder. 😥

Is it possible for the cam to be flipped? I did replace the piston rings, is it possible I could of installed the pistons backwards somehow?

This is starting to drive me nuts 😐

I’ve never had a tn apart, but I know on other OMC motors it is possible to install the pistons backwards. The longer slope of the dome is the exhaust side. I will see if I can find a picture .

[elgin2]

Plug wires? I had sporatic spark and found the spring inside the sparkplug boot had a bad connection.

[retiredoz]

My parts manual does show a domed piston, so I think Wedgie is on to something…

[The Boat House]

quote mikele86:

quote Jeff Register:

How about the points cam? Can it be flipped & out of time? Check those new coils as the soldered connection for the high voltage wires or does the 28 take the universal coil?

Got new plugs J6C Champions. Set the timing right to gap at .02 when piston is at the top on each cylinder… still nothing. Can’t even get the engine to cough after spraying fluid into both cylinders. It seems to me I’m not getting spark when put back into the cylinder. 😥

Is it possible for the cam to be flipped? I did replace the piston rings,
is it possible I could of installed the pistons backwards somehow?

This is starting to drive me nuts 😐

[mikele86]

pistons are in the correct way

[Buccaneer]

Wheeeeew… that’s always a relief!
Been there, done that!

Prepare to be boarded!

[Author]

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