78 75 Horsepower Johnson

[Mary Pittman]

It runs great in neutral when submerged in water but as soon as you put it in gear it dies. What could be the problem? Need help!

 

[joereeves]

Low idle: If the engine ran properly in the past and this problem has just surfaced, check the following first.

Compression: Should be in the range of 100+ and even on all cylinders. What are your readings?

Spark: With the spark plugs removed.... The spark should jump a 7/16" gap with a strong blue lightning like flame... a real SNAP! Does it? NOTE: The 7/16" gap is important, checking spark using the spark plugs is a waste of time.

If the two above areas are as they should be, the usual cause is fouled carburetors, in which case, clean and rebuild them.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:

http://shop.ebay.com/Joe_OMC32/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1