To much smoke

[piggy]

I have a 1999 25hp johnson on a pontoon 1/2 open or faster on smoke. Slow down it will smoke. Appears worse at night or when its damp. Put on two new coils and new spark plug wires helped some. Using NKG BR7HS plugs. Will using a hotter plug help? Is it possible to have a leak in the exhaust so that the smoke don't go thur the prop but into the air ? Thanks for any help.

 

[kenmyfam]

Re: To much smoke

I would be running with Champion plugs.

 

[piggy]

Re: To much smoke

In a champion plug what # would you recomend hoter,colder or the same as was used before. Plug used before was a NKG BR7HS. Thanks for your help

 

[kenmyfam]

Re: To much smoke

In a champion plug what # would you recomend hoter,colder or the same as was used before. Plug used before was a NKG BR7HS. Thanks for your help

I do not know for that model but I am sure your auto parts store can cross reference the equivalent champion or your local marine outboard store will tell you on the phone.

 

[tx1961whaler]

Re: To much smoke

Spark Plugs:
20, 25, 28, 30 HP, 1978 - 2001, QL77JC4 or L78V or QL82C, Gap .030

http://continuouswave.com/whaler/reference/BRP_SparkPlugChart2007.pdf