1976 55 Chrysler Plugs Fouled?

[bbrian017]

Hi there,

These are my plugs are they usable or fouled?

If I get new ones are they the same as these? Does this boat have the correct plugs?

NGK B7HS Japan

See images in folder here please, http://www.backlakefishing.com/boat/plugs/

I notice when I try and go the boat stutters and stalls... When I hit top speed she runs just fine, from what I can tell.

Thanks,

Brian

 

[wickware]

Please share some history:

1. Last tune-up including carb cleaning and adjusting?
2. Is your ignition equipped with points/condenser? If so, when were they last checked and serviced?
3. How much was the engine?s compression and last checked?
4. Do you use Stabil additive or etc and how long is it usually stored?

 

[jerryjerry05]

It looks like the one plug isn't firing as well as the other.
Like wickware said: Compression?
Spark test?
Any work done?
You have a manual?
Set the air screw at 1 and 1/2 turn out.
Then following the directions from the manual set the air screw.
If the motors sat for any length of time??? The low speed jet could be clogged??