1997 70hp Force spark plugs

[bsocia]

I'm trying to find a good replacement spark plug for my motor any ideas.

 

[GrindKore]

Re: 1997 70hp Force spark plugs

Take your existing spark plugs to your local NAPA store. They will help you order a correct replacement. It cost me just under $4 per spark plug.

 

[bsocia]

Re: 1997 70hp Force spark plugs

Thanks for the info. I have already done this and I'm not satisfied with the performance. I currently have champion plugs, and I'm trying to find a replacement for the originals if possible and I don't recall what the original plug was.

 

[GrindKore]

Re: 1997 70hp Force spark plugs

I'm not sure which brand I have to be honest. I have replaced mine as soon as I purchased my boat and motor with the identical looking surface gap type of plug.

What kind of performance problems are you experiencing? How do you know it is caused by spark plugs?

 

[bsocia]

Re: 1997 70hp Force spark plugs

I'm having problems getting the motor to start. sometimes I need to crank it over 10-12 times. I just purchased this motor, and I am planning on giving the motor a tune up this weekend. It may have something to do with the fuel filters. Not sure yet, but I just wanted to change plugs while I was at it to eliminate this being part of the problem. Also, the current plugs are the flat bottom style not your traditional plug, or at least not what I'm used to.

 

[Frank Acampora]

Re: 1997 70hp Force spark plugs

Don't go to bent electrode plugs unless you want to melt holes in the piston crowns. Stick with the surface gap electrodes. I think the Merc is L76V.

You can try NGK BUH or BUHX

Yeah, surface gap electrode plugs foul easily but they are also easy to clean and safer for your engine--live with it.

 

[bsocia]

Re: 1997 70hp Force spark plugs

Thanks for the information this should help me out.

 

[roscoe]

Re: 1997 70hp Force spark plugs

First you might want to identify your motor.
They did not make a 70 hp in 1997.
The 70 was made from 1991-1995.
Then they made a 75 hp from 96-99.