Sparky problem

[ahm]

My 1989 Merc 80hp 3 cyl came to me from its previous owner with NGK BUZHW-2 plugs fitted. These, I am told, are high resistance plugs.<br /><br />I have had problems starting the engine when warm. I have reverted to BUHW-2's but have yet been able to test the engine. Would this make any difference?<br /><br />Why would the previous owner wish to use these high resistance (and expensive) plugs when the recommended plugs are BUHW-2. (I am assuming this was deliberate rather than a mistake.)<br /><br />Anyone got any views ??

 

[Bear]

Re: Sparky problem

ahm,<br />You posted this yesterday. I answered the best I could. Did you read it? You didn't post any reply. <br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=25;t=000241 <br /><br />Today you post almost the same questions again as a new topic. <br />Why don't you post the previos owners phone number and I'll give him a call. If he tells me why he made this choice I'll let you know.

 

[ahm]

Re: Sparky problem

Thanks Bear but I was hoping for more responses. You repeated what I had already said I knew ie the recommended plug was BUHW-2. You puzzled me slightly when you said the alternative quoted was the BUZHW-2 which is not quoted in the handbook or the service manual for this engine.<br /><br />I still want to know the practical difference between the two plug types and the effect on the engine operation.<br /><br />Thanks for your response though, I wasn't ignoring you. My apologies if you thought I was.

 

[ahm]

Re: Sparky problem

Sorry folks to have to nudge my question up the list, but I was hoping for some of you spark plug experts out there to be able to help me. I have written to NGK but they have yet to reply to me.