SPARK PLUGS FOR EVINRUDE

[freeboat]

I have a 1990 Evin 70horse. It has NGK plugs in it but I have noticed it doesn't quite run up to snuff, sometimes dies at idle when in the water. However; all else is great, filters, etc. So, I'm thinking although the plugs are new, NGK is not a good plug for this engine. Am I correct?<br />Thanks

 

[moderator1]

Re: SPARK PLUGS FOR EVINRUDE

I have combined the posts-mod1<br /><br />I just posted about plugs, but forgot about asking about my fuel tank. I have two metal fuel tanks (portable) on my Evinrude outboard. Do they need to be vented? I can't see where there is a vent anywhere on these cans. They are the standard 6 gal (i think) metal cans for this engine. They are on a Bass Tracker. It thought the vent was in the top of the cap, but there isn't one on these. <br /><br />Cal

 

[WillyBWright]

Re: SPARK PLUGS FOR EVINRUDE

You'll find people that swear by NGKs, and you'll find people that swear at them. They're just as good or just as bad as Champions. My own preference is to put NGKs in Japaneese motors, Champions in American motors. ACs in GMs, Autolites in Fords, Bosch in VWs. I sincerely doubt the NGKs are the cause of your problem as long as they are the recommended plugs for that motor.<br /><br />The vents on the metal tanks open automatically when you plug in the line.

 

[rickdb1boat]

Re: SPARK PLUGS FOR EVINRUDE

freeboat <br /><br />Yes, you are correct in assuming the NGK is not the plug for your engine. You need to run champion plugs in that motor for proper performance. QL77jc4 is what I run in my 91 70 HP rude with no problems and so should you. They just don't like NGK's!

 

[freeboat]

Re: SPARK PLUGS FOR EVINRUDE

Thanks ya'll....I looked it up in my Seloc....it does say use Champions as you recommended. I'm going to change them today. Also, I noticed the other day, when I loosened the gas cap on one of the tanks there was a lot of pressure that escaped, so maybe that thing on the cap that automatically vents, is stuck. I'll clean both tank caps...that should do the trick...thanks to all who replied. <br />Cal

 

[rickdb1boat]

Re: SPARK PLUGS FOR EVINRUDE

Definitly make sure the vent is opening. Should not build pressure in the tank as long as the vent is open. Gap plugs at .030, unless you do alot of trolling. Then gap at .040 for better firing and less fouling at low speeds. I have always(for many years) gapped mine at .040. no matter what. Better idle and no problems at all with fouling. Personally, I prefer the plastic tanks with the vent on top. Might want to invest in a couple..

 

[freeboat]

Re: SPARK PLUGS FOR EVINRUDE

You're right rick...bigger gap is better and so are the plastic fuel tanks. They are easier to keep clean anyways....Another question.<br /><br />These Seloc manuals are heck to follow for the right engine and stuff...For the life of me I can't find the info I need on my carbs. Seems they left it out of this book or I'm just having the early sat. morning brain farts. I'm trying to find the fuel filter<br /><br />Cal

 

[Cannon]

Re: SPARK PLUGS FOR EVINRUDE

You are not having a brain cramp. There is no fuel filter. If your engine is not oil injected there would be a small screen on the inlet to your fuel pump.

 

[freeboat]

Re: SPARK PLUGS FOR EVINRUDE

Heck...that makes sense....Mine is oil injected.<br />Thanks

 

[WillyBWright]

Re: SPARK PLUGS FOR EVINRUDE

The vent in the 6 gallon metal tanks is not in the cap. It's in the pick-up housing where the line connects. Pressure is absolutely normal. That won't stop fuel from drawing out of the tank. When the pressure turns to vacuum as the fuel is drawn, that's when the vent opens. Also when the pressure is excessive. These don't leak from simple movement like cheap plastic ones always do. I can't believe the USCG hasn't banned those for the fuel they leak, specifically Tempo and Chiltons, etc.<br /><br />Plastic tanks are crapola! When you close the vent, they expand and stretch like a balloon in the sun and heat. When they're cool, they pucker. The gas cap vents leak when the tank is full and the gas is sloshing around. There are good plastic tanks, specifically the factory Johnson/Evinrude tanks. But the cheap ones are pure crapola and you couldn't give me one.<br /><br />Also stay away from the cheapo aftermarket fuel line assemblys, specifically Attwood and Sierra, etc. They get rock hard in as little as a year. The factory assemblies last many years longer.

 

[freeboat]

Re: SPARK PLUGS FOR EVINRUDE

Thanks Willy. You are right about the plastic ones puckering and stuff. I had one a while back on an older boat...and when I filled it (not even all the way), it would swell and leak. I think I'll just stick with the two old metal ones I have. I have two 6 gallon evinrude ones. Was just thinking of replacing them with one 12 or 13 gallon. I have a 1990 Tracker 17' bass boat (aluminum).<br /><br />Thanks<br />Cal