Backfired .....
01-09-2005 | 11:21 AM
#61
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From: Northeast,Fla
Re: Backfired .....
I got All the plugs our ...DAMN ..its hell being old .....fat too ... 
anyway .. #4 and #8 look a little wet ...and more carbon ...like they have not been firing consistantly ? I am going to run compression check today and go from there ....by the way this motor had NGKs BR6FS the starboard motor had Champions RV8C .. keep ya posted
anyway .. #4 and #8 look a little wet ...and more carbon ...like they have not been firing consistantly ? I am going to run compression check today and go from there ....by the way this motor had NGKs BR6FS the starboard motor had Champions RV8C .. keep ya posted
01-09-2005 | 01:56 PM
#62
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From: Northeast,Fla
Re: Backfired .....
Good news .....
8 170 7 170
6 168 5 168
4 168 3 165
2 168 1 168
So I will get new plugs ...... I installed new fuel filter .... Shop gave me some fuel additive by Mercruiser ....try it ? or go ahead and put new cap and rotor ?
8 170 7 170
6 168 5 168
4 168 3 165
2 168 1 168
So I will get new plugs ...... I installed new fuel filter .... Shop gave me some fuel additive by Mercruiser ....try it ? or go ahead and put new cap and rotor ?
01-09-2005 | 04:50 PM
#64
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From: ohio
Re: Backfired .....
How old are the plug wires? If stock, you might consider changing them too. A good (scary) way to check them is at night, very dark, no nearby lights, and a spray bottle of water (old fastastic bottle or something like that). While running, mist a little water around the wires and watch for lightning.
01-09-2005 | 05:37 PM
#65
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From: Northeast,Fla
Re: Backfired .....
got it all back together but didn't fire it off ....I cant remember if we put wires on the port motor last time we had it out ....I think we did ...june ...but I know even new set could have a bad wire ...Wires are better than old days and also ignition voltages are higher .....could be though ...I am happy about the compression though ....had enough valve issues in 04 .....
01-09-2005 | 06:08 PM
#66
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From: Deland, Florida
Re: Backfired .....
Originally Posted by formula31
How old are the plug wires? If stock, you might consider changing them too. A good (scary) way to check them is at night, very dark, no nearby lights, and a spray bottle of water (old fastastic bottle or something like that). While running, mist a little water around the wires and watch for lightning.
01-10-2005 | 08:30 PM
#69
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From: In the Mountains
Re: Backfired .....
Originally Posted by offthefront
went out about an hour late today .....did one WOT for about 1-2 mins ...no backfire .....maybe we got it ...maybe we didint .... 
(sheesh, I'm starting to sound like Cuda)
Last edited by Formula Outlaw; 01-11-2005 at 04:01 PM.
01-11-2005 | 09:53 AM
#70
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From: 29°50'49.74"N 95° 5'17.55"W.......TEXAS
Re: Backfired .....
Originally Posted by offthefront
Took the boat out today for some test runs ...Put Teressa in with the motors and made a few WOT runs .... Port motor ....it is thru the carb ...you have to be at 4900-5000 for a cpl of mins and pop ..... So i guess start swapping stuff out ... gona do Filters ,Cap and rotor ....see what happens ...This is sorta good news as this is the older of the 2 motors ..< 50hrs ... Starboard has about 10 or so ... There is another isssue with this motor ....burns or sumthin about 1/2 quart an hour ....it was full when we started and now shows about 2 quarts low ...we put between 4-5 hours ...This same motor got water in it this past summer and we pulled it ..had heads checked and valves done ...has new gil manifolds with Stainless marine pipes .... there are no leaks that I know of ..
Before you get too involved, check the fuel filter water separators. A few drops of water will cause a stumble or backfire at WOT.
Good luck
