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Dave Neptune
Dave Neptune
Afourian MVP, Professor Emeritus
Last Activity: Yesterday, 09:02 PM
Joined: 01-20-2007
Location: Grove, Oklahoma
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  • The stalling you describe does indeed sound like fuel starvation which can be difficult to figure out unless you have a fuel pressure gage in the line as Al described.
    Did the problem manifest slowly as in 4 or 5 uses of the boat or all of a sudden? If cleaning the carb made no difference checking...
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  • The wire is actually going "from" the coil to the OPSS and when it closes the fuel pomp gets voltage to run.

    Dave Neptune
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  • Yes it will work. However the lead from the R terminal should go to the feed side of the OPSS to activate the fuel pump before the OPSS senses enough pressure to close as well as supplying full voltage if you elect to use a resistor. This will give a couple of seconds more for priming as it takes a...
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  • The oil pressure switch uses no current it is the "oil pressure" that closes the switch sending voltage to the pump. It is the "OPSS", oil pressure safety switch. If oil pressure is lost the fuel pump is shut down and you run out of fuel hopefully before any serious damage is done...
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  • You do not need a buss bar. The resistor is to control only the voltage going to the coil. The alt, fuel pump and Pertronx leads hook to one end of the resistor and ONLY the coil gets fed by the "resisted current/voltage" to keep the coil from overheating. I know that the Indigo unit comes...
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  • That does sound right. Just check the voltage once running once the batteries are charged. The voltage should be a minimum of 12v and can read at system voltage of 13.7 or so. It is a good idea to use a resistor to feed only the coil as some coils do not like the additional "dwell" of a 4...
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  • Having the injection point a bit further below the "high spot" will keep some of the spray away and be better for the valves. However it has little to do with the corrosion you see. Whenever you shut down the water will condense in the exhaust no matter what you do and it is mixed with the...
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  • It is better to have the injection point a bit further below than the rusted one shown. And probably not as the PO may of used an old nipple that was already rusted a bit. The exhaust as a general rule will rust out about every 5 years or so unless you use stainless steel.

    Dave Neptune...
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  • Pt II~~~if the bail falls back rapidly as you loose pressure you probably have a check valve in backwards, an easy mistake.

    Dave Neptune
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  • If you are getting no pressure when cranking the push rod that operated the pump may of fallen out without being noticed.
    Dave Neptune
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  • That is the fuel leaking back past the check valve. The important reading is what does it do when running? It should hang around 3~4 PSI unless you have the "long run" style like for the Cat 30 which will be around 6PSI. If you are getting more you may have the wrong spring on the diaphragm....
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  • Dave Neptune
    replied to Thread Locker for the gas lines?
    The Av grade is good and some prefer the Permatex #2. Just use less as just a smear is all it takes. Just keep most of it off of the first leading thread.

    I like using Highside Chemicals blue Line Lock. It is messy like the Av grade just a bit easier to use due to the handy tube applicator...
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  • Dave Neptune
    replied to Thread Locker for the gas lines?
    About the only place you use thread sealer is on a "tapered pipe fitting". The ones with a gasket use the gasket to seal the "seat". There should be no sealer used on the the carb inside or any where else.
    You should also cut the ends of hoses or replace any fuel line pulled...
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  • Dave Neptune
    Dave Neptune posted a Visitor Message for W2ET
    Bill, is the Forum still "being constructed"? And is there any sort of a suggestion box for additions?
    I am finding my way around but I do find it somewhat frustrating for checking in to see if a "thread" I'm following has been commented on. I really see this as problematic...
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  • The nut just locks the adjusting screw so if you hold the screw in place only the nut will will come off. If you are going through the trouble of resealing I recommend that you get the new style conical adjuster to replace the ball that is probably still there. The ball can be a bit problematic getting...
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  • Al, my son is a very serious off road camper and carries one. He has had it for many years and many starts for his vehicle and others. I spoke to him this morning regarding it and he still gives it great praise. And as a matter of fact at a site 100 miles off road last weekend he used it to start a...
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  • Graham, those plugs do not look fouled at all. From what I see the plugs are way to hot as there is no color on the ceramic inside the plug. I would recommend you go back to the stock plug or equivalent.. The dark color on the ground part indicates that the idle may be a bit rich and the looks from...
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  • Dave Neptune
    replied to My A4 in Ericson 35 sailboat
    RedDog, I actually tried the same prop on my E-35. It worked OK in the harbor or a very calm sea with little wind. But because it limited the RPM's so much I had very little power available when needed. I tried having it pitched back to 8 inches and that actually did little to help as I only gained...
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  • Unless the engine is burning a good deal of oil there is no reason to foul plugs unless something is off. As I recall the 437 plug is a bit hotter than stock. The timing could be a factor but not a big one. You say you advanced it one "notch", about how much is that? The condition of the spark...
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  • Yer right Al, I got it to work too after a bit of effort. No biggie.

    Are we going to have the emojis? I clicked on on but it did not show, I will try again here.

    Dave Neptune
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