Classic AquaSport
Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: hydraulicane on November 25, 2015, 01:49:47 PM
-
just wondering, if a 59d jet(.059) or a 57d jet (.057) orifice how much difference
it will make in engine performance? It calls for either for my engine. I purchased
(4) 59d jets.
just asking.
Happy thanksgiving everyone be safe.
-
You will be fine with .059 jets. In 1985, OMC started changing carb designs on V4's for some reason. Some of it may have been due to oil companies were playing with octane boosters and fuel dispersants, it was a real mess, a huge problem with engines coking up from excessive carbon. Lots of warranty issues. I remember Shell gasoline was the worst, I believe they were actually mixing methanol in their fuel blends and it was destroying engines. The slightly richer jet will not effect your performance and you won't notice anything.
-
^^^^ This...As long as you have tstats in motor and it is running at proper temps.
-
^^^^ This...As long as you have tstats in motor and it is running at proper temps.
yeah futch, I just installed new tstat or vernatherm about 6-7 months ago
with new seals and all. I had my son install a new temp. guage. Not sure if
it's hooked up right because the indicator needle on the guage does not move!!
Haven't checked to make sure it'd hooked up right yet. is it possible he could
have crossed the wires? I'm not sure, I'll have to look at it this weekend.
-
Most temp gauges don't start respond until you get to about 140 degrees which is about 20 degrees above your normal operating temperature. The typical guage is designed for inboard marine engines that operate between 160-180 degrees. So the only protection you have besides the hot horn is if the gage starts to move beyond "C", throttle down and look for a problem. Also remember that your engine can pee fine out of the tell tail and still overheat if a thermostat stays closed in the cylinder heads because the tell tail water is ported out of the engine BEFORE the thermostats on your 140 Johnson. Your hot horn will give you at least 20 degrees of protection before any damage could occur. There is an easy test to check the temp sensors in the cylinder head and the hot horn. You have a sensor in each cylinder head. Pull back the sheath off of the connector wire leading to the head to expose the connecter and ground the connection to the cylinder head with the keyswitch turned on and the horn should sound. Do this for each cylinder head. If the horn sounds on each head, you're good to go.
-
Most temp gauges don't start respond until you get to about 140 degrees which is about 20 degrees above your normal operating temperature. The typical guage is designed for inboard marine engines that operate between 160-180 degrees. So the only protection you have besides the hot horn is if the gage starts to move beyond "C", throttle down and look for a problem. Also remember that your engine can pee fine out of the tell tail and still overheat if a thermostat stays closed in the cylinder heads because the tell tail water is ported out of the engine BEFORE the thermostats on your 140 Johnson. Your hot horn will give you at least 20 degrees of protection before any damage could occur. There is an easy test to check the temp sensors in the cylinder head and the hot horn. You have a sensor in each cylinder head. Pull back the sheath off of the connector wire leading to the head to expose the connecter and ground the connection to the cylinder head with the keyswitch turned on and the horn should sound. Do this for each cylinder head. If the horn sounds on each head, you're good to go.
thanks fitz,
will do this weekend. i'll post the results as soon as I do the test.
If the "hot" horn does not sonund. guess I need to install one? right?
Can I ask dumb question? Well I'm going to anyway.
where is the" hot" horn located? I obviously i have no clue.
as a matter of fact I don't even think there is a hot horn
on my vessel. :sign0085:
-
where is the" hot" horn located?
Poke your head up under the helm, inside the console. Peek around the binnacle control where it exits the dash from above.
In my 91 with a Yamaha, the ignition is separate from the binnacle. That's where the horn resides, adjacent to the key switch.
(http://i237.photobucket.com/albums/ff108/r-berlin/InstrumentPanel2.jpg) (http://s237.photobucket.com/user/r-berlin/media/InstrumentPanel2.jpg.html)
Note horn in upper right of photo.
If your key switch is not on the binnacle, you should see it there.
-
Thanks Capt. Bob
for the visual....I can confirm that I do not have
a hot horn. Well, guess it's time to get one.
any
suggestions as to what kind I should get? also
are they hard to install? I'm really not very electrical.
Thanks
Hydraulicane
-
Hydro,
Look closely, it's part of the wiring harness, somewhere adjacent to the key switch. It can be as small a 4 quarters stacked on top of one another (piezo style) to something the size of a hockey puck. It would be rare not to have one. Do the sensor test I described earlier and listen for the alarm. Look for a tan, purple and black wire between your keyswitch and harness going to the engine and look for this "puck".
-
thanks again fitz will do. This weekend.
I'll let you know the outcome.
Thanks again
Hydraulicane
P.s. anybody live on the treasure coast? calling it quits in
the working world, Moving to Fort Pierce around Jan. or Feb.
The wife and I want to move closer to the grand kids.
Happy Holidays to all be safe. :singing:
-
P.s. anybody live on the treasure coast? calling it quits in
the working world, Moving to Fort Pierce around Jan. or Feb.
The wife and I want to move closer to the grand kids.
Happy Holidays to all be safe. :singing:
Born n raised and not going anywhere!
-
P.s. anybody live on the treasure coast? calling it quits in
the working world, Moving to Fort Pierce around Jan. or Feb.
The wife and I want to move closer to the grand kids.
Happy Holidays to all be safe. :singing:
Born n raised and not going anywhere!
where are you at on the treasure coast?
hopefully, if everything goes right i'll be living
by the St. Lucie county int'l airport.
love that boat ramp on torpey road!!!!!!