problems

hrzracr23

Petty Officer 3rd Class
Joined
Aug 15, 2006
Messages
78
hey all, I would like to get my boat running for labor day. I ran the boat last september with no real problems. When I moved to coastal nc I garaged it at my parents house in ny. I just brought it down to my place in nc charged up the batteries put in new spark plugs it cranks but wont start. It has strong spark on all four plugs. I need a checklist, things that could be giving me trouble I dont have a compression guage but compression builds if you block the plug hole. By the way if it helps its a 79 evinrude 85hp v4 thanks for the help!
 

tx1961whaler

Vice Admiral
Joined
May 31, 2008
Messages
5,197
Re: problems

First thing is write so that somebody can understand you, if you really want help. An occasional period helps.

Anyway, enough lecture from the old fart who had writing beaten into him by demented old biddies, the first things to do are a spark test with a spark tester and a compression test. You rent or get loaned a compression gauge at an auto parts store. The spark tester is like 5 bucks.

Once you rule out the compression and spark as a cause, then all that is left is the fuel system. Make sure all of the gas tank vents are cleared and open, and make sure to pump up the primer bulb in the gas line. Take loose the gas line at a carb inlet, and pump the primer bulb an make sure gas squirts out.

If you have spark and compression, and gas to the carbs, then the carbs will most like need to be rebuilt.

For more things, see "Outboard Won't Start"
http://forums.iboats.com/showthread.php?t=158071

Good luck, but I might make alternate plans for Labor Day, just in case.
 

MrGED05

Seaman
Joined
Jul 25, 2008
Messages
50
Re: problems

A couple of other things to check before you spend serious money on anything:
Make sure the fuel filter and bowl are clean and without ANY water. If you have a "ceramic" type fuel filter, you can run it through your microwave to insure that it is not being obstructed by water. Otherwise just buy a new one, they're cheap.
Drain and replace any old fuel with new, fresh fuel.
Gently, ever so gently, tap the carb float bowl to insure that the float is free to move and allow fresh fuel into the engine.
Check fuel supply by going to full choke, going to WOT, priming the pump and crankning vigourously. Just put your nose in the area and take a good sniff and look, you'll know if you're getting fuel into the intake. If not, then you know what is your problem.
If it was running well when put up for storage, the ignition is most unlikely to be the source of your problem. Ignitions don't change from being stored. Fuel systems do, they build up varnish, clog, get sticky and develop strange ailments.
Note, running the engine "dry" on shut-down DOES NOT remove all the fuel from the intake systems, carb and such. That can only be done by disconnecting and using compressed air to blow out all the passages. In the future, use something like "Sea Foam" to shut down your engine.
Good luck, your fix should be really inexpensive.
Gary
 
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