1977 85 hp evinrude won't start

[HBF4]

I just purchased this motor, model # 85799. It turns over great, but it won't start, or even sputter. I checked the spark in all the plugs, that seems ok. I sprayed a little premix into the cylinder, still nothing. I checked the compression in all the cylinders #1=110psi,2=110psi,3=100psi,4=115psi. I have the warm up lever set to warm up, and I can see that the advance plate seems to be working. I haven't tried changing the plugs yet. Any ideas would be appreciated.

 

[Waterbugtoo]

Re: 1977 85 hp evinrude won't start

Compression is very borderline on ok. It should start regardless. Either not enough gas, or too much. Are the plugs wet?

 

[JB]

Re: 1977 85 hp evinrude won't start

Howdy, HBF.<br /><br />Did you spray premix into the carbs? That might make a differnce.<br /><br />If you have fuel, air, compression and spark (I would call your compression fine) you may have a timing problem.<br /><br />Pull your flywheel and check the key. It may have sheared allowing the timing to be way off.<br /><br />Good luck.

 

[HBF4]

Re: 1977 85 hp evinrude won't start

I'm going to pick up some new plugs today, and give it another go. I'll spray into the carb and see what happens. What's a quick way to check the timing? Should I put No. 1 piston at TDC and see where the timing mark is? The guy I bought it from says that it was running last year, and it looks like the motor was fogged, so I'm hoping it's just fouled plugs.

 

[93bronco]

Re: 1977 85 hp evinrude won't start

i have a 1978 manual if youd like i can scan and send you copies of the actual timing procedure.

 

[dkondelik]

Re: 1977 85 hp evinrude won't start

Sorry for being so obvious BUT,....<br />Are the plug wires in the correct locations?<br /><br />Good Luck<br />Have FUN!

 

[HBF4]

Re: 1977 85 hp evinrude won't start

I checked out the plug wires, they're in the right places. I'm going to pop off the flywheel this weekend, and check the timing. If that's alright, how can I check the power pack without any special tools? My friend says his evinrude had the same problem, and it had a spark, but they fixed the problem when they changed the power pack. I can't afford just to shotgun parts.

 

[chumbucket]

Re: 1977 85 hp evinrude won't start

JB, Meant to ask you was that gulf water or tap water you use on your de-carbing ???????????

 

[JB]

Re: 1977 85 hp evinrude won't start

Distilled water, Chumbucket, though in the past I used tap water.<br /><br />Water decarbing was very common in the 40s and 50s, even on cars. <br /><br />Now that bottled water costs more than premium gasoline, maybe it is cheaper to pay ten bux for a spray can of commercial decarber.

 

[HBF4]

Re: 1977 85 hp evinrude won't start

Good news. I got the thing running. Changed the plugs, sprayed a lot of premix in carbs, it started up for a couple of seconds, then I shut it down. Thanks for the help.