first step is a compression test 89-40hp o/b evinrude

[mar t G]

89 evinrude 40hp o/b<br />BUT, i need to ask a few ?... 1st the tune up sequence has me starting with a comp test OK thats suppose to be easy right? i bought a very nice high end tester that we'll be working with.<br />so here goes.<br />CAN THIS TEST BE DONE WITH MUFFS??? <br /><br />warm engine FOR HOW LONG???<br />remove plugs and wires ground 1st wire to block connect gage to hole that 1st wire goes to. DO I GR. 2ND WIRE WHEN TESTING 2ND HOLE OR CAN I CHECK BOTH HOLES GROUNDING THE SAME WIRE??? <br /><br />now i need to make sure the throttle's held wide open. HOW DO I DO THIS???<br />from the control box or right from the engine.<br /><br />now if i'm using the muffs this is were i turn them back on and crank the engine over at least 4 compression strokes. RIGHT???<br /><br />HOW DO I TURN THE ENGINE OVER??? sense i've disabled the ignition system.<br />i have a remote starter but need to know how to hook it up before useing it.

 

[rayjay]

Re: first step is a compression test 89-40hp o/b evinrude

Hook one clip of the remote starter switch to the big red wire on the solenoid [ the wire coming from the batt. the other wire goes to the starter ]. Hook the other clip to the small terminal on the solenoid that is NOT grounded. You can look at the routeing of the smaller wires and figure it out. One goes to the ign sw and the other goes to ground.<br /><br />I don't disconnect anything, I just leave the ign sw in the off position. Pull both plugs and hit the remote start sw. You are not trying to crank the motor up, just spinning it with the starter. I don't worry about muffs when just doing a comp test.

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

ok so i wanna hook one clip to the big red terminal and the other one to the ignion terminal???web page

 

[Walker]

Re: first step is a compression test 89-40hp o/b evinrude

From you picture The top terminal with the red wires and the small terminal with the yellow wire.

 

[rayjay]

Re: first step is a compression test 89-40hp o/b evinrude

Most likely the upper big terminal and the upper little terminal. It looks like the lower smaller terminal has a black lead going to ground. Of the two bigger terminals, one goes to the batt and the other to the starter. Hook the remote starter sw to the batt terminal.

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

the directions that came with remote starter says to disconnect the yellow wire AKA the one marked with an (S). is that the only wire i need to disconnect?<br />THANK GUYS <br />BIG HELP <br />MAR T

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

ok i did the compression test and both read out even @ 125. now i know everyone says the numbers don't matter as much as the differance between them but 125 on a cold engine. ok guys tell me something here is this ok or what?

 

[ob15]

Re: first step is a compression test 89-40hp o/b evinrude

That sounds pretty good. That was with a cold motor. The numbers could increase if the engine was warm. I have an 89 50 & the comp was 135-140 with the motor warm.

 

[rodbolt]

Re: first step is a compression test 89-40hp o/b evinrude

dude your making the procedure to complex. on a two stroke as well as most anyother motor its actually several seperate motors connected by a common crank. I always do my spark test at the same time I do the compression test. saves steps. on a two stroke I do the test cold. no valve train on a two stroke. on a 4 strokes it will depend on how bad I am going to burn myself on hot manifolds. but your numbers look good. what the test is indicating is the sealing ability of the cylinder. its a decent test but not as accurate as a cyl leakage test. so what this test is showing is both cyl on the same crank are sealing about the same. thats a good thing. is this a routine tune up or is the motor broke? and remember the cooling system needs a tune up at the same time.

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

i'm trying to get it running better there's going to be an RPM's problem i just know it. running very sluggish and wont start in str8t up nuatral or go faster than 27 MPH where i had it at 33 last season. oh and just to let yea all know i checked both cyl 4 times for 6 seconds and got exactly the same reading every time so i'm happy with that BUT there's oil on the ground now WHY???<br />web page <br />STAY AFLOAT<br />MAR T

 

[ob15]

Re: first step is a compression test 89-40hp o/b evinrude

Could be from tuning the engine over without it running. Moving gas thru the motor & it has to go somewhere.

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

OK that's what i was hoping it was. SO THAT'S NOT A PROBLEM THEN? if not lets move on to the next sequence in the tune-up the SPARK PLUG SERVICE<br />MANUAL SAYS TO USE A CHAMPION QL78C2 W/0,030 GAP FOR NORMAL OP. OR CH.J6J or AC M44C to prevent wet fouling(which is a current problem)these plugs are used primarily @low speed.<br />BUT for sustained high speed on models 85-later it calls for a ch.ql78v or l78v (non adjustable gap) web page <br />i run the boat for fishing so i could run high for 4 miles to the other side of the lake then motor off and foot peddle trolling motor around. then motor up blast across lake to home or i could have the family in it going slow to the flats for 1/2 mile<br />stay afloat<br />MAR T

 

[ob15]

Re: first step is a compression test 89-40hp o/b evinrude

I'd use the QL78's.

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

STANDARD GAP THE QL78C2 OR NON ADJUSTABLE GAP QL78V

 

[ob15]

Re: first step is a compression test 89-40hp o/b evinrude

Sorry the standard C2's

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

OK so i'll gap the champion QL78C2's at 0.030 then we can move on to the next step in the tune-up process CHECKING THE LOWER UNIT & WATER PUMP<br />for this we move to clymer B732 chapter 9 GEARCASE i'll drain the lower unit replace with new oil and screws i'll also replace the impeller if all goes well there i'll be back to move on to the fuel system and all it's checks and balances<br />THANKS GREATLY FOR YOUR PATENCES <br />STAY AFLOAT<br />MAR T

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

OK so i'll gap the champion QL78C2's at 0.030 then we can move on to the next step in the tune-up process CHECKING THE LOWER UNIT & WATER PUMP<br />for this we move to clymer B732 chapter 9 GEARCASE i'll drain the lower unit replace with new oil and screws i'll also replace the impeller if all goes well there i'll be back to move on to the fuel system and all it's checks and balances<br />THANKS GREATLY FOR YOUR PATENCES <br />STAY AFLOAT<br />MAR T

 

[ob15]

Re: first step is a compression test 89-40hp o/b evinrude

If you are not sure when the water pump assembly has been replaced, I would change the whole thing, not just the impeller.<br /> <br />No need for new screws for the lower unit oil change, just new washers for the screws.<br /><br />Water pump & oil change shouldn't take but an hour or two. It's pretty easy.<br /><br />good luck

 

[mar t G]

Re: first step is a compression test 89-40hp o/b evinrude

here's the oil that i just drained no chunks of any kind so nothing's chewwed up but i don't recall the oil being blue???? <br /><br /> <br />

<br />and i would say the pumps not been changed in 2 or 3 years but sat for 2 of those years and only used for maybe 30 hours last season.<br />STAY AFLOAT<br />MAR T

 

[dajohnson53]

Re: first step is a compression test 89-40hp o/b evinrude

I can't think of anything that would turn the gear oil blue, so it must have been blue when you put it in? Do you have the container it came from or recall the brand? You're looking for evidence of water, and if it's not cloudy, you're looking good. Is the oil you're showing from the 30 hours of usage last year, or was it put in fresh before you put it away for the winter?