setting timing

[katbird]

is it possible to remove the prop and place motor in a drum to set timming?

 

[Spidybot]

Re: setting timing

Yes, it is possible to run the motor without a prop. If you have a big barrel you can have prop on as well (do NOT engage gear as it empty the barrel in no time). You could use muffs instead of a barrel (pretty noisy).<br /><br />A motor on muffs or in barrel with no load (in neutral or prop removed), should never be run above 'high idle' rpm.

 

[katbird]

Re: setting timing

I am talking about setting the timing and the manual says to put motor into forward gear to set the primary throttle pick-up. all I have is a 55 gal. drum cut down. I thought I might be able to take off the prop and put motor into gear and set timing. this motor is a 76 mercury 1150. I finally got it running thanks to clams and his distributor that he sent me. I tried muffs and the motor will idle but tries to run away and I noticed that the motor isn't charging but I want to get the timing set first.<br />thanks

 

[Spidybot]

Re: setting timing

The run-away issue is related to the lack of backpressure on the exhaust. Should be solved by running in a barrel.<br /><br />If you need to engange gear as described, removing the prop is way to go. Doing it with the prop would take a special tank (to allow water to circulate and keep it inside the tank) or a special test prop.

 

[rodbolt]

Re: setting timing

hello<br /> DO NOT REV THAT MOTOR WITH NO LOAD.<br /> they will toss rods.the figgue for timing at WOT is used with a dyno a test wheel or while running down river.<br /> however in the service manual there should be a procedure to set idle timing as well as timing at WOT. best I remember there is a method to do it without actually turning the motor to 5500. but dont just rev it no load to 5500.<br /> things have a tendancy to grow with no load.<br /> good luck and keep posting

 

[Hooty]

Re: setting timing

It can be timed on the trailer, in the water, with the prop on at 4000+ rpm. Back it into the water until the cavitation plate is a couple of inches below the water. Be sure boat is secured to the trailer. <br /><br />c/6<br />Hooty

 

[katbird]

Re: setting timing

I would like to be able to set the primary throttle pick-up timing which is between 4-6 degrees before I take it to the river to set the wot. seems like it would be dangerous to run down river with a timing light and two screws have to be loose and one is under the flywheel which will be turning. that why I thought running in a drum with no prop but I don't know how many rpms it will turn at 5 degrees. the manual says you must have the motor running and in forward gear.don't know if muffs will work to do this. I just don't like the muffs at all. motor will idle fine for about 5 seconds and then rev. wide open. maybe someone knows the trick to set the timing without running the motor.

 

[katbird]

Re: setting timing

I would like to be able to set the primary throttle pick-up timing which is between 4-6 degrees before I take it to the river to set the wot. seems like it would be dangerous to run down river with a timing light and two screws have to be loose and one is under the flywheel which will be turning. that why I thought running in a drum with no prop but I don't know how many rpms it will turn at 5 degrees. the manual says you must have the motor running and in forward gear.don't know if muffs will work to do this. I just don't like the muffs at all. motor will idle fine for about 5 seconds and then rev. wide open. maybe someone knows the trick to set the timing without running the motor.

 

[rodbolt]

Re: setting timing

hello<br /> you can get it close by removing the spark plugs and useing a spark tester such as the s-48. then set the dist where ya need it and check the timing at cranking speed.<br /> it will still need to be verified at WOT. whether you use a test wheel a dyno or have some one run it down the river. me I like test wheels I have a dyno and I will sometimes do it at 60 mph.<br /> just depends on what the situation calls for.<br />good luck and keep posting

 

[katbird]

Re: setting timing

rodbolt are you talking about using a spark tester with the ign. on and turning the dist. to get it to spark on #1 and then turn back right before the spark like on a car engine. if not please explain. I can rebuild a car engine blindfolded but 2 cycles are greek to me.