Hello everyone, first post here... Long time lurker. Please be gentle
I have an 88 90hp VRO that is bogging under load. While going through the regular diagnosis steps, I noticed that the timing advance lever sits about 1/2 to 3/4 or an inch from the stop at WOT.
This engine is new to me, ran great once and has been plagued with high load running problems ever since. I don't remember ever touching the high speed advance screw, but anything can happen.
I've searched high and low for the timing spec for this motor but can't find it. I don't have a repair manual yet, tho that looks to be a good idea with these motors.
I was hoping to use the reeves method to see how close/far the timing is to spec before I go any further into diagnosis and spending $$ on carb kits, cools etc.
Can anyone help me out with a spec for ignition timing at WOT so I can guestimate where I'm at?
A little bit of extra info is required as well... This motor started running like poo after a very bad tank of fuel was used by mistake. The carbs have been cleaned (not perfectly, just a quick job... I know, I know), plugs changed (with ngks and champs), fuel pump was changed in order to a unit from an 88spl so I could ditch the vro and the lines and fuel filters were replaced just as maintenance.
Hitting the choke smarten things up a bit, but the lack or power is still present.
So, as I mentioned...I don't think timing is going to be causing my issues... I'm more interested in checking for the sake of being thourogh.
Thanks so much,
-Aaron
I have an 88 90hp VRO that is bogging under load. While going through the regular diagnosis steps, I noticed that the timing advance lever sits about 1/2 to 3/4 or an inch from the stop at WOT.
This engine is new to me, ran great once and has been plagued with high load running problems ever since. I don't remember ever touching the high speed advance screw, but anything can happen.
I've searched high and low for the timing spec for this motor but can't find it. I don't have a repair manual yet, tho that looks to be a good idea with these motors.
I was hoping to use the reeves method to see how close/far the timing is to spec before I go any further into diagnosis and spending $$ on carb kits, cools etc.
Can anyone help me out with a spec for ignition timing at WOT so I can guestimate where I'm at?
A little bit of extra info is required as well... This motor started running like poo after a very bad tank of fuel was used by mistake. The carbs have been cleaned (not perfectly, just a quick job... I know, I know), plugs changed (with ngks and champs), fuel pump was changed in order to a unit from an 88spl so I could ditch the vro and the lines and fuel filters were replaced just as maintenance.
Hitting the choke smarten things up a bit, but the lack or power is still present.
So, as I mentioned...I don't think timing is going to be causing my issues... I'm more interested in checking for the sake of being thourogh.
Thanks so much,
-Aaron