Mercury 150hk v6 twostroke bogging under load

[hansmerc]

Hello! first of all i need to try to find out model and year on my outboard since i cant find the serial number. i will post this in model/year forum too.

I need to now the aprox model so i can buy parts for it and i need som input to see if im right:

So the problem is, starts perfect, runs perfect at idle, i can also rev the engine in neutral. But when under load it either boggs down occasionally or all the time.
so what ive done:
-Cleaned carbs
-New fuel pump and checked hoses and everything
-new plugs
-new gas
-checked compression and its good and all cylinders.

Now im thinking its an ignition problem..

So im thinking about buying a new trigger and switch boxes.. any inputs here?

best Hans

 

[faztbullet]

Has oil injection been bypassed as oil tank on engine is empty! If you do not have the carb sync and linked correctly it will bogg

 

[hansmerc]

It is bypassed.. tried adjusting a littlebit , but problem is that i dont know what adjustment is right.. just been trying by how it looks 0-100% open.. and it looks correct from what im understanding

Has oil injection been bypassed as oil tank on engine is empty! If you do not have the carb sync and linked correctly it will bogg

 

[racerone]

Throwing parts at it can get expensive in a hurry.-----not sure if I would install those aftermarket parts.

 

[hansmerc]

Throwing parts at it can get expensive in a hurry.-----not sure if I would install those aftermarket parts.

Ok

 

[skialot2]

More likely the stator then the switch boxes

 

[racerone]

Post the actual compression numbers here.-----And does spark jump a gap of 3/8" or more on each of the 6 leads ?

 

[faztbullet]

Only use OEM, CDI, Serria or Prufrex switchboxes as other can cause engine damage

 

[hansmerc]

120

Post the actual compression numbers here.-----And does spark jump a gap of 3/8" or more on each of the 6 leads ?

120psi on all cylinders , how to check the gap ?

 

[hansmerc]

Aaand does anyone have a manual for it ? At least Ohm readings for coil, trigger , switch boxes ?

 

[Edchris177]

120

120psi on all cylinders , how to check the gap ?

Google “spark plug tester”, they’re cheap, or make one out of a couple prices of scrap wire attaches to a scrap of plywood.
if you buy one, get one you can adjust the gap & Spark lead goes into one end, other end clips to ground on motor.Then test each lead as advised.

 

[Edchris177]

Don’t buy one the “lights up”, you want to see the spark jumping the gap, or build one.