1986 90hp Tower of Power has intermittent miss

Doorknocker1

Cadet
Joined
Oct 18, 2020
Messages
10
My engine seems to have an intermittent miss. At times it runs perfect with lots of power then it will bog and lose power and 5-8 MPH.. carbs & fuel pump rebuilt. Previous owner said stator was replaced. Starts hard when cold but once running just a bump of the key will light it up. I burn Quick Silver synthetic oil with 100% gasoline. Any help would be appreciated
 

katch_me

Cadet
Joined
Aug 25, 2019
Messages
23
I have the same motor. I have had that bogging issue like you described. My problem was with the primer bulb. Seemed like maybe the check valve was weak. My carb and pump were rebuilt too. When the motor bogs pump the primer bulb. If it picks up power then that should be it.
 

Doorknocker1

Cadet
Joined
Oct 18, 2020
Messages
10
I have the same motor. I have had that bogging issue like you described. My problem was with the primer bulb. Seemed like maybe the check valve was weak. My carb and pump were rebuilt too. When the motor bogs pump the primer bulb. If it picks up power then that should be it.
Thanks, I’ll try it.. but the fuel line and bulb are less than 2 months old
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
36,031
Open low speed mixture screws 1/8th turn at a time and test run.-----Also test run on another portable fuel tank.
 
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