On my 87 Johnson 20hp/manual start,it is equipped with a manual primer on the engine.When i pull it out it is usually hard to pull and feels like its under vacuum.Sometimes when i pull it out it takes a couple pulls out before the resistance is felt.Is this normal?Is there a easy way to check if the primer is working properly?There is a fuel hose going from the carb bowl to the primer and n 2 smaller fuel lines going to the manifold and the other to the back of the carb.Thanks
