On mine the bowl drops down....
My H34 has a 22 hp Yanmar - I thought that was the standard for H34s. I presume the 27hp is similar, and that you are talking about the Yanmar filter on the side of the engine. On the 22hp the bowl drops down, the top does not come off! There is a ridged ring at the top of the bowl that needs to be unscrewed. You may need to use a screwdriver as a drift and tap it with a hammer to loosen the thread. But be VERY careful - this is an alloy and not all that strong - tap lightly - it may pay to use a wooden drift. Use the inspection port on the side of the galley wall to gain better access to that area of the engine compartment. Keep a hand under the bowl to stop it falling and spilling fuel. The filter element simply pulls off a tube at the top. Once you've replaced the filter element and reinstalled the bowl, you'll have to reprime the engine. You should be able to use the lift pump on the fuel pump to do this. Loosen the bleed screw on the top of the filter housing and pump until fuel comes out, then tighten. Good luck. Derek
