Re: primer bulb
my bulb is vertical,It has worked fine for 6 months.I am ready to change filtr for the first time and it took forever to get the gas to the motor the first time thru maybe 8 ft of hose including under the cowl.or maybe i had a leak as i did use teflon tape on the threads for the fittings,oops.although I checked all connections well,a month or so later I saw the tape turn brown on one of the fittings,oops.I changed to paste. and retightened every clamp. cant remember if it was hard to prime the second time C R S.Makes sense it would push thru filter better than pull wbulb especially a cold 30 degree day and be easier to prime.also i mounted the filter to be level when floating so its tipped slightly on the trailer.if that matters.1st time I ended up removing filter mount and holding it 2 feet below the tank to finally get it primed. also hit the starter to get the pump to help!