I decided to replace the oil pump and the suction hose after an MS290 stopped oiling. It could be that just a loose drive spring that mates with the worm was all that is wrong. However, I ran into a major obstacle -- removing the suction hose. Hose removal has been an impossible mission. Check these two diagrams from the service manual:
The hole in the engine housing is so small that the grommet will not pass through it and thus cannot be pried up. That grommet kisses and affixes to the hole in the oil tank, not to the hole in the engine housing as shown in the first diagram. The short end of the suction hose attaches to the pickup body, correctly shown in the second diagram. Also, attaching the pickup body to the suction hose if the hose is already positioned in the tank looks to be another virtual impossibility. So, installation of a new hose and pickup body seems to be a huge challenge as well.
Has anybody else run into this and if so, how did you solve it?
The hole in the engine housing is so small that the grommet will not pass through it and thus cannot be pried up. That grommet kisses and affixes to the hole in the oil tank, not to the hole in the engine housing as shown in the first diagram. The short end of the suction hose attaches to the pickup body, correctly shown in the second diagram. Also, attaching the pickup body to the suction hose if the hose is already positioned in the tank looks to be another virtual impossibility. So, installation of a new hose and pickup body seems to be a huge challenge as well.
Has anybody else run into this and if so, how did you solve it?