Hello all, I hope that you might be able to help me with a problem that I have on my Honda BF 90 fitted to my mirrorcraft 1744 dual impact.
I bought this boat in may and had a great month of boating.... untill I went on a new lake following a friend that "knows" it.... well as you can imagine they hit a rock, and so did I.
Yes I know it sucks! Anyway the hit snapped my skeg off but nothing on my prop.
I had the skeg fixed and after putting it back in the water noticed that the engine was missing and running rough. Initially I suspected fuel but after pulling the spark plugs I noticed no 4 as having the porcelain broken and end "missing".
I tried cleaning it by removing all spark plugs and cranking the engine, also tried a thin hose taped to the vacuum cleaner (wife still upset!). Nothing came out so I installed new spark plug and started motor up. Started fine and then started running rough again.
I pulled the plugs and no 4 had the gap closed again.
I am ok with my hands and can fix most small issues (qualified as a diesel and motor mechanic a long time ago but have been tied to a desk for too long)
I have attached some photos of the spark plugs the first one is the initial one the second one is the new one fitted and idled.
I have tried a borescope but cant see much ( camera seems to be too big) and the compression gauge I do have do not fit this sparkplug thread size.
My questions are: is this a bent crank,spun bearing or something else? And can I fix this myself (where to go for parts and instructions?)
Also any helpful hints will appreciated as I am allready being asked by the wife why we bought a boat that now needs more money....
I bought this boat in may and had a great month of boating.... untill I went on a new lake following a friend that "knows" it.... well as you can imagine they hit a rock, and so did I.
Yes I know it sucks! Anyway the hit snapped my skeg off but nothing on my prop.
I had the skeg fixed and after putting it back in the water noticed that the engine was missing and running rough. Initially I suspected fuel but after pulling the spark plugs I noticed no 4 as having the porcelain broken and end "missing".
I tried cleaning it by removing all spark plugs and cranking the engine, also tried a thin hose taped to the vacuum cleaner (wife still upset!). Nothing came out so I installed new spark plug and started motor up. Started fine and then started running rough again.
I pulled the plugs and no 4 had the gap closed again.
I am ok with my hands and can fix most small issues (qualified as a diesel and motor mechanic a long time ago but have been tied to a desk for too long)
I have attached some photos of the spark plugs the first one is the initial one the second one is the new one fitted and idled.
I have tried a borescope but cant see much ( camera seems to be too big) and the compression gauge I do have do not fit this sparkplug thread size.
My questions are: is this a bent crank,spun bearing or something else? And can I fix this myself (where to go for parts and instructions?)
Also any helpful hints will appreciated as I am allready being asked by the wife why we bought a boat that now needs more money....