Vernon Edwards
Member
Hi,
I recently purchased a pair of GTX 155's less than 20 hrs. Before I put them in the water I run them & one of them I couldn't get it to crank. It was late at night & my wife got a bit confused with my instructions about when to turn the water on & I (she) may have flooded the engine, for sure there was water inside.
I pulled the plugs & cranked it several times until no water came out. I changed the milky oil 3 times let it dry a bit & then ran it on the trailer. It fired up immediately & ran smooth so I put it in the river after a quick check to ensure that the oil was still clean.
It started to misfire as soon as I got over about 3000 rpm so I pulled the ski out of the water & found the oil to be milky again. I did a compression test 160, 45, 160 rrrrrr. So I started to pull the head off. When taking of the intake manifold I discovered water in the intake but not on the middle cylinder where I had low compression.
In the process of taking the cam chain off I dropped a bolt into the engine which I could not retrieve so I pulled the engine. I discovered that the engine block & the front engine cover very badly corroded & the coating coming off in large flakes. Most of the bolt heads badly corroded. Just as well I pulled it. Looks like it was partly submerged in salt water & never cleaned. I'll tidy all that up & make it look like new again. I have some questions.
1. When I got the head off I could see no visible damage. All the valves seemed to be seating well so the low compression is a mystery. I used a flexible hose screwed into the plug socket by had & as it's hard to get tight I wonder if I had a bad seal? When I saw the compression so low I didn't want to crank too much more as I was sure I had bent valves.
2. Is it possible that that water still in the intake was causing the misfire rather then a messed up engine?
3. Should I bead blast the crankcase to remove all the old coating?
4. What paint should I use on the block?
5. I need nearly every single bolt on the outside of the engine replaced. I stopped when my shopping cart got to over $350 of bolts,... Can I use bolts from specbolt or the likes? some of their bolts
are 10 for $3.60 that are $3 ea as an OEM part. I do not mean the head bolts I will use OEM or good aftermarket for the head.
Thanks
Vernon
I recently purchased a pair of GTX 155's less than 20 hrs. Before I put them in the water I run them & one of them I couldn't get it to crank. It was late at night & my wife got a bit confused with my instructions about when to turn the water on & I (she) may have flooded the engine, for sure there was water inside.
I pulled the plugs & cranked it several times until no water came out. I changed the milky oil 3 times let it dry a bit & then ran it on the trailer. It fired up immediately & ran smooth so I put it in the river after a quick check to ensure that the oil was still clean.
It started to misfire as soon as I got over about 3000 rpm so I pulled the ski out of the water & found the oil to be milky again. I did a compression test 160, 45, 160 rrrrrr. So I started to pull the head off. When taking of the intake manifold I discovered water in the intake but not on the middle cylinder where I had low compression.
In the process of taking the cam chain off I dropped a bolt into the engine which I could not retrieve so I pulled the engine. I discovered that the engine block & the front engine cover very badly corroded & the coating coming off in large flakes. Most of the bolt heads badly corroded. Just as well I pulled it. Looks like it was partly submerged in salt water & never cleaned. I'll tidy all that up & make it look like new again. I have some questions.
1. When I got the head off I could see no visible damage. All the valves seemed to be seating well so the low compression is a mystery. I used a flexible hose screwed into the plug socket by had & as it's hard to get tight I wonder if I had a bad seal? When I saw the compression so low I didn't want to crank too much more as I was sure I had bent valves.
2. Is it possible that that water still in the intake was causing the misfire rather then a messed up engine?
3. Should I bead blast the crankcase to remove all the old coating?
4. What paint should I use on the block?
5. I need nearly every single bolt on the outside of the engine replaced. I stopped when my shopping cart got to over $350 of bolts,... Can I use bolts from specbolt or the likes? some of their bolts
are 10 for $3.60 that are $3 ea as an OEM part. I do not mean the head bolts I will use OEM or good aftermarket for the head. Thanks
Vernon
