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Hello all, first post for me!
I just bought a 1985 Stratos 18' b*** boat with a xp150 on it. I bought it for a good deal, knowing it needs work. The motor starts easy, runs smooth for a few seconds, and then dies. After a few seconds, it will restart easy, and quit after a few seconds. This is repeatable both with muffs in the yard, and with the boat in the lake.
I am an aviation and car motor head, and am going to do a few things to this motor anyway. New QL77JC4 plugs, check all the coils, check the power packs, stator, and rectifiers, decarb, and clean/sync carbs for sure. I am wondering, if this start and stop symptom is the motor sensing no oil pressure? Isn't there a switch that only closes (to permit motor operation) after detecting oil pressure? So, it could either be this switch, or, there IS NO OIL PRESSURE, which I would guess would indicate the VRO pump? Thinking "out loud"
The fuel bulb is hard, as is the oil bulb from the VRO tank. As a note, I am considering eliminating the oil side of the VRO and just mixing my gas. Unless someone can convince me otherwise. As another note, the top two coils have a little cracking in the potting material, and the guy I bought it from had the surface gap plugs in it which I know little about. I bought a set of the QL77JC4 plugs because that is what the engine calls for.
Have any of you seen these symptoms before? Easy start, idle smooth(ish) for a few seconds, then quit? There isn't a lot of smoke, the water pump is working, and it's very repeatable.
Thanks,
Gregg
I just bought a 1985 Stratos 18' b*** boat with a xp150 on it. I bought it for a good deal, knowing it needs work. The motor starts easy, runs smooth for a few seconds, and then dies. After a few seconds, it will restart easy, and quit after a few seconds. This is repeatable both with muffs in the yard, and with the boat in the lake.
I am an aviation and car motor head, and am going to do a few things to this motor anyway. New QL77JC4 plugs, check all the coils, check the power packs, stator, and rectifiers, decarb, and clean/sync carbs for sure. I am wondering, if this start and stop symptom is the motor sensing no oil pressure? Isn't there a switch that only closes (to permit motor operation) after detecting oil pressure? So, it could either be this switch, or, there IS NO OIL PRESSURE, which I would guess would indicate the VRO pump? Thinking "out loud"
The fuel bulb is hard, as is the oil bulb from the VRO tank. As a note, I am considering eliminating the oil side of the VRO and just mixing my gas. Unless someone can convince me otherwise. As another note, the top two coils have a little cracking in the potting material, and the guy I bought it from had the surface gap plugs in it which I know little about. I bought a set of the QL77JC4 plugs because that is what the engine calls for.
Have any of you seen these symptoms before? Easy start, idle smooth(ish) for a few seconds, then quit? There isn't a lot of smoke, the water pump is working, and it's very repeatable.
Thanks,
Gregg
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