Hello everyone,
I am in the process of repowering a 2004 Maxum 1800SR3 boat I purchased with a blown motor. I found a nice replacement Mercruiser 4.3L V6 engine which is almost an identical replacement to the engine that came in the boat. My only concern is that the old boat had a crank sensor right under the harmonic balancer and the replacement motor has the spot for it, but it seems the sensor hole is blocked out and the other smaller hole has no threads for the bolt to screw into. It seems that one engine used a crank sensor and the other didn't. What is confusing me is that both engines are carbureted and I was informed that carbureted motors do not use crank position sensors, the wiring harness that came attached to the original engine also doesn't have a place for the sensor to connect making me really stumped, unless the sensor connects somewhere else.
The original engine serial is 0W015792 and mercruiser parts lists the timing chain cover with sensor, so it is showing me a carbureted engine does need the sensor which would mean I have wrong info about the motors.
The replacement motor is odd, it has the Mercury serial number plate on the engine but the numbers are 021346 which doesn't follow any Mercruiser number scheme.
If that is the case, It leads me to another question, why can't the timing chain covers be reused? They are stamped with replace after removing, but if it is removed cleaned and a new seal is added, can it be salvaged? Looks like they go for over $200 to replace.
Thanks for your time and help.
I am in the process of repowering a 2004 Maxum 1800SR3 boat I purchased with a blown motor. I found a nice replacement Mercruiser 4.3L V6 engine which is almost an identical replacement to the engine that came in the boat. My only concern is that the old boat had a crank sensor right under the harmonic balancer and the replacement motor has the spot for it, but it seems the sensor hole is blocked out and the other smaller hole has no threads for the bolt to screw into. It seems that one engine used a crank sensor and the other didn't. What is confusing me is that both engines are carbureted and I was informed that carbureted motors do not use crank position sensors, the wiring harness that came attached to the original engine also doesn't have a place for the sensor to connect making me really stumped, unless the sensor connects somewhere else.
The original engine serial is 0W015792 and mercruiser parts lists the timing chain cover with sensor, so it is showing me a carbureted engine does need the sensor which would mean I have wrong info about the motors.
The replacement motor is odd, it has the Mercury serial number plate on the engine but the numbers are 021346 which doesn't follow any Mercruiser number scheme.
If that is the case, It leads me to another question, why can't the timing chain covers be reused? They are stamped with replace after removing, but if it is removed cleaned and a new seal is added, can it be salvaged? Looks like they go for over $200 to replace.
Thanks for your time and help.
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