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my first hydrostream was a balsa core......that was rotten

ADT is not as good as it once was. following along out of curiosity. my first reaction is to use this:

Ted, drink one or two for us......

15.5" is largest that fits on an alpha

most likely you will need to cut the harness back and re-terminate. easy to do with the correct terminals. to pull the terminals out of the receptacle, you need to insert the proper tool to release the tab

Im thinking the pitch/diamter is backwards on the OP's statement. aluminum is 14-1/2" dia, 18P and the SS is 15-1/4" dia, 18p the alpha drive wont allow larger than a 15-1/2" generally 4-blade props are even pitches, so going to assume the 18 is pitch

did you pressure test when it was empty of oil? If not, keep adding oil until its on the dipstick. then monitor. if it continues to drop, you have a bad seal

all readings need to be engine running. very few are KOEO

IAC should not be open that far. usually about 40-50 the 5.0 being read at 4.23 means something is drawing down the 5.0 reference. could be a bad ground in the harness

its just one of many of Jimmys fleet of boats. he also had a Westport that was being serviced down at Rybovich, and about 5 in the evening, he would do an impromptu show for the Rybovich crew working on his boat.

the labeling is what i figured. thanks for that. and at 1100+ is why when the raw water stops flowing, the rubber exhaust couplings that have a 250 F max turn into crispy critters...... its also why I run silicone/nomex hose vs the rubber. good news on getting what ever flow obstruction in...

well, the replacement that Amazon supposedly sent on Saturday still has not shipped. the one I ordered last night shows it shipped and is out for delivery. and people wonder why I am constantly muttering "amazon sucks" To top it off, I am chasing a fed ex package that has been sitting in...

Most likely added by the prior owner. Agree with AD, missing the check valve and cap

Ted, the rule of thumb with motors. 1/3 the fuel goes to turning the crank, 1/3 goes to heating the block, 1/3 goes to heating the exhaust

Ted, I would almost measure flow in lines G. which in a closed system with hot glycol is a PITA.

Not enough to notice. it should be about 45-50 psi I would change it

you test fuel pressure with a mechanical pressure gauge at the schroeder valve verify the crab cap is in good order. get a new one if the old one is more than a year old test compression with a known good gauge. should be between 140 and 150 psi on all cylinders

it could be a throttle linkage issue it could be a fuel system issue it could be a wrong prop issue it could be an ignition issue what troubleshooting has been done? compression test? fuel pressure? does your motor have the crab cap? are the injectors from Mercruiser or ebay or amazon?

the hoses could have deteriorated, the new hoses are more tolerant of E10 than the hosed that were in your boat 35 years ago, however the hoses only last about 20 years do not use the boat until you find the fuel leak

Ted, Im not an expert, just trying to wrap my head around some of the goofy crap from Fond du Lac do you have the schematic of the glycol side plumbing? i can see the manifold exit to the expansion tank in the pics. I assume the lower hose in just under the center cylinders is the supply for...